黄淮海平原麦棉套种不同模式的小麦生理生态效应研究

Studies on the Physiological and Ecological Effects of Different Relay Intercropping Patterns of Wheat and Cotton in Huang-huai-hai plain

通过对麦棉套作不同模式的小麦生理生态效应的研究 ,发现小麦株高、根系数量、干物质积累、小麦根系活力等指标前期单作强于套作 ,后期套作优于单作 ;小麦光合速率单作强于套种 ;套作小麦产量与单作比 ,有优有劣 ,3∶1式增产 1 16 % ,3∶2式、 4∶2式、 6∶2式分别减产2 4 4 3% ,2 0 82 %、 18 5 2 %。 4种套作模式比较 ,各项指标以 3∶1表现最佳 ,其边际效应最好 ,补偿作用也最大 ,还有一定的增产效应。

The author studied wheat and cotton relay intercropping patterns of 3∶1,3∶2,4∶2,6∶2,and single cropping of wheat The results showed that: The root system,LAI,dry matter accumulation,root vitality,and photo synthetic rate of wheat intercropping were better than ones of single cropping in the last growth periods The stem and its wall of relay intercropping wheat were thickar than those of sole cropping wheat The yield of wheat under the pattern 3∶1 increased by 1 16% over sole cropping wheat But yields of other three types were decreased The decreased yield were 24 43%,20 82%,18 52%,respectively