The Effect of Planting Density on Yield and Its Components of Summer Maize in East Henan Province
To study the effect of planting density on yield and its components,4 main cultivated cultivars in east Henan Province were investigated respectively under 4 different production environments,adopting the method of randomized block test design.The results showed that the rate of empty stalk increased along with the increase of planting density,grain number per spike declined with the increase of density with a negative linear correlation,the effect of planting density on number of grains per ear was not significant and the results varied with different cultivars;the declining trend of 1000-grain weight was obvious along with the increase of density and a negative linear correlation existed;the grain yield increased first and then decreased with the density increasing;suitable planting densities were listed.'Denghai 605'was 60000-82500 plants/hm2,and the optimum density was 69102 plants/hm2;'Meijia 605'was 60000-75000 plants/hm2,and the optimum density was 72277 plants/hm2;'Zhongke 505'was 52500-67500 plants/hm2,and the optimum density was 60727 plants/hm2;'MY73'was 60000-82500 plants/hm2,and the optimum density was 72141 plants/hm2.
summer maizeplanting densityeast Henan Provinceyieldgrain number per spike1000-grain weight
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万方数据
