2005•Journal of Jinling Institute of TechnologyRequires access
Influence of Nitrogen Application Amount on Yield, Quality and Effect of Rice under Shed Protection Field
XU Shao-an
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Abstract
Late ripen mid-season rice Tong Yu Jing 1 was used as material to study the influence of nitrogen application amount on yield, quality and effect of rice under shed protection field. The results showed that the yield was highest with the nitrogen level of 150 kg/hm2. Compared with no nitrogen application, the yield increased 26.60% ; With nitrogen application amount between 75150 kg/hm2; grain had better milling quality; using nitrogen could reduce grain chalky percentage, amylose content, and enhance protein content. Net profit with nitrogen level of 150 kg/hm2 was largest (13.91 % ), while margin cost reward rates and nitrogen agronomic efficiency with nitrogen level of 75 kg/hm2 was highest.