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Effects of Nitrogenous Fertilizer Devise Strategies Mode on Grain filling

QIAN Zhao Guo et al . (Agricultural Research Institute of Taian,Taian, Shan Dong 271000,China)  
It is indicated that different top application stage and ratio have influences on grain weight。While the fundamental reason of effects is that average grain filling speed,especially the maximal grain filling speed and grain filling intensity of slow increasing period changes greatly。In the summary,applying 2/3 of N fertilizer at jointing stage and 1/3 at gestating stage by means of top application can increase average grain filling ratio,prolong slow increasing period appropriately and accumulate grain filling rate.So grain weight is increased last.
【CateGory Index】: S512.106
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