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1996～ 1 997年在江苏省东辛农场和黄海农场通过田间试验研究了不同叶龄施用穗肥对夏玉米群体质量及产量的影响效应 ,结果表明 :6～ 1 4叶期公顷施 1 80kg纯氮作穗肥可显著提高吐丝以后群体干物质的生产积累量 ;降低空秆率、提高中后期群体有效叶指和高效叶指 ;在叶面积适宜的基础上提高粒 /叶和粒重 /叶值 ;增加茎粗系数、促进茎秆充实、提高茎鞘干重 ;增加气生根数量和重量 ;改善穗部性状、增加每穗粒数、提高百粒重 ;显著提高产量
In 1996 ~ 1997 in East Jiangsu Province, Xin farm and the Yellow Sea farm field experiments were conducted to study the application of different leaf age panicle on summer maize population quality and yield effects, the results show that: 6 ~ 14 leaf hectare Shi 80kg pure Nitrogen as a panicle fertilizer can significantly increase the accumulation of dry matter in the population after silking; reduce the empty stalk rate and improve the effective leaf index and efficient leaf index of the population in the middle and late stages; improve grain / leaf and grain weight / Leaf value; increase the stem diameter coefficient, promote the stalk filling, increase the dry weight of stems and sheaths; increase the number and weight of aerial roots; improve ear traits, increase the number of grains per panicle, increase the weight of 100 grains;