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| 1 | Characterization of Nitrogen Uptake Pattern in Malaysian Rice MR219 at Different Growth Stages Using ^(15)N Isotope显示文摘Nitrogen(N) use efficiency is usually less than 50%, and it remains a major problem in rice cultivation. Controlled release fertilizer(CRF) technology is one of the well-known efforts to overcome this problem. The efficiency of CRF, however, is very much dependent on the timing of nutrient release. This study was conducted to determine the precise time of N uptake by rice as a guideline to develop efficient CRF. Fertilizer N uptake by rice at different growth stages was investigated by using 15 N isotopic technique. Rice was planted in pots, with 15 N urea as N source at the rate of 120 kg/hm2. Potassium and phosphorus were applied at the same rate of 50 kg/hm2. Standard agronomic practices were employed throughout the growing periods. Rice plants were harvested every two weeks until maturation at the 14 th week and analyzed for total N and 15 N content. Nitrogen derived from fertilizer was calculated. Total N uptake in plants consistently increased until the 11 th week. After that, it started to plateau and finally declined. Moreover, N utilization by rice plants peaked at 50%, which occurred during the 11 th week after transplanting. N derived from fertilizer in rice plants were in the range of 18.7% to 40.0% in all plant tissues. The remaining N was derived from soil. Based on this study, N release from CRF should complete by the 11 th week after planting to ensure the maximum fertilizer N uptake by rice plants. Efficient CRF should contribute to higher N derived from fertilizer which also resulted in a higher total N uptake by rice plants, increasing the potential of rice to produce higher yield while at the same time of reducing loss. | Mohammad Mu'az HASHIM Mohd Khanif YUSOP Radziah OTHMAN Samsuri Abdul WAHID | 2015 | Rice science2015，22，5： | 3 |
| 2 | 有机氮肥对马来西亚沙捞越州酸性土壤玉米干物质产量及铵态氮和硝态氮含量的影响显示文摘腐殖质中的腐植酸和黄腐酸可以提高土壤中可交换性铵(NH4+)的回收率。这两种酸固定和保持NH4+的能力已经在许多研究中得到了证实,二者通过提高植株的光合作用速率、促进根系发育影响植物的生长和养分吸收。因此,本研究调查了这两种酸(液态)对玉米干物质产量、土壤铵态氮和硝态氮(NO3-)含量的影响。根据液态有机氮肥的组成,采用标准方法分离提纯腐植酸。有机氮肥在玉米种植后第10天、第28天分别施入盆栽土壤,然后在种植后第54天或孕穗期采集植株和土壤样品。土壤样品分析pH、铵态氮和硝态氮含量,植株样品测定干物质产量。结果表明,在酸性条件下,液态有机氮肥(黄腐酸、腐植酸或二者同时施用)的施用可以提高土壤中NH4+的累积量。随土壤活性碳储量的增加,腐植酸分子上羧基官能团对土壤NH4+的吸附能力增强。然而,酸含量较低时对干物质产量的影响明显减小。各处理间硝态氮的有效性没有达到统计上的差异显著水平。较低的pH值能抑制土壤硝化作用进程,同时降低土壤NO3-含量。这表明液态腐植酸和/或黄腐酸在提高尿素利用效率方面发挥着重要作用。然而,与腐植酸分子特性有关的作用机理还需要进一步详细研究。本研究为液态和叶面有机肥料的发展提供一定的依据。 | Susilawati Kasim Osumanu Haruna Ahmed Nik Muhamad Ab.Majid Mohd Khanif Yusop Mohamadu Boyie Jalloh 王艳群 孙志梅 | 2011 | 腐植酸2011，，2： | 2 |
| 3 | Sizing first flush pollutant loading of stormwater runoff in tropical urban catchments 显示文摘 | Chow Ming Fai Yusop Zulkifli | 2014 | Environmental Earth Sciences2014，72，10： | 1 |
| 4 | Influence of processing method and holding time on the physical and sensory qualities of cooked marinated chicken breast fillets 显示文摘 | YUSOP S M O'SULLIVAN M G KERRY J F | 2012 | LWT-Food Science and Technology2012，46，1： | 1 |
| 5 | Strategies for Infor- mation Communication and Technology (ICT) Adoption in Rural Areas显示文摘 | Ibrahim H Yusop NI Dahalin ZM etc | 2010 | PROCEEDINGS OF KNOWLEDGE MAN- AGEMENT 5TH INTERNATIONAL CONFERENCE2010，，： | 1 |
| 6 | Estimation of salttolerance in Andrographis paniculata accessions using multipleregression model显示文摘 | TALEI D VALDIANI A YUSOP M K | 2013 | Euphytica2013，189，： | 1 |
| 7 | Foreign direct investment and the pollution in five ASEAN Nations 显示文摘 | Merican Y Yusop Z Noor Z M | 2007 | Journal of Economics and Management2007，1，2： | 1 |
| 8 | Palladium-mediated intracellular chemistry 显示文摘 | YUSOP R M UNCITI-BROCETA A JOHANSSON E M V | 2011 | Nature2011，3，3： | 1 |
| 9 | Foreign Direct Investment, EconomicGrowth, and Financial Sector Development: A Comparative Analysis 显示文摘 | CHEE-KEONG CHOONG ZULKORNAIN YUSOP and SIEW - OHOO SOO | 2004 | ASEAN Economic Bulletin2004，21，3： | 1 |
| 10 | Foreign Direct Investment,Economic Growth,and Financial Sector Development:A Comparative Analysis显示文摘 | Yusop Sco | 2004 | ASEAN Economic Bulletin2004，，21： | 1 |
| 11 | Runoff quality and pollution loadings from a tropical urban catchment显示文摘 | YUSOP Z TAN L W UJANG Z | 2005 | Water Science and Technology2005，52，9： | 1 |
| 12 | Private capital flows, stock market and economic growth in developed and developing countries: a comparative analysis 显示文摘 | CHOONGChee- Keong BAHARUMSHAHAhmadZubaidi YUSOP Zulkornain HABIBULLAH Muzafar Shah | 2010 | Japan and the World Economy2010，22，： | 1 |
| 13 | Rainfall-runoff response and roles of soil moisture variations to the response in tropical rain forest, Bukit Tarek, Peninsular Malaysia显示文摘 | Noguchi S Nik A R Yusop Z | 1997 | Journal of Forest research1997，2，： | 1 |
| 14 | Foreign Direct Investment and the Pollution in Five ASEAN Nations 显示文摘 | Yesmine Mexican Zulkornaln Yusop Zaleha Mohd Noor and Law Siong Hook | 2007 | International Journal of Economics and Manage- ment2007，1，2： | 1 |
| 15 | Foreign direct investment,economic growth, and financial sector development:a comparative analysis显示文摘 | Choong C Yusop z Soo S | 2004 | Asian Economic Bulletin2004，，21： | 1 |
| 16 | Tetralin-glycerol as Solvent in Direct Liquefaction of Mukah Balingian Coal显示文摘 | ALI S N YUSOP M F ISMAIL K | 2014 | En ergy Proeedia2014，52，： | 1 |
| 17 | Impact of personal qualities and management skills of entrepreneurs on venture performance in Malaysia: Opportunity recognition skills as a mediating factor显示文摘 | Murali Sambasivan Mohani Abdul Yuzliani Yusop | 2009 | Technovation2009，，11： | 1 |
| 18 | Foreign Direct Investment and the Pollution in Five ASEAN Nations显示文摘 | Yasmine Merican Zulkornain Yusop Zaleha Mohd Noor and Law Siong Hook | 2007 | Journal of Economics and Management2007，，1： | 1 |
| 19 | Estimation of salt tolerance in Andrographis paniculata accessions using multiple regres- sion model显示文摘 | TALEI D VALDIANI A YUSOP M K | 2013 | Euphytica2013，189，： | 1 |
| 20 | Field emission properties of chemical vapor deposited indi- vidual graphene 显示文摘 | YUSOP M Z KALITA G YAAKOB Y | 2014 | Applied Physics Letters2014，104，93： | 1 |
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