稻田水旱轮作的生态经济效应研究

Studies on Effects of Ecology and Economy on Paddy-Upland Rotation

稻田水旱轮作研究表明 :水旱轮作改善了土壤的物理性状和化学性状 ,培肥了地力 ,改善了稻米品质。水旱轮作中综合效益表现最好的是轮作方式 1(紫云英—早玉米—晚玉米→紫云英—早稻—晚玉米→紫云英—早玉米—晚稻 ) ;其次为轮作方式 2 (紫云英—早稻—晚玉米→紫云英—早玉米—晚稻→紫云英—早玉米—晚玉米 ) ;再次为轮作方式 3(紫云英—早玉米—晚稻→紫云英—早玉米—晚玉米→紫云英—早稻—晚玉米 ) ;而连作效果最差。

The results of experiment showed : Paddy-upland rotation in rice fields ameliorates physical and chemical characters of soil.It enhances soil fertility and ameliorates the quality of rice protein. Comprehensive evaluation in ecological and economical benefits indicated that, the cropping pattern of Chinese milk vetch-spring corn-autumn corn→Chinese milk vetch-early rice-autumn corn→Chinese milk vetch-spring corn-late rice was the best one among the cropping systems studied, followed by the cropping pattern of Chinese milk vetch-early rice-autumn corn→Chinese milk vetch-spring corn-late rice→Chinese milk vetch-spring corn-autumn corn. The cropping pattern of Chinese milk vetch-spring corn-late rice→Chinese milk vetch-spring corn-autumn corn→Chinese milk vetch-early rice-autumn corn was rated the third. The cropping pattern of barely-rice-rice was the worst.