Abstract: The study was carried out in 1987-1990 at CNRRI Farm, two new cropping pattern "Barley/Watermelon+Corn-Rice" and "Milk vetch+Barley/Watermelon+Corn-Rice" increased grain yield by 99.2 and 296.2 kg/mu, and raised sun light utilization efficiency by 0.145% and 0.159% in comparison with the "Barley/Watermelon-Rice" and "Watermelon-Rice", respectivaly. The after-effects of upland, lowland crop to the yield of second crop of rice were also analysed.

Key words: Cash crop, Cropping pattern, Grain crop, Paddy field

摘要： 通过1987～1990年稻田粮经型新复种方式对比试验结果，表明了新复种方式大麦／西瓜+玉米-稻和绿肥+大麦／西瓜-稻分别比原复种方式大麦／西瓜-稻和西瓜-稻亩增粮食99.2和296.2 kg， 增收25.11元和49.93元， 提高光能利用事0.145%和0.596%。同时，分析了水、旱作茬口对晚稻的增产后效。

关键词: 复种, 稻田, 经济作物, 粮食作物