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| 1 | The Reference Genome of Tea Plant and Resequencing of 81 Diverse Accessions Provide Insights into Its Genome Evolution and Adaptation显示文摘Tea plant is an important economic crop,which is used to produce the world's oldest and most widely consumed tea beverages.Here,we present a high-quality reference genome assembly of the tea plant(Camellia sinensis var.sinensis)consisting of 15 pseudo-chromosomes.LTR retrotransposons(LTR-RTs)account for 70.38%of the genome,and we present evidence that LTR-RTS play critical roles in genome size expansion and the transcriptional diversification of tea plant genes through preferential insertion in promoter regions and introns.Genes,particularly those coding for terpene biosynthesis pro-teins,associated with tea aroma and stress resistance were significantly amplified through recent tandem duplications and exist as gene clusters in tea plant genome.Phylogenetic analysis of the sequences of 81 tea plant accessions with diverse origins revealed three well-differentiated tea plant populations,support-ing the proposition for the southwest origin of the Chinese cultivated tea plant and its later spread to western Asia through introduction.Domestication and modern breeding left significant signatures on hundreds of genes in the tea plant genome,particularly those associated with tea quality and stress resis-tance.The genomic sequences of the reported reference and resequenced tea plant accessions provide valuable resources for future functional genomics study and molecular breeding of improved cul-tivars of tea plants. | Enhua Xia Wei Tong Yan Hou Yanlin An Linbo Chen Qiong Wu Yunlong Liu Jie Yu Fangdong Li Ruopei Li Penghui Li Huijuan Zhao Ruoheng Ge Jin Huang Ali Inayat Mallano Yanrui Zhang Shengrui Liu Weiwei Deng Chuankui Song Zhaoliang Zhang Jian Zhao Shu Wei Zhengzhu Zhang Tao Xia Chaoling Wei Xiaochun Wan | 2020 | Molecular Plant2020，13，7： | 51 |
| 2 | Characterization and Genome Changes of New Amphiploids from Wheat Wide Hybridization显示文摘引进外来基因或染色体片段的野生亲缘种小麦(Triticum spp.)一直被认为是小麦育种的宝贵(valkoun,2001)。几个亲戚,如黑麦(Gupta和牧羊人,1993;马等人。,2000),长穗偃麦草(刘等人。,2008),第。中间偃麦草(曹等人。,2014)和日。麦草(Li等人。,2008)表现出明显的应用有趣的基因或性状导入小麦。然而,在使用这些遗传资源仍然存在一些挑战。导入片段往往带来外来基因对性状的潜在的负面影响。在这封信中,我们主要集中在小麦和黑麦之间的多倍体合成的多策略,日。长穗偃麦草,日。麦草和TH。麦草。我们已经成功地选择了不同的新的倍体小黑麦、小偃麦线进行优良的抗病基因,为小麦育种提供了重要的遗传资源。 | Xiang Guo Qinghua Shi Jing Wang Yanlin Hou Yuhai Wang Fangpu Han | 2015 | Journal of Genetics and Genomics2015，42，8： | 3 |
| 3 | Pool Sizes and Turnover of Soil Organic Carbon of Farmland Soil in Karst Area of Guilin显示文摘The three-pool and first-order model separates the mineralizable organic carbon into active,slow,and passive carbon pools.This paper used the model and decomposition curves of the soil organic carbon to fit the active pool and its decomposition rate,slow pool and its decomposition rate.The results showed that the size of the active pool from different profiles accounted for 2.09%-3.08% of the total soil organic carbon and the mean residue time was 3.57-17.21 days.And the size of the slow pool accounted for 3.19%-43.55% and the mean residue time was 1.12-4.94 years.Acid hydrolysis(6M HCl) was used to fractionate the passive organic carbon,which accounted for 50.83%-94.44% of the total soil organic carbon. | YANG Hui CAO Jianhua ZHANG Liankai HOU Yanlin MAO Lifeng | 2011 | Journal of Northeast Agricultural University(English Edition)2011，18，1： | 2 |
| 4 | Bioinspired multichannel colorful encryption through kirigami activating grating显示文摘Optical encryption,exploiting degrees of freedom of light as parameters to encode and decode information,plays an indispensable role in our daily life.Responsive structural color materials can give real-time visible feedback to external stimuli and provide ideal candidates for optical encryption.However,the development of existing responsive structural color materials is hindered by poor repeatability and long feedback time.Meanwhile,there are only few strategies to exploit structural colors in multichannel information encryption.Herein,bioinspired by the structural color variation due to a change in angle arising from the movement of animal’s scales or feathers,we developed a general multichannel information encryption strategy using a two-dimensional deformable kirigami arranging orientations of the grating arrays by design.The kirigami grating sheet shows rapid,repeatable,and programmable color change.This strategy utilizes the topological space deformation to guide the change of optical property,which suggests new possibilities for spatial and spectral encryption as well as mechano-sensing and camouflage. | Xiaoyu Hou Florian Vogelbacher Xintao Lai Kaixuan Li Yanlin Song Mingzhu Li | 2023 | Science Bulletin2023，，3： | 2 |
| 5 | Phosphorus sorption-desorption by purple soils of China in relation to their properties显示文摘 | Li Mei Hou Yanlin Zhu Bo | 2007 | Austrolian Journal of Soil Research2007，45，： | 1 |
| 6 | Properties and precipitates of the high strength and electrical conductivity Cu-Ni-Co-Si-Cr alloy显示文摘In this paper,a novel Cu-1.5 Ni-1.1 Co-0.6 Si-0.1 Cr(wt.%)alloy with high strength and electrical conductivity was designed.After aging,excellent properties of 857±12 MPa yield strength,300±8 HV microhardness,42.8±2.5%IACS conductivity,and 7±0.5%elongation were obtained.According to the atomic structure,part of Ni atoms in Ni_(2)Si can be replaced by Co atoms to form nano-precipitates(Ni,Co)_(2)Si.The alloy’s high strength and conductivity are mainly attributed to the fine and uniformly distributed(Ni,Co)_(2)Si and Cr nano precipitates.The alloy strength was also enhanced by twins,dislocations,and grain refining strengthening.Based on the investigations of deformation microstructure and the orientation relationship between the(Ni,Co)_(2)Si precipitates and the Cu matrix,the main reason for elongation increase is attributed to the formation of deformation twins and the small lattice mismatch strain at the coherent interfaces of precipitates and the Cu matrix. | Yijie Ban Yongfeng Geng Jinrui Hou Yi Zhang Meng Zhou Yanlin Jia Baohong Tiana Yong Liua Xu Li Alex A.Volinsky | 2021 | Journal of Materials Science & Technology2021，，34： | 1 |
| 7 | Citric and Oxalic Acids Effect on Pb and Zn Uptake by Maize and Winter Wheat显示文摘A pot experiment was conducted to investigate the influence of citric and oxalic acids effect on Pb and Zn uptake by corn and winter wheat. The experiment was employed with citric acid (CA) applied at 3 rates (0, 1.5 and 3.0 mmol kg-1 soil), oxalic acid (OA) at 3 rates (0, 1.5 and 3.0mmol kg-1 soil) and citric acid combined with oxalic acid (1.5 mmol citric acid combined with 1.5 mmol oxalic acid kg-1). Two types of soil were chose in the experiment. One was collected from the agricultural soil near a battery-recycling factory in Anhui province, China (site A) and the other was collected from a Pb-Zn mine residues in Hunan province, China (site B). The results showed that soil pH varied with the different treatment of citric and oxalic acids. However, there were no differences in all the treatments. 3.0mmol CA kg-1 soil addition significantly increased the concentrations of the CaCI2-extractable Pb and Zn and other treatments have no significantly increased. The highest shoot concentrations of Pb and | Wang Xinmin, Hou Yanlin & Jie Xiaolei Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China Department of Resource and Environment, Henan Agricultural University, Zhengzhou 450002, China. | 2004 | Chinese Journal of Population,Resources and Environment2004，2，4： | 1 |
| 8 | Research on the Index System of Ecological Balanced Fertilization for Three Crops显示文摘This paper studied the index system of ecological balanced fertilization for three crops by data mining method based on data of'3414 fertilizer field trials'of rice,wheat and maize by published papers from national soil testing and recommendation since 2005.A systematic analysis of the materials and methods,the main research contents,the main research results and the main research conclusions of the column was made,in order to enable readers to understand and grasp the overall contents of the following 15 papers. | Shutian LIU Hongyan ZHENG Zhiping HUANG Xianda HOU Shuojin WANG Jian DING Changhong MI Ling LU Yanlin HOU | 2020 | Meteorological and Environmental Research2020，11，5： | 0 |
| 9 | Summary on the Index System of Ecological Balanced Fertilization for Rice显示文摘This paper studied the index system of ecological balanced fertilization for rice by data mining method based on data of'3414 fertilizer field trials'of rice by published papers from national soil testing and recommendation since 2005.The results and conclusions were as follows:①the optimum N,P and K fertilization amounts of rice were within the normal range,and the application of this standard could not cause obvious non-point source pollution.②N,P and K conversion ratios were 76.4%,166.58%and 261.89%higher than N,P and K utilization ratios under the optimum fertilizer amount of rice,respectively.③At present,the soil N for rice was in a low equilibrium stage,and soil P and K were in the middle and high level,in which P was in the accumulation stage,while K was in the depletion stage.④The relationship between fertilizer effect or fertility and optimum production had consistency.The fertilizer effect was negatively correlated with the optimum fertilization amount of its own nutrient.N,P and K fertilizers had mutual promoting effect when they were balanced.Soil nutrient played an inhibitory role in the fertilizer efficiency of its own nutrient.Soil nutrient sometimes played a role in promoting the efficiency of other nutrients,and sometimes inhibited them.It was a positive correlation between soil nutrients with the same attribute. | Ling LU Jian DING Hongyan ZHENG Shutian LIU Xianda HOU Shuojin WANG Zhiping HUANG Changhong MI Yanlin HOU | 2020 | Meteorological and Environmental Research2020，11，5： | 0 |
| 10 | Specific Index System of Ecological Balanced Fertilization for Rice显示文摘This paper studied the nitrogen index system of ecological balanced fertilization for rice by data mining method based on data of'3414 fertilizer field trials'of rice by published papers from national soil testing and recommendation since 2005.The results and conclusions were as follows.①Soil nutrient content could not be used as fertilization indicator of rice.②The conceptual model of nitrogen conversion rate of rice for plot was Y N≈a+b×optimum production-c×optimum nitrogen fertilization amount-d×optimum phosphorus fertilization amount,and the conceptual model of phosphorus conversion rate was Y P≈a-b×optimum phosphorus fertilization amount-c×optimum potassium fertilization amount,and the conceptual model of potassium conversion rate was Y K≈a+b×optimum production+c×optimum nitrogen fertilization amount-d×optimum potassium fertilization amount-e×annual average precipitation.③The conceptual model of the optimum nitrogen fertilization amount of rice for plot was Y N≈a+b×optimum production+c×optimum phosphorus fertilization amount-d×annual average precipitation,and the conceptual model of the optimum phosphorus fertilization amount was Y P≈a+b×optimum nitrogen fertilization amount+c×optimum potassium fertilization amount,and the conceptual model of the optimum potassium fertilization amount was Y K≈a+b×optimum phosphorus fertilization amount+c×annual average precipitation.④The conceptual model of relative abundance-deficiency value of soil nitrogen of rice for plot was Y N≈a-b×optimum nitrogen fertilization amount-c×optimum potassium fertilization amount,and the conceptual model of relative abundance-deficiency value of soil phosphorus was Y P≈a+b×soil available potassium-c×optimum potassium fertilization amount,and the conceptual model of relative abundance-deficiency value of soil potassium of rice was Y K≈a-b×optimum potassium fertilization amount. | Xianda HOU Changhong MI Shuojin WANG Shutian LIU Zhiping HUANG Hongyan ZHENG Jian DING Ling LU Yanlin HOU | 2020 | Meteorological and Environmental Research2020，11，5： | 0 |
| 11 | Study on the Relationship between Utilization Ratios and Conversion Rates of Nitrogen,Phosphorus and Potassium for Rice显示文摘This paper studied the relationships between utilization ratios and conversion rates of nitrogen,phosphorus and potassium for rice by data mining method based on data of'3414 fertilizer field trials'of rice by published papers from national soil testing and recommendation since 2005.The results and conclusions were as follows:①the conceptual model of fertilizer utilization ratio of rice for plot was that,Y N≈a+b×optimum yield+c×optimum fertilizer amount of K,Y P≈a+b×optimum yield,Y K≈a respectively.②Fertilizer utilization ratio and nutrient conversion rate had 4 kinds of relationships:①no significant relationships:25,of which 14 were soil nutrients and 9 were environmental factors,the results showed that soil nutrients and environmental factors had little effect on nutrient yield ratio and fertilizer utilization ratio;②consistent significant relationships:2,one was that yield ratio and utilization ratio of N were positively correlated with the optimum production,explaining the importance of N for production,the other was that yield ratio and utilization ratio of P had a significantly positive correlation with conversion rate and utilization ratio of N,illustrating that nitrogen and phosphorus had mutual promotion;③contrary significant relationships:5,these showed as negative correlations of fertilizer utilization ratio and positive correlation of nutrient conversion ratio;④complementary significant relationships:22,the cause of the complementary phenomenon was that the fertilizer utilization ratio was the index of fertilizer efficiency in one season,while the nutrient conversion rate was the index of fertilizer efficiency in more seasons,which showed that the fertilizer utilization rate was significantly correlated,or the nutrient conversion rate was significantly correlated. | Shuojin WANG Zhiping HUANG Changhong MI Hongyan ZHENG Jian DING Shutian LIU Xianda HOU Ling LU Yanlin HOU | 2020 | Meteorological and Environmental Research2020，11，5： | 0 |
| 12 | Summary on the Index System of Ecological Balanced Fertilization for Wheat显示文摘This paper studied the index system of ecological balanced fertilization for wheat by data mining method based on data of'3414 fertilizer field trials'of wheat by published papers from national soil testing and recommendation since 2005.The results and conclusions were as follows:①the optimum N,P and K fertilization amounts of wheat were within the normal range,and the application of this standard could not cause obvious non-point source pollution.②The conversion rates of N,P and K of wheat were 58.78%,58.63%and 199.88%higher than the utilization ratios of N,P and K under the optimum fertilization amount,respectively.③At present,the soil N for wheat was in a low equilibrium stage,and soil P and K were in the middle and high levels,in which P was in the accumulation stage,and K was in the depletion stage.④The relationship between fertilizer effect or fertility and optimum production had consistency.The fertilizer effect was negatively correlated with the optimum fertilization amounts of its own nutrient and other nutrients.N,P and K fertilizers had mutual promoting effects when they were balanced.Soil nutrient played an inhibitory role in the fertilizer efficiency of its own nutrient.⑤The phosphorus and potassium utilization ratios were significantly positively correlated with the optimum phosphorus fertilization amount and the optimal potassium fertilization amount,which was the scientific basis for phosphorus and potassium concentrated fertilization of wheat. | Zhiping HUANG Shuojin WANG Shutian LIU Xianda HOU Hongyan ZHENG Jian DING Changhong MI Ling LU Yanlin HOU | 2020 | Meteorological and Environmental Research2020，11，5： | 0 |
| 13 | Specific Index System of Ecological Balanced Fertilization for Wheat显示文摘This paper studied the index system of ecological balanced fertilization for wheat by data mining method based on data of'3414 fertilizer field trials'of wheat by published papers from national soil testing and recommendation since 2005.The results and conclusions were as follows.①Soil nutrient content could not be used as indicator of fertilizer application of wheat.②The conceptual model of N utilization ratio of wheat for plot was Y N≈a+b×optimum production-c×optimum fertilizer amount of N-d×temperature in growing season-e×rainfall in growing season,and the conceptual model of P conversion rate was Y P≈a+b×optimum production+c×temperature in growing season+d×precipitation in growing season-e×optimum fertilizer amount of P-f×optimum fertilizer amount of K,and the conceptual model of K conversion rate of wheat plots was that,Y K≈a-b×optimum fertilizer amount of K.③The conceptual model of the optimum fertilizer amount of N of wheat for plot was Y N≈a+b×optimum production+c×optimum fertilizer amount of P-d×temperature in growing season-e×rainfall in growing season,and the conceptual model of the optimum fertilizer amount of P was Y P≈a+b×optimum production+c×optimum fertilizer amount of N+d×optimum fertilizer amount of K,and the conceptual model of the optimum fertilizer amount of K was Y K≈a+b×optimum fertilizer amount of P.④The conceptual model of relative abundance-deficiency value of soil N of wheat for plot was that Y N≈a-b×temperature in growing season-c×precipitation in growing season,and the conceptual model of relative abundance-deficiency value of soil P was Y P≈a+b×optimum yield+c×optimum fertilizer amount of N+d×precipitation in growing season-e×optimum fertilizer amount of K,and the conceptual model of relative abundance-deficiency value of soil K was Y K≈a+b×optimum yield+c×optimum fertilizer amount of K. | Zhiping HUANG Ling LU Shutian LIU Shuojin WANG Xianda HOU Hongyan ZHENG Jian DING Changhong MI Yanlin HOU | 2020 | Meteorological and Environmental Research2020，11，5： | 0 |
| 14 | Study on the Relationships between Utilization Ratios and Conversion Rates of Nitrogen,Phosphorus and Potassium for Wheat显示文摘This paper studied the relationships between utilization ratios and conversion rates of nitrogen,phosphorus and potassium for wheat by data mining method based on data of'3414 fertilizer field trials'of wheat by published papers from national soil testing and recommendation since 2005.The results and conclusions were as follows:①the conceptual model of fertilizer utilization ratio of wheat for plot was that,Y N≈a+b×optimum nitrogen application amount+c×optimum fertilizer amount of K+d×rainfall in growth season,Y P≈a+b×optimum fertilizer amount of K+c×rainfall in growth season,Y K≈a+b×temperature in growth season+c×rainfall in growth season-d×optimum yield-e×optimum nitrogen application amount,respectively.②Fertilizer utilization ratio and nutrient conversion rate had 4 kinds of relationships.No significant relationships:13,of which 8 were soil nutrients,the results showed that soil nutrients had little effect on nutrient conversion rate and fertilizer utilization ratio;consistent significant relationships:4,they were all nitrogen and phosphorus,explaining the importance of nitrogen and phosphorus;contrary significant relationships:6,they were all nitrogen and phosphorus,illustrating that phosphorus and nitrogen had inhibitory effect;complementary significant relationships:31,the cause of the complementary phenomenon was that the fertilizer utilization ratio was the measuring index of fertilizer efficiency in one season,while the nutrient conversion rate was the measuring index of fertilizer efficiency in more seasons.It showed that the fertilizer utilization rate was significantly correlated,or the nutrient conversion rate was significantly correlated. | Zhiping HUANG Xianda HOU Shutian LIU Shuojin WANG Hongyan ZHENG Jian DING Changhong MI Ling LU Yanlin HOU | 2020 | Meteorological and Environmental Research2020，11，5： | 0 |
| 15 | Summary on the Index System of Ecological Balanced Fertilization for Maize显示文摘This paper studied the index system of ecological balanced fertilization for maize by data mining method based on data of'3414 fertilizer field trials'of maize by published papers from national soil testing and recommendation since 2005.The results and conclusions were as follows:①the optimum N,P and K fertilization amounts of maize were within the normal range,and the application of this standard could not cause obvious non-point source pollution.②The conversion rates of N,P and K of maize were respectively higher than their respective utilization ratios under the optimum fertilization amount.③At present,the soil N for maize was in an absence state,and soil P and K were in a state of not obvious lack.④Optimum N,P and K fertilization amounts were significantly negatively correlated with their respective conversion ratios,respectively,and it provided a quantitative scientific basis for calculating the optimum fertilization amount according to the nutrient conversion rate.Each province can use this significant relationship to guide the determination of the average optimal fertilization amounts of N,P and K and the optimal production in the province.⑤The research results of nutrient conversion rate showed that any excessive application of N,P and K would reduce their own nutrient conversion rates,and may also reduce the conversion rates of other nutrients.The characteristics of crops absorbing N,P and K proportionally required that soil nutrients must be balanced in order to obtain high production,and fertilization was only the main means to regulate soil nutrient balance. | Hongyan ZHENG Shutian LIU Xianda HOU Shuojin WANG Zhiping HUANG Jian DING Changhong MI Ling LU Yanlin HOU | 2020 | Meteorological and Environmental Research2020，11，5： | 0 |
| 16 | Specific Index System of Ecological Balanced Fertilization for Maize显示文摘This paper studied the index system of ecological balanced fertilization for maize by data mining method based on data of'3414 fertilizer field trials'of maize by published papers from national soil testing and recommendation since 2005.The results and conclusions were as follows.①Soil nutrient content could not be used as indicator of fertilizer application of maize.②The conceptual model of N conversion rate of maize for plot was Y N≈a+b×optimum production-c×optimum fertilizer amount of N-d×optimum phosphorus application amount-e×optimum potassium application amount-f×temperature in growth season-g×rainfall in growth season.The conceptual model of P conversion rate of maize for plot was Y P≈a+b×optimum phosphorus application amount-c×optimum nitrogen application amount-d×optimum potassium application amount.The conceptual model of K conversion rate of maize for plot was Y K≈a+b×optimum yield-c×optimum nitrogen application amount-d×optimum phosphorus application amount-e×optimum potassium application amount-f×temperature in growth season-g×rainfall in growth season.③The conceptual model of the optimum fertilizer amount of N of maize for plot was Y N≈a+b×optimum phosphorus application amount+c×optimum potassium application amount+d×temperature in growing season+e×rainfall in growing season,and the conceptual model of the optimum fertilizer amount of P was Y P≈a+b×optimum nitrogen application amount,and the conceptual model of the optimum fertilizer amount of K was Y K≈a+b×optimum nitrogen application amount+c×temperature in growth season+d×rainfall in growth season-e×optimum yield.④The conceptual model of relative abundance-deficiency value of soil N of maize for plot was that Y N≈a,and the conceptual model of relative abundance-deficiency value of soil P was Y P≈a,and the conceptual model of relative abundance-deficiency value of soil K was Y K≈a+b×optimum nitrogen application amount+c×optimum phosphorus application amount. | Keyu LIN Hongyan ZHENG Zhiping HUANG Jian DING Changhong MI Shutian LIU Xianda HOU Shuojin WANG Ling LU Yanlin HOU | 2020 | Meteorological and Environmental Research2020，11，5： | 0 |
| 17 | Study on the Relationships between Utilization Ratios and Conversion Rates of Nitrogen,Phosphorus and Potassium for Maize显示文摘This paper studied the relationships between utilization ratios and conversion rates of nitrogen,phosphorus and potassium for maize by data mining method based on data of'3414 fertilizer field trials'of maize by published papers from national soil testing and recommendation since 2005.The results and conclusions were as follows:①the conceptual model of fertilizer utilization ratio of maize for plot was that,Y N≈a+b×optimum yield,Y P≈a+b×optimum yield-c×optimum nitrogen application amount-d×optimum potassium application amount,Y K≈a-b×optimum nitrogen application amount-c×temperature in growth season-d×rainfall in growth season,respectively.②Fertilizer utilization ratio and nutrient conversion rate had 4 kinds of relationships.No significant relationships:22,of which 16 were soil nutrients and 5 were environmental factors,the results showed that soil nutrients and environmental factors had little effect on nutrient conversion rate and fertilizer utilization ratio;consistent significant relationships:14,illustrating that conversion rate and utilization ratio of maize were consistent in most cases,and it was because that maize was planted for a long term,and its fertilizer absorption law was basically stable;contrary significant relationships:0,illustrating that there was no reverse relationship between conversion rate and utilization ratio of maize;complementary significant relationships:18,the cause of the complementary phenomenon was that the fertilizer utilization ratio was the measuring index of fertilizer efficiency in one season,while the nutrient conversion rate was the measuring index of fertilizer efficiency in more seasons.It showed that the fertilizer utilization ratio was significantly correlated,or the nutrient conversion rate was significantly correlated. | Hongyan ZHENG Ling LU Xianda HOU Shuojin WANG Zhiping HUANG Jian DING Changhong MI Shutian LIU Yanlin HOU | 2020 | Meteorological and Environmental Research2020，11，5： | 0 |
| 18 | Comparison of the Index System of Ecological Balanced Fertilization for Three Crops显示文摘This paper conducted comparative study of the index system of ecological balanced fertilization for rice,wheat and maize by data mining method based on data of'3414 fertilizer field trials'of rice,wheat and maize by published papers from national soil testing and recommendation since 2005.The main conclusions of this paper were as follow:①since the three crops all belonged to Gramineae,they were consistent in variation trends of fertilizer utilization ratio,nutrient conversion rate,relative abundance-deficiency value of soil nutrient,optimum fertilization amount in most cases.②Due to the influence of the economic production,biological production,different water conditions in paddy field and dry farmland,length of growing season,cropping system(one year before and after the rotation)and so on,sometimes the laws of four aspects above mentioned for the three crops had opposite and gradient variations. | Xianda HOU Hongyan ZHENG Shuojin WANG Shutian LIU Zhiping HUANG Jian DING Changhong MI Ling LU Yanlin HOU | 2020 | Meteorological and Environmental Research2020，11，5： | 0 |
| 19 | Theoretical Analysis on Index System of Ecological Balanced Fertilization for Three Crops显示文摘This paper analyzed theoretical basis of ecological balanced fertilization by data mining method based on the relationships among relative abundance-deficiency values of soil nutrients,optimum fertilization amounts and nutrient conversion rates of N,P and K for rice,wheat and maize in column papers.The results and conclusions were as follows:①the scientific basis of guiding fertilization by the relative abundance-deficiency value of soil nutrient was insufficient.②The scientific basis for predicting fertilizer amount according to nutrient conversion rate was sufficient.③There was consistency among the relative abundance-deficiency values of soil nutrients,indicating that the soil nutrient balance was important to the production.④There was some consistency among the optimum fertilizer amounts,indicating that N,P and K fertilizer should be balanced.⑤There was some consistency among nutrient conversion rates,indicating that nutrient uptake was consistent,which required the consistency among relative abundance-deficiency values of soil nutrients.When there was inconsistency,it needed to be supplemented by means of fertilization.⑥The relative abundance-deficiency value of soil nutrient and optimum fertilizer amounts of other nutrients were negatively correlated mostly,indicating that if the relative abundance-deficiency value of soil nutrient was high,the others also should be high,resulting in optimum fertilizer amounts of other nutrients decreased.⑦The nutrient conversion rate was negatively correlated mostly with the optimal fertilizer amounts of other nutrients,indicating that more fertilizer amount of one nutrient lowered its own conversion rate,mean while also reduced the conversion rates of other nutrients.It embodied the unity and balance of nutrient absorption by the crops. | Shuojin WANG Changhong MI Zhiping HUANG Shutian LIU Xianda HOU Hongyan ZHENG Jian DING Ling LU Yanlin HOU | 2020 | Meteorological and Environmental Research2020，11，5： | 0 |
| 20 | Research and Application of Prediction Model for Ecological Balanced Optimal Fertilization Amount for Three Crops显示文摘This paper analyzed the modeling principle,process and application process of the new ecological balanced fertilization model by data mining method based on the relationships among soil abundance-deficiency index,optimum fertilization amount and nutrient conversion rate of N,P,K for rice,wheat and maize in column papers.The results and conclusions were as follows:①on the basis of two ecological balanced fertilization models(available and total nutrients),a prediction model system of optimum fertilization amount based on nutrient conversion rate was established,including 3 models.The first model predicted the optimum fertilization amount based on nutrient conversion rate,and the second model determined prediction difference value of optimum fertilization amount in the first amendment based on optimum yield,and the third model determined prediction difference value of optimum fertilization amount in the second amendment based on nutrient conversion rate.②Nutrient conversion rate and optimum yield were the common parameters of two models based on contents of available and total nutrients,and they were the core parameters of ecological balanced fertilization model.In the specific application,the nutrient conversion rate and optimum yield were determined mainly based on the comprehensive comparison between the regional or similar plot or one plot and the experimental plot.③The two error amendments were due to the use of the fixed nutrient removal of 100 kg seeds,and underestimated the nutrient conversion rate when higher optimum production and overestimated the nutrient conversion rate when lower optimum production.④It was proposed that the nutrient conversion rate was regarded as a comprehensive nutrient index(abundance-deficiency)of ecological balanced fertilization.It was not only a parameter to measure fertilizer efficiency,but also a parameter to measure the abundance-deficiency of nutrients,and a parameter to guide fertilization. | Zhiping HUANG Shutian LIU Xianda HOU Shuojin WANG Hongyan ZHENG Jian DING Changhong MI Ling LU Yanlin HOU | 2020 | Meteorological and Environmental Research2020，11，5： | 0 |
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