种植密度对夏高粱生长发育及产量的影响

Effect of Planting Density on Growth and Yield of Summer Sorghum

以夏播高粱晋杂30号为材料,在大田试验条件下,研究6个种植密度(11.25万,13.50万,15.75万,18.00万,20.25万,22.50万株/hm^2)对晋杂30号生长发育及产量的影响。结果表明,晋杂30号的株高随着种植密度的增加而增加,茎粗反而减小,叶面积指数在15.75万株/hm^2的种植密度下达到峰值;晋杂30号的产量随着种植密度的增加呈现先增加后降低的趋势,在15.75万株/hm^2种植密度下产量达到最高。研究表明,种植密度过高或过低都不利于晋杂30号生长发育与产量的最终形成,15.75万株/hm^2是晋杂30号高粱的最佳种植密度。

With the summer sowing sorghum Jinza 30 as material, the paper studied the effect of six planting densities（112 500,135 000, 157 500, 180 000, 202 500, 225 000 plants/hm2）on the growth and yield of Jinza 30 in the field experiment environment. The result showed that the plant height of Jinza 30 increased with the increase of the planting densities, and the stem diameter decreased, but the leaf area index reached the highest under the planting density of 157 500 plants/hm2. The yield of Jinza 30 increased firstly and then decreased with the increase of planting density, reaching the highest at 157 500 plants/hm2. The results showed that too high or too low planting density was not conducive to the ultimate development of the Jinza 30 growth and yield. Planting density of 157 500 plants/hm2 is the optimum planting density of Jinza 30 sorghum.