Study on photosynthetic production and DMW on Bt-transgenic cotton, showed that the effective leaf area increase significantly, higher efficient leaf area compared with CK, the ratio of leaf DMW and area go up, the NAR increased.

• 对转基因抗虫棉杂交种的光合生产及干物质分配研究表明，转基因抗虫棉杂交种F1代种有效叶面积显著增多，高效叶面积大，比叶重和净同化率高，群体发展较合理，光合生产率高。