3个高淀粉玉米新品种适宜种植密度的研究

Studies on Suitable Planting Densities of Three High Starch Maize Varieties

研究了3个高淀粉玉米新品种在中等肥水条件下5个种植密度与产量的关系。结果表明:密度对产量的影响达极显著水平,高产栽培时应选用种植密度为5.5万￣6万株/hm 2,吉单79、吉单137和吉单264获得最高产量的适宜种植密度分别为5.51万株/hm 2、5.43万株/hm 2和5.71万株/hm 2。初步探讨种植密度对子粒品质的影响,提出在生产上可采用适宜密度的下限,以求高产稳产;采用最佳密度,以求达到最高单产。

Three high starch new maize varieties were Planted at five planting densities under medium fertility condition for studying the relationship between yield and density. The results indicated that the density has significant effect on the yield of maize. A density of 55000-60000 plants per hectare should be adopted in high yield growing system. The maximum yield of ＂Jidan 79＂, ＂Jidan 137＂ and ＂Jidan 264＂was achieved when they were planted at densities of 55100, 54300 and 57100 plants per hectare respectively. The effect of density on the quality of maize grains was also analyzed. For getting high and steady yield, it was recommended that the lowest limit of suitable densities should be used. High yield per hectare can be achieved only when the maize were planted at proper density.