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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/hm2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/m2·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/m2·d,此群体下的产量达到3319.40~3416.70 kg/hm2。
The hybrid soybean variety “Jiao Dou Dou No.2” was used to set up five kinds of density test. The reasonable population structure of hybrid soybean was studied through the study of its yield, yield, leaf area change and dry matter accumulation. The results showed that hybrid bean No.2 was suitable for 170,000-220,000 plants / hm2 in the central part of Jilin Province, the maximum leaf area coefficient was 6.06-6.47 at podding stage, photosynthetic rate was 8.80-9.90 g / m2 · d, The leaf area coefficient remained at 4.70 ~ 5.96 and the average photosynthetic rate reached 5.10 ~ 6.40 g / m2 · d. The yield of this group reached 3319.40 ~ 3416.70 kg / hm2.