| Based on the field experiment combined the investigation from farmers, the comprehensive evaluation method was used to analyze the benefits of 7 crop rotation patterns under conservation tillage with permanent raised bed in Hexi corridor of Gansu Province. The results showed: the economic benefit of wheat–sweet pepper–maize was the best, whose net income, output/input ratio and output value per cubic meter of irrigation water were 1.52×104 yuan·hm-2, 2.00 and 5.39 yuan·m-3, respectively; the labor productivity of wheat-barley-wheat was the highest, being 240.2 yuan·person-1·a-1, and it’s social benefit was also the best among all the rotation patterns; and the ecological benefit of wheat–oil sunflower–wheat was the best, whose guarantee degree of regional water resource, energy production efficiency of water and use efficiency
of heat energy were 1.83, 2.07×104 kJ·m-3 and 66.12%, respectively. According to comprehensive benefits, the four rotation patterns of wheat-sweet pepper-maize, wheat-potato-wheat, wheat-maize-maize and wheat-coniferous pea-wheat were relatively good. Considering the stability maintenance of agricultural system, wheat-sweet pepper-maize, wheat-maize-maize and wheat-coniferous pea-wheat were the suitable rotation patterns for conservation agriculture with permanent raised bed. |