河西灌区啤酒大麦保护性耕作技术试验研究

The Effects of Conservative Tillage Techniques on Malting Barley Yield and on Soil Moisture and Erosion in Hexi Region,Gansu

在甘肃省八一农场（金昌市）机播条件下，对免耕高留茬、免耕秸秆覆盖、免耕秸秆覆盖加播前耙耱、传统耕作等4种耕作方式进行了试验研究。结果表明，3种保护性耕作方式与传统耕作的大麦产量无明显差异，但保护性耕作能有效保持土壤水分，减少土壤风蚀，节约生产成本，3种处理的纯收益比传统耕作处理增加448．1～509．1元／hm^2，社会效益和经济效益显著。

The effects of several conservative tillage techniques were studied in Bayi farm. The experimental results displayed that no-tillage with standing stubble,no-tillage with straw mulching, and no-tillage with straw mulching and harrowing before sowing did not affected barley yield significantly compared to conversion tillage system. However, soil moisture condition was better and soil erosion was reduced under the selected conservative tillage systems than the conversion tillage system. Economical efficiency was increased by 387. 6-507. 9 RMB/hm^2 because the conservative tillage systems reduced cost for machine operation.