高产春大豆豆荚与叶片的光合性能研究

以黑农38等6个不同基因型大豆为材料,在鼓粒期对豆荚和叶片的面积在主茎上垂直分布、荚皮和叶片的叶绿素含量、光合速率等生理参数进行了研究.结果表明:高产春大豆在鼓粒期间荚面积为叶片面积的19.83%～35.44%,荚皮叶绿素含量为叶片的5.67%～8.20%,荚的真光合速率为叶片的13.32%～55.98%.黑农38的荚面积占叶面积百分比值、叶片的真光合速率均最高,分别为34.85%、26.4μmolCO_2·m~(-2)·s~(-1);豆荚的真光合速率以吉育67最高,为8.48μmolCO_2·m~(-2)·s~(-1),石豆2号最低,为2.24μmol CO_2·m~(-2)·s~(-1).荚的主要光合生理参数基因型之间的差异大.要进一步提高大豆产量,应发挥鼓粒期荚的光合潜力.

Photosynthetic Characteristics in Pod and Leaves of High-Yield Spring Soybean

Taking 6 high-yield soybean cultivars as material,the vertical distribution of pod and leaf area in stem,the physiological parameters of chlorophyll contents .photosynthetic rate( Pn) of pod and leaf in seed-filling period were investigated. Results indicated that the pod-area accounted 19. 83%-35.44% of the leaf-area,pod chlorophyll content and true photosynthetic rate accounted 5.67%-8.20% ,and 13. 32%-55.98%. Heinong 38 had highest ratio of pod-area to leaf-area and leaf true photosynthetic rate,which was 34. 85% and 26.4μmol CO_2·m~(-2)·s~(-1),respectively. For pod true photosynthetic rate.Jiyu 67 was highest of 8.48μmol CO_2·m~(-2)·s~(-1) ,and Shidou 2 was the lowest of 2.24μmol CO_2·m~(-2)·s~(-1). The photosynthetic parameters of soybean pod varied greatly among genotypes, and pod photosynthetic traits in seed-filling period had great potential in improving soybean yield.