大豆灰斑病对大豆产量与品质的影响

采用不同病级病叶、荚、粒,研究了大豆灰斑病对大豆产量和品质的影响。结果表明,大豆灰斑病使大豆光合面积减少、呼吸消耗增加、植株净光合生产率下降,导致百粒重和产量降低;同时感病籽粒蛋白质相对含量随病级增加而上升,绝对含量则下降;脂肪的相对含量变化不大,绝对含量随病级增加而降低,并提出大豆灰斑病的防治方法。

Effect of frog-eye leaf spot on yield and quality of soybean

The effects of soybean frog-eye leaf spot on yield and quality were investigated with different disease degrees in leaf,pod and seed infection. The results showed that this disease reduced yield mainly due to the reduction of leaf area,increase of respiration and decline of net photosynthetic rate. However,studies indicated that there was a positive relationship between seed relative protein content and seed diseases infected degree, and there was no significant effect on fat content. Both absolute seed protein content and fat content were significantly affected by seed disease degree. Some measures for controlling the disease were also proposed.