通过田间小区试验,研究了不同施肥模式对马铃薯-春玉米-大白菜轮作体系产量和经济效益的影响.结果表明:将春玉米季的100%磷钾肥前移到马铃薯季施用的优化施肥模式(OPT3),在节肥省工的基础上,产量和经济效益最高;与农民习惯施肥相比,马铃薯季增产6.15%,春玉米略有减产,但差异不显著,大白菜季增产6.85%,周年增加经济效益9759.42元/hm2.因此,将春玉米季100%磷钾肥前移到马铃薯季施用为马铃薯-玉米-大白菜轮作体系上最优的施肥技术.%Field plot experiment was carried out to study the effects of different fertilization modes on the yield and economic benefit of crops in potato-spring maize-Chinese cabbage rotation system. The results showed that the optimized fertilization mode OPT3(transferring the whole phosphorus and potassium fertilizer for spring maize to the production of potato)could not only save labor and fertilizer,but also acquire the highest yield and economic benefit. In comparison with the farmer's fertilization method, the optimized fertilization mode OPT3 enhanced potato yield by 6.15%,slightly decreased spring maize yield (P>0.05),in-creased Chinese cabbage yield by 6.85%,and improved the annual economic benefit by 9759.42 yuan/hm2. So transferring the whole phosphorus and potassium fertilizer for spring maize to potato production was the optimal fertilization method for potato-spring maize-Chinese cabbage rotation system.
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