豫西地区种植密度对洛玉8号产量及农艺性状的影响

通过对玉米新品种洛玉8号在不同种植密度下的产量及产量构成因素的分析,得出洛玉8号在豫西种植的最佳密度。结果表明:随着密度的增加,夏玉米单株叶面积先增加后减小,而LAI则持续增加。在7.50万株/hm2密度条件下群体叶面积持续时间较长,有利于叶片光合的进行,单株玉米干物重随密度增加单株干物重减小。洛玉8号在7.50万株/hm2密度条件下灌浆速度最快,在8.25万株/hm2密度条件下灌浆速率最慢。通过产量分析得出洛玉8号在豫西的理论最佳种植密度为104483.55株/hm2。

Influence of Planting Density on Yield and Agronomic Traits of Luoyu No. 8 in Western Region of Henan

In order to obtain the optimum planting density of summer maize new variety Luoyu No. 8 in western region of Henan province, the author studied and analyzed the yield and yield components of this variety under different planting densities. The results indicated that： when planting density increased, the single - plant leaf area of Luoyu No. 8 increased first and then de- creased, but its LAI increased continuously. Under the planting density of 75000 plants/hm2, the population leaf area was at a high level for crease in advantageous to the photosynthesis of leaves. The dry matter weight per plant decreased with the in- seed - filling speed of Luoyu No. 8 was the highest under 75000 plants/hm2, and was the lowest un- der 82500 plants/hm2. Through yield analysis, it was concluded that the theoretical optimum planting density of Luoyu No. 8 in western region of Henan was 104483.55 plants/hm2.