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在农牧交错带研究了向日葵与马铃薯、向日葵与蚕豆2种间作模式下作物的水分吸收和利用特征,以向日葵、马铃薯、蚕豆单作为对照,测定并分析了间作作物生育期内0140 cm土层土壤水分含量及作物产量.量化了不同间作模式下土地当量比(LER)、水分当量比(WER)、农田蒸散量(ET)和水分利用效率(WUE).结果表明:向日葵与马铃薯间作和向日葵与蚕豆间作均能提高作物产量和土地生产力,具有间作优势,向日葵与马铃薯间作更有优势.间作种植可增加作物耗水量,能使作物利用深层水分,对耗水量大的作物有优势.向日葵与豆科和非豆科作物间作均可有效提高高秆作物向日葵的水分利用效率,较单作向日葵提高了27.1％28.8％,向日葵与蚕豆间作比向日葵与马铃薯间作更具有水分利用优势.“,”The paper researched moisture absorption and utilization of crop in two kinds of intercropping patterns in agro-pastoral ecotone, including sunflower/potato and sunflower/fababean. Compared to monoculture sunflower, potato and fababean, we measured and analyzed soil water content from 0 to 140 cm soil layer and crop yield of intercropping crops in growth period, and quantified land equivalent ratio( LER), water use equivalent ratio( WER), evapotranspiration( ET) and water use efficiency( WUE) of different intercropping systems. The results showed that sunflower/potato and sunflower/fababean intercropping patterns can both improve the yield of intercropping and land productivity with intercropping advantage, and sunflower/potato pattern has more significant intercropping advantage. Intercropping can increase crop water consumption and make crops use deep water, which has an advantage over water-consuming crops. Sunflower/potato and sunflower/fababean patterns can both effectively improve water use efficiency of high-stem crop sunflower, with anincrease of 27. 1％-28. 8％ compared with monoculture sunflower, and sunflower/fababean pattern has more advantages of water use than sunflower/potato pattern.