摘要
本试验研究了种植密度在产量构成中的作用。种植密度适宜时子实产量较高。密度与肥力间存在着高肥力宜密、适宜的密度范围较宽,低肥力宜稀、适宜的密度范围较窄的关系。当种植株数超过适宜密度范围的上限时,植株的生育受到阻碍,表现出叶速度慢、吐丝期延迟、雌穗小花数减少,败育粒数增多。这些现象在高肥条件下主要是光照不足造成的,在低肥条件下主要是肥力不足造成的。从丰产稳产出发,大面积生产上的种植密度,应在合理密度范围内选取中值或低值。
This article indicate that high grain yicld of maize were given by satisfactory piant density(in certain iocation).The higher density with larger range of suitable plant densities were allowed at rich soil,andlower density with smaller range at poor soil.Increasing plant densityover the max.limit of suitable density slowed down leaf elongation,delayed silking,increased the percentage of defective kernels and decreasedfloweret number/ear,then plant development were restrained.These werecaused by weakly light at the high fertilizer condition and by the lacknessof fertilizer on the poor soil.In the light of these experimental results,the mid or lower suitableplant density for the high yield of maize in large area should be selected.
出处
《东北农业科学》
1987年第1期12-17,共6页
Journal of Northeast Agricultural Sciences
