• 研究报告 •
ZHAO Yu-xin, LU Jiao-yun, YANG Hui-min
Abstract: A field study was conducted to investigate the influences of no-tillage, stubble retention and crop type on weed density, species composition and community feature in a rotation system (winter wheatcommon vetchmaize) established 12 years ago on the Loess Plateau of eastern Gansu. This study showed that the weed species composition, density and community feature varied with the change of crop phases. Notillage practice increased the weed density at maize phase, while rotation with common vetch decreased the density in the notillage field. Stubble retention reduced the weed density under maize phase and the lowest density was observed in the notillage plus stubble retention field. Notillage practice significantly increased the weed species diversity under winter wheat phase and decreased the diversity under common vetch phase. At maize phase, a greater species diversity index was observed in the notillage field. These results suggested that no-tillage practice and stubble retention possibly suppress specific weeds with the presence of some crops and crop rotation is a vital way to controlling weeds in a farming system.
赵玉信,陆姣云,杨惠敏**. 保护性耕作对陇东黄土高原轮作田杂草的影响[J]. 应用生态学报.
ZHAO Yu-xin, LU Jiao-yun, YANG Hui-min. Effect of conservation tillage on weeds in a rotation system on the Loess Plateau of eastern Gansu, Northwest China.[J]. Chinese Journal of Applied Ecology.