大豆群体冠层结构及光合特性的研究  

Studies on Character of Canopy and Photosynthesis in Soybean Population

作　　者：刘建国[1] 李俊华[1] 张煜新[2] 董志新[1] 朱新在[1] 张继生[1] 

机构地区：[1]石河子大学新疆作物高产研究中心,新疆石河子832003 [2]石河子大学生物工程学院,新疆石河子832003

出　　处：《石河子大学学报（自然科学版）》2003年第3期188-190,共3页Journal of Shihezi University(Natural Science)

基　　金：国家自然科学基金(39860051)

摘　　要：采用北疆地区主栽春大豆品种,在适宜密度条件下于初荚期去叶疏荚改变粒叶比,探讨不同品种群体粒叶比与冠层结构和不同层次叶片的光合速率。结果表明:剪叶、疏荚处理后,叶面积指数(LAI)、消光系数降低,直射光透过率、散射光透过率增加,群体透光条件得到极大改善,其中LAI与群体消光系数之间呈极显著正相关(R=0.9966^(**)),同时,去叶疏荚处理后,在结荚期和鼓粒初期群体光合速率下降。灌浆后期,去1/3 叶和去1/2荚处理,群体光照条件改善,延缓了叶片的衰老,群体光合速率比对照增加,表明随着单位叶面积负荷量的增加,单位叶面积有效生产量随之增加,叶片光合生产潜力可以进一步发挥,光合产物有效性提高。To enhance canopy character and higher transmission coefficient for diffuse penetration and radiation penetration , higher leaf distribution and low coefficient extraction. The correlation between the leaf area index and coefficient extraction was very significant respectively ( R = 0. 9966 ) . By means of leaf-cutting and pod-thinning treatments, the CPA descent in podding period and early fulling, the community light shine onning the term improvement and defer the leaf's senile after removed 1/3 leafs and 1/2 pod,the CPA increased in filling period. It was clear that the photosynthetic potential could be fully played and the effectiveness of photosynthetic could be raised with the increase of unit-leaf-area load, which resulted in the rising of effective production per unit leaf area.

关 键 词：大豆 群体冠层结构 光合特性 光合速率 光合产物 

分 类 号：S565.1[农业科学—作物学] Q945.11[生物学—植物学]