种植密度对玉米商品品质的影响

Effect of Planting Density on the Commodity Quality of Maize

通过对吉林省目前市场上销售的8个玉米品种,在5个种植密度下,即每公顷3.0万株、4.5万株、6.0万株、7.5万株、9.0万株,研究种植密度对玉米商品品质的影响。结果表明,随种植密度增加容重变化因品种而异,在稀植3.0万株/hm2条件下,子粒容重较高密度条件下有降低趋势;种植密度增加子粒体积缩小,不同品种子粒体积随密度增加而减小的程度不同;随种植密度增加,子粒充实度降低(吉单79),个别品种子粒充实度反而有增大的趋势(吉单27),随密度增加子粒充实度变化情况因品种而异。

Eight maize varieties in the market of Jilin Province were selected and they were grown at five planting density to study effect of planting density on the commodity quality, i.e., 30000, 45000, 60000, 75000, and 90000 plants per hectare. The results showed that with the increase of planting density bulk density changed differently according to varieties. Bulk density of maize seed at 30000 plants/ha decreased compared with higher density. Grain volume decreased as the planting density increased, but the changes varied with different varieties. The grain plumpness reduced as the planting density increased, such as ＇Jidan 79＇. Also, the changes varied with different varieties. Grain plumpness of few varieties tends to increased as the planting density increased, such as ＇Jidan 27＇.