在陕西关中平原较高水肥条件下,间作套种的产量、产值和产能分别比单作复种增加10—15%、14%和10%。间作套种,带型是关键。宽带型中有的无间套优势,有的优势甚小。模糊综合评判表明,窄带型中,小麦玉米两茬套种,2.5尺带较佳,小麦玉米和大豆三茬问套,3.5尺带最优。本文还讨论了影响小麦产量的边际效应,实播面积和玉米对带型反应的敏感性,以及间作大豆的光竞争等问题。 Under the conditions of higher water and fertilizer in the Guanzhong Plain of Shaanxi Province, the yield, output value and productivity of intercropping were increased by 10-15%, 14% and 10% respectively compared with that of single cropping. Intercropping, belt type is the key. Some of the advantages of broadband-type broadband, some very small advantage. Fuzzy comprehensive evaluation showed that the narrow-band wheat and wheat interplanted wheat, 2.5 feet better wheat wheat and soybean quilts asked sets, 3.5 feet with the best. The paper also discusses the marginal effects of wheat yield, the area under sowing and the sensitivity of maize to belt reactions, and the light competition in intercropped soybeans.