沟垄种植方式下的燕麦产量和水分利用效率

以‘定莜1号’为试材,设置3种集雨处理,即平地种植(T1)、沟垄不覆膜种植(T2)、沟垄覆膜种植(T3),测定了不同生育期土壤的水分、出苗率、叶面积指数、产量等主要指标.结果表明:T3处理的燕麦出苗率最高,为72.5%,叶面积指数显著高于T1和T2处理(P<0.05),T1和T2之间差异不显著(P>0.05),T3处理的燕麦耗水量为190.4mm介于T1和T2处理之间,但是产量和水分利用效率为各处理中最高,分别为1 745.5kg/hm2和9.1kg/(mm.hm2).沟垄覆膜处理是一种耗水量较小,产量和水分利用效率最高的集雨种植模式.

The study of ridge and furrow planting mode on yield and water use efficiency of oats

Experiments were conducted using the 'Dingyou 1 'oat as test material in Dingxi City,Gansu Province in 2010.Three treatments of ridge-furrow rain-harvesting mode were designed,namely flat planting(T1),ridge-furrow without plastic mulch planting(T2) and ridge-furrow with plastic mulch planting(T3).Soil moisture,emergence rate,leaf area index and yield were determined.The results showed that the treatment T3 had the highest emergence rate which reached 72.5%,and the leaf area index significantly higher than that of T1 and T2 treatment(P<0.05).There was no difference between T1 and T2(P>0.05).The water consumption of T3 reached 190.4 mm,and the yield and water use efficiency reached 1 745.5 kg/hm2 and 9.1 kg/mm·hm2 which were significantly higher than those of other treatments.Overall,rainwater-collecting mode is the best mode with lower water consumption,the highest yield and water use efficiency.