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以郧单1号在肥力中等地上试验,设①前(苗)后(穗粒)期重施,中期控;②前中后三期施;③前中两期施三个处理,折合亩施纯氮23.9斤。结果:处理1亩产1121.6斤,比处理2、3增产8.4％、42.26％;平均每斤纯氮产玉类46.9斤,比处理2、3多4.5斤、14.1斤。增产原因:前期重施,玉米在拔节前已形成较大的根系和叶面积系数:中期控肥不仅基部节间缩短、坚硬,根系发育好,抗倒力增强,而且生殖生
Yun-1 in medium fertility moderate test, set ① before (seed) after the re-Shi, mid-term control; ② before and after the three Shi; before and after two Shi Shi three treatments, equivalent to Mushi Pure nitrogen 23.9 kg. Results: The yield of 1 mu per mu was 1121.6 kg, increased by 8.4% and 42.26% respectively compared with that of treatment 2 and 3; the average yield per kilogram of pure nitrogen was 46.9 kg, which was 4.5 and 14.1 kg more than that of 2 and 3 respectively. Yield reasons: early re-application, maize before jointing has formed a larger root and leaf area coefficient: medium-term control of fat not only shortening basal internodes, hard, good root development, increased anti-captive, and reproductive growth