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| 1 | 香根草根系固土拉力的原位测定显示文摘应用锚杆拉力计和项目组自行设计改进的剪切箱,原位测定了不同深度(10 cm,20 cm)分蘖期香根草根系固土、单根拉力。结果表明,在给香根草施加载荷初期,根系都会发生弹性形变,荷载与位移都按比例增加,呈现一定的线性关系。当载荷超过根系抗拉极限后,随着拉力的继续增加,根系发生塑性形变,载荷与位移关系逐渐偏离直线,反映出非线性弹性特征,测定的土体样方与土体分离。但与裸土样方相比,在施加同样载荷的情况下,有根样方位移明显要小于无根样方,说明香根草具有一定的固土能力,并且根系入土越深,植物固土能力越强。 | 王斌 范茂攀 郑毅 Michael Augustin FULLEN 李永梅 | 2012 | 云南农业大学学报(自然科学版)2012,27,2: | 9 |
| 2 | 玉米根系原位固土力学特性研究显示文摘通过采用自制的剪切箱和锚杆拉力计对玉米(云瑞8号,Zea mays.L)根系在10 cm和20 cm两个深度上和空地样方的固土能力进行了原位测定比较。结果表明,施加相同载荷时,两种深度空地样方位移大于有根玉米样方;20 cm深度样方位移为4个样方中最小。作物扎根越深,达到剪切分离样方特征点所需的载荷越大。10cm玉米样方屈服拉力点载荷为2.7 kN,抗拉极限点载荷为2.9 kN;20 cm玉米样方屈服拉力点载荷为3.6 kN,抗拉极限点载荷为3.61 kN;10 cm空地样方两点载荷分别为2.3 kN和2.5 kN;20 cm深度空地样方载荷分别为3.1 kN和3.4 kN。该方法可直接量化测定玉米根系固土能力,为农业水土保持提供了有效研究手段。 | 郑朝元 范茂攀 郑毅 Michael Augustin FULLEN 李永梅 Mudhu SUBEDI | 2010 | 云南农业大学学报(自然科学版)2010,25,4: | 7 |
| 3 | 油菜根系固土拉力的原位测定研究显示文摘应用锚杆拉力计和自行设计的剪切箱对不同根系密度的油菜根系固土能力在10 cm深度进行了原位测定。结果表明,当施加载荷达到3.5 kN时,生长有油菜的土壤样方1(根系密度为1.11 kg/m3)位移为38.0mm,生长有油菜的土壤样方2(根系密度为0.57 kg/m3)位移为46.0 mm,而裸土样方位移为49.7 mm。土壤样方内根系密度越大,达到土壤样方与土体分离的特征点所需要施加的载荷就越大。土壤样方1的屈服拉力点为3.5 kN,抗拉极限点为4.0 kN;而土壤样方2的屈服拉力点为3.1 kN,抗拉极限点为3.5 kN。该测定方法可以在水土保持上作为评价不同作物(植物)固土能力的有效参考手段。 | 毛妍婷 郑毅 Michael Augustin FULLEN 李永梅 Mudhu SUBEDI | 2008 | 云南农业大学学报(自然科学版)2008,23,6: | 6 |
| 4 | Slope Processes, Mass Movement and Soil Erosion: A Review显示文摘Soil erosion and land degradation are global problems and pose major issues in many countries.Both soil erosion and mass movement are two forms of land degradation and humans play important roles in these geomorphological processes.This paper reviews slope processes associated with mass movement and soil erosion and contributory factors,including physical and human agents.Acting together,these cause diverse geomorphological features.Slope processes are illustrated by reference to case studies from Brazil and UK.The causes and impacts of erosion are discussed,along with appropriate remedial bioengineering methods and the potential of the measures to prevent these types of environmental degradation.Although there are several agents of erosion,water is the most important one.Cultivation can promote soil erosion,due to ploughing and harvesting,which moves soil down slopes.Soil erosion and mass movement data would inform the viability of soil conservation practices.Integrated management of drainage basins offers a promising way forward for effective soil conservation and soil remedial bioengineering in Brazil and UK. | Antonio Jos Teixeira GUERRA Michael Augustine FULLEN Maria do Carmo Oliveira JORGE Joss Fernando Rodrigues BEZERRA Mohamed S. SHOKR | 2017 | Pedosphere2017,27,1: | 4 |
| 5 | Synergistic effects of vegetation layers of maize and potato intercropping on soil erosion on sloping land in Yunnan Province, China显示文摘Intercropping, as an overyielding system, can decrease soil erosion on sloping land through the presence of dense canopy covers. However, the structure mechanism in canopy is still unclear. We conducted a two-year field experiment on runoff plots, exploring whether the interaction between vegetation layers reduce soil erosion in maize and potato intercropping systems. The maize, potato, and weed layers in the intercropping system were removed by a single layer, two layers and three layers, respectively(total of 8 treatments including all layers removed as the control). Then, throughfall, runoff and sediment were measured at the plot and row scale on a weekly basis. Based on the difference between each treatment and the control, we calculated and found a relative reduction of runoff and sediment by any combination of the two vegetation layers greater than the sum of each single layer. In 2016 and 2017, the highest relative reduction of runoff reached 15.65% and 46.73%, respectively. Sediment loss decreased by 33.96% and 42.77%, respectively. Moreover, runoffand sediment reduced by the combination of all vegetation layers(no layers removed) was also larger than the sum of that by each single layer. In 2016 and 2017, the highest relative reduction of runoff reached 7.32% and 3.48%, respectively. So, there were synergistic effects among multi-level(two or three layers) vegetation layers in terms of decreasing soil erosion on sloping land. Maize redistributes more throughfall at the maize intra-specific row and the maize and potato inter-specific, which is favorable for the synergistic effect of reducing soil erosion. This finding shows an important mechanism of maize and potato intercropping for soil and water conservation, and may promote the application of diverse cropping systems for sustainable agriculture in mountainous areas. | ZHANG Xiao-yun WU Kai-xian FULLEN Michael A WU Bo-zhi | 2020 | Journal of Mountain Science2020,17,2: | 4 |
| 6 | Climate change impact and adaptation on wheat yield, water use and water use efficiency at North Nile Delta显示文摘Investigation of climate change impacts on food security has become a global hot spot.Even so,efforts to mitigate these issues in arid regions have been insufficient.Thus,in this paper,further research is discussed based on data obtained from various crop and climate models.Two DSSATcrop models(CMs)(CERESWheat and N-Wheat)were calibrated with two wheat cultivars(Gemiza9 and Misr1).A baseline simulation(1981-2010)was compared with different scenarios of simulations using three Global Climate Models(GCMs)for the 2030s,2050s and 2080s.Probable impacts of climate change were assessed using the GCMs and CMs under the high emission Representative Concentration Pathway(RCP8.5).Results predicted decreased wheat grain yields by a mean of 8.7%,11.4%and 13.2%in the 2030s,2050s and 2080s,respectively,relative to the baseline yield.Negative impacts of climatic change are probable,despite some uncertainties within the GCMs(i.e.,2.1%,5.0%and 8.0%)and CMs(i.e.,2.2%,6.0%and 9.2%).Changing the planting date with a scenario of plus or minus 5 or 10 days from the common practice was assessed as a potentially effective adaptation option,which may partially offset the negative impacts of climate change.Delaying the sowing date by 10 days(from 20 November to 30 November)proved the optimum scenario and decreased further reduction in wheat yields resulting from climate change to 5.2%,6.8%and 8.5%in the 2030s,2050s and 2080s,respectively,compared with the 20 November scenario.The planting 5-days earlier scenario showed a decreased impact on climate change adaptation.However,the 10-days early planting scenario increased yield reduction under projected climate change.The cultivar Misr1 was more resistant to rising temperature than Gemiza9.Despite the negative impacts of projected climate change on wheat production,water use efficiency would slightly increase.The ensemble of multi-model estimated impacts and adaptation uncertainties of climate change can assist decision-makers in planning climate adaptation strategies. | Marwa Gamal Mohamed Ali Mahmoud Mohamed Ibrahim Ahmed El Baroudy Michael Fullen El-Said Hamad Omar Zheli Ding Ahmed Mohammed Saad Kheir | 2020 | Frontiers of Earth Science2020,14,3: | 2 |
| 7 | Phenotypic Heterogeneity among Tumorigenic Melanoma Cells from Patients that Is Reversible and Not Hierarchically Organized显示文摘 | Elsa Quintana Mark Shackleton Hannah R. Foster Douglas R. Fullen Michael S. Sabel Timothy M. Johnson Sean J. Morrison | 2010 | Cancer Cell2010,,5: | 1 |
| 8 | 云南省元阳县传统水稻梯田的农业土壤评价(英文)显示文摘作为元阳水稻梯田农业生态系统可持续性评价的一部分,本文调查了箐口流域梯地的自然生物环境,评价了农业土壤的土壤肥力,采用地质—地貌—土壤信息相结合的方法建立了土壤—景观之间的组合模式。研究确定了人为、气候、地形因素为影响土壤形成的主要因素,评价了土壤潜在生产力以及相关的限制因子,并根据FAO体系,确定并划分了主要的土壤类型。研究结果表明:土壤肥力的空间分布相当均一;土壤属酸性,阳离子代换量和养分储量总体较低;农业生态系统在较大程度上受哈尼群众人为活动的影响,成功维持了相对活跃的养分循环系统。目前的研究集中在:(1) 本研究区域在整个哈尼梯田系统中的代表性评价;(2) 田间水平上的养分循环研究;(3) 土壤特性对作物产量的影响;(4) 将田间水平的研究结果应用于更大的空间单元。 | Gilles COLINET Keiko KOULOS 吴伯志 李永梅 Daniel LACROIX1 苏友波 Jean CHAPELLE Michael A. FULLEN Trevor HOCKING Laurent BOCK | 2011 | Journal of Resources and Ecology2011,2,4: | 0 |
| 9 | Use of Multi-criteria Decision Analysis Methods for Water Supply Problems: A Framework for Improved Rainwater Harvesting显示文摘 | Omolara Lade David Oloke Ezekiel Chinyio Michael Fullen | 2012 | Journal of Environmental Science and Engineering(A)2012,1,7: | 0 |