2008•Agricultural Science and TechnologyRequires access
Effects of Growth and Development and Grain Yield and Nitrogen Use Efficiency of Super Hybrid Late Rice under Different Cultivation Modes
Ma GuoHui
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Abstract
Effects of the growth and development and grain yield and nitrogen use efficiency on two different slow-release nitrogen fertilizer rate(equivalent to 0,180kg N/hm2,respectively)under four cultivation mode including in the experiment Optimized Cultivation Mode,Two Step Raising Seedling Cultivation Mode,Cast-transplanted Cultivation Mode and Conventional Cultivation Mode were studied.The results showed that Two Step Raising Seeding Cultivation Mode,compared with other cultivation mode,were quicker speed of tiller raising,more tillers,LAI,accumulations of dry matter,and higher nitrogen use efficiency and grain yield,but longer growth duration under the slow-release nitrogen fertilizer rate of 180kg/hm2(purified N).The second was Optimized Cultivation Mode,Cast-transplant Cultivation Mode was the last,and both of them had appropriate growth duration.Under 0kg/hm2 had the same results.As far as,the most appropriate cultivation mode for recommendation were Two Step Raising Seeding Cultivation Mode and Optimized Cultivation Mode..