不同生态条件下玉米的群体光合速率特性比较

Characteristic Comparison of Photosynthesis Rate of Maize under Different Ecologic Conditions

[目的]研究玉米在不同生态条件下的光合生产规律及特性。[方法]利用分期播种的方法,对山东品种玉米掖单22和新疆品种Sc704在新疆石河子的不同播期群体光合特征进行比较。[结果]结果表明,CAP的高值持续期,4月10日播期与4月25日播期为52 d,5月25日播期为43 d左右;各播期的CAP高值持续期均在大口至乳熟后期。[结论]Yd22的表观光合速率始终大于Sc704,具有较好的光合特性。

[ Objective] The research aimed to study the photosynthetic production rules and characteristics of maize under different ecologic conditions. [ Method ] This experiment used the method of sowing by stages to analyse and compare the CAP of maize varieties Yd22 and Sc704 with different sowing time at Shihezi. [ Result] The result showed that the high value of last time was about 52 d of sowing dates of April 10 and April 25, about 43 d when sowing dates was May 25. The last period of high CAP value of every sowing time was all at male tetrad to anaphase of maternity. [ Conclusion ] The leaf apparent photosynthetic rate of Yd22 was always higher than that of Sc704, and it had better photosynthetic characteristics.