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为了探究元谋干热河谷区旱地农田水分生产情况,在典型旱地布置玉米-小麦田间试验,比较不同覆盖保水栽培措施的水分效应。结果表明,秸秆和地膜覆盖都具有保水作用,且地膜秸秆两元覆盖方式的保水效果尤其明显,且0~30 cm土壤水分变化较为活跃,30~60 cm土壤水分变化相对稳定,60~100 cm土壤水分变化最为稳定;土壤贮水、蓄水情况为处理Ⅰ<处理Ⅱ<处理Ⅲ<处理Ⅳ,全年耗水强度处理Ⅰ>处理Ⅱ>处理Ⅲ>处理Ⅳ,综合分析不同覆盖措施保水增产效果,为西南干热河谷区旱作农业合理应用覆盖栽培技术提供理论参考和实践指导。
In order to explore the situation of dryland farmland water production in Yuanmou dry-hot valley, the corn-wheat field experiment was arranged in a typical dry farmland to compare the water effects of different measures of covering water conservation. The results showed that both straw and plastic film mulching had the effect of water retention, and the mulching pattern with mulching straw was especially effective. The changes of soil moisture in 0 ~ 30 cm soil layer were more active, and the changes of soil moisture in 30 ~ 60 cm soil layer were relatively stable, 60 ~ 100 cm Soil water storage and storage conditions were the most stable, soil water storage and water storage were treatment Ⅰ treatment Ⅱ> treatment Ⅲ> treatment Ⅳ, and comprehensively analyzed the effects of different covering measures Effect, provide theoretical reference and practical guidance for the reasonable application of cover cultivation techniques for dry farming in dry-hot valley of Southwest China.