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采取裂区试验设计,研究不同种植密度对宁夏春小麦新品种(系)群体结构及产量的影响,以期筛选最佳种植密度。结果表明,叶面积系数、茎蘖数及产量随种植密度的增加而增加,在一定密度时达到最大值,种植密度再增加,叶面积系数、茎蘖数及产量出现下降趋势;在低种植密度时更有利于千粒重、穗粒数的增加;有效穗数各品种(系)受品种特性影响随密度梯度的增加表现不一;种植密度的变化对产量的影响虽未达到显著水平,但表现出规律性变化;宁春4号、宁春51号和宁春52号推荐在450万株/hm2或稍高密度下种植,永1937、宁春50号推荐在540万株/hm2密度下种植。
The split-plot experiment design was adopted to study the effects of different planting densities on the population structure and yield of spring wheat varieties (lines) in Ningxia with a view to screening the optimal planting density. The results showed that the leaf area coefficient, tiller number and yield increased with the increase of planting density, reached the maximum at a certain density, and then increased with increasing planting density, leaf area coefficient, tiller number and yield decreased. At low planting density The effect of grain yield per panicle was more favorable for the increase of 1000-grain weight and spike grain number. The effect of variety characteristics on panicle number varied with the increase of density gradient. Although the effect of planting density on yield did not reach significant level, Regularity changes: Ningchun No. 4, Ningchun No. 51 and Ningchun No. 52 are recommended to be planted at 4.5 million plants / hm 2 or slightly higher density. Yong 1937 and Ningchun 50 are recommended to be planted at the density of 5.4 million plants / hm 2.