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对庄浪县玉米全膜沟播种植密度研究的结果表明,当种植密度的边际产量大于零时,玉米的产量随密度的增大而增加,当种植密度的边际产量等于零时,玉米产量最高;种植密度的边际产量小于零时,玉米产量随密度的增大而减小。玉米的穗粒数、双穗率、百粒重随着种植密度的增加而逐渐减小,从拟合方程可知全膜玉米最高产量的适宜密度为6.096万株/hm2,最适宜宽行距为70cm,株距30cm或宽行距60cm,株距33cm。
The results of planting density study on corn sowing and tillage in Zhuanglang County showed that when the marginal yield of planting density was greater than zero, the yield of corn increased with the increase of density. When the marginal yield of planting density was equal to zero, the yield of corn was the highest. When the marginal yield of planting density is less than zero, the yield of corn decreases with the increasing of density. The grains per spike, the percentage of double spike and the weight of 100 grains of corn decreased with the increase of planting density. According to the fitting equation, the optimum density of the highest yield of full-film corn was 609600 plants / hm2 and the most suitable width was 70cm , Spacing 30cm or wide spacing 60cm, spacing 33cm.