摘要： 以桐麦间作系统中的关键因子-光合有效辐射为焦点，分析树冠遮荫对间作小麦光合有效辐射和产量的影响，以探讨桐麦间作系统中的光能利用规律。结果表明，南北行向的桐麦间作，在距树行不同距离和泡桐不同生长期间，树冠遮荫对小麦光合有效辐射的影响差异较大，距树行越近或泡桐叶面积指数越大，光合有效辐射减少率也越大；树冠遮荫对小麦有效穗数和穗粒数无显著影响，对千粒重和单产影响显著，其影响程度因距树行距离不同而有差异。

关键词: 小麦, 泡桐, 间作, 光合有效辐射, 产量

Abstract: The effect of crown shading on the photosynthetically active radiation(PAR)and yield of wheat was analysed focusing on the PARkey factor of paulownia/wheat inter cropping system,and the law of light energy utilization was detected.Results showedthat under a northsouth tree row the crown shading affected PAR differently with differentdistances from tree row and different growth periods of paulownia trees.Crown shading hadno significant effect on the number of effectivel ears and kernels of wheat,but it significantlyaffected total grain weight and 1000grain weight,and its affected degree was differentdepending on the distances from tree row.

Key words: Paulownia/wheat intercropping, Photosynthetically active radiation(PAR), Wheat yield

中图分类号: 

• S512.1