不同种植密度对杂交大豆生理性状和产量的影响

Effects of Different Plant Densities on Physiological Traits and Yield of Hybrid Soybean

选用杂交大豆新品种杂交豆2号,设置5种密度试验,通过对其产量、产量因素、叶面积变化及干物质积累的研究,探讨杂交大豆的合理群体结构。研究表明：杂交豆2号在吉林省中部地区以17万~22万株/hm^2为宜,结荚期最大叶面积系数达6.06~6.47,光合生产率达8.80~9.90 g/m^2·d,鼓粒期叶面积系数仍维持在4.70~5.96,平均光合生产率达5.10~6.40 g/m^2·d,此群体下的产量达到3319.40~3416.70 kg/hm^2。

The new hybrid soybean, Hybsoy-2, was used to discuss the reasonable population structure of hy-brid soybean with 5 different density test by studying the yield, yield components, leaf area and dry matter accumula-tion. Results showed that the appropriate density of Hybsoy-2 was 170, 000 to 220, 000 plants/hm2 in the central re-gion of Jilin Province. The maximum leaf area index was up to 6.06~6.47 and the photosynthetic production ratewas 8.80~9.90 g/m^2·d at the pod stage. While the leaf area index was still remained at 4.70~5.96, and the averagephotosynthetic rate was 5.10~6.40 g/m^2·d at seed formation stage. The production with this density could reach3319.40~3416.70 kg/hm2.