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在山西省 15个试验站点 ,采用田间小区试验方法 ,对 30种间作套种组合种植模式进行了历时 6年的灌溉试验研究。结果表明 ,作物组合种植具有显著的节水增产效果 ,其单位耗水产量和产值分别可达到 1.2 5～ 2 .0 4kg/m3 和 1.2 5～ 2 .45元 /m3,较传统单作种植高 0 .0 8～ 0 .45kg/m3 和 0 .2 5～ 0 .6 5元 /m3。其节水增产的机理为 :间作套种作物需水高峰期不同步和相邻条带间根层土壤水分的相互调节 ,在一定程度上缓解了作物受旱程度 ;组合种植的局部灌溉明显地减少了作物棵间土壤表面无效蒸发量 ;利用作物间播期不同和生长期不同 ,通过适当的组合 ,实现了对光、热、水等资源的充分利用 ;作物条带种植时的边行增产效应
In 15 pilot sites in Shanxi Province, a field experiment was conducted to study the six-year irrigation experiment of 30 intercropping and interplanting combinations. The results showed that crop combination planting had significant water-saving and yield-increasing effect, and its unit water consumption and output value could reach 1.2 5 ~ 2.04 kg / m3 and 1.2 5 ~ 2.45 yuan / m3, respectively, 0 .0 8 ~ 0 .45kg / m3 and 0 .25 ~ 0 .6 5 yuan / m3. The mechanism of water-saving and yield-increasing is as follows: the inter-cropping of crops is not synchronous at the peak water demand and the mutual regulation of soil moisture in the root zone between adjacent bands, to a certain extent, alleviating the degree of drought in the crops; The crop evapotranspiration on the surface of the soil was invalid. By using different combinations of sowing dates and growing periods, adequate combinations of resources such as light, heat and water could be achieved through appropriate combination of crop yield increasing effects