摘要
以常规平作为对照,探讨了贵州岩溶易旱区玉米在不同耕作覆盖方式下的产量及水分利用效率。试验结果表明:无论哪种耕作覆盖方式,玉米不同生育期的耗水规律与平作不覆盖是基本一致的;秸秆、地膜覆盖可减少棵间土壤蒸发,总体耗水量有所减少;垄作覆膜、垄作秸秆覆盖可使玉米产量大幅度提高,水分利用率也相应提高;垄作比平作有较明显的增产节水效果。因此,垄作地膜覆盖,垄作秸秆覆盖及单纯垄作在贵州岩溶易旱区是提高作物降水利用率及水分利用效率的主要途径。
With conventional cultivation as contrast, the yield and water use efficiency of maize under different cultivation and mulching patterns were studied in Kast liable-drought region of Guizhou. The results showed that the law of water consumption of various cultivation and mulching patterns was in correspondence with that of the contrast. The straw mulching and plastic mulching, on some degree, could reduce both the water evaporation and the total water consumption. The plastic mulching and straw mulching with seeding in ridge could increase remarkably the yield and water use efficiency of maize. Compared with the conventional cultivation, the ridge cultivation could increase obviously the yield and reduce the water consumption. Therefore, ridge cultivation, and plastic mulching and straw mulching with seeding in ridge are effective ways to raise water use efficiency and rainfall use efficiency of crops in the Kast liable-drought regions.
出处
《干旱地区农业研究》
CSCD
北大核心
2004年第1期73-75,101,共4页
Agricultural Research in the Arid Areas
基金
国家重点科技攻关"贵州喀斯特地区水资源保护与高效利用技术开发与示范"项目(90-021-03-06)
关键词
玉米
产量
水分利用率
耕作方式
覆盖方式
maize
yield
water use efficiency
Kast liable-drought region
