减源对不同类型玉米产量和穗部性状的影响

Effect of Altering Nutrition Supply on Yield and Ear Traits of Maize

选用4个玉米品种,在3种密度下,分别进行了对照、剪叶、断根和剪叶断根等处理,以研究对玉米穗 部性状和产量的影响。结果表明:处理对结实长、穗粒数、千粒重和产量的影响有相同的趋势,影响量大小依 次为剪叶断根>剪叶>断根>对照,且随密度的增加,影响量也随之增加。剪叶和断根对结实长度和穗粒数 的影响量有累加作用,对产量和千粒重的影响量累加作用不明显。在营养供给不足时,有限的营养优先供给 千粒重,千粒重、穗粒数分别是选育中穗品种和大穗品种的重要性状。

In order to study the effect of cutting leaves, cutting roots and cutting leaves and roots on the yield and ear traits, four maize varieties were used under three different densities. The results showed that there are same trend of the effect on fertile length, grains per ear, 1000-grain weight and yield from different treatments; the degree of the effect was as follow： cutting leaf and root〉 cutting leaf 〉 cutting root 〉 CK; the degree was increased with increasing density. The effect on fertile length and grains per ear had additive influence, but the effect on yield and 1000-grain weight wasn＇t significant among different treatments. Under low nutrition supply condition, 1000-grain weight was superior to getting the nutrition.