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为了研究干旱牧区利用雨水灌溉青贮玉米的可行性,在不同的坡度上布置产流区向下方汇水,形成雨水叠加以增加下方土壤储蓄的雨水,从而增加常量提高雨水利用效率。研究结果表明,5°坡面和12°坡面径流区的集水效率分别为82.5%和87.3%;12°坡面上青贮玉米的长势、产量和水利用效率较5°坡面的高,12°坡面和5°坡面上的青贮玉米的平均株高为71.8和34.1cm,平均产量为18.6和0.63t/hm2,水利用效率分别为126.41和44.23kg/(hm2.mm)。研究结果可为在干旱牧区利用雨水叠加措施种植青贮玉米提供理论参考。
In order to study the feasibility of rainwater irrigation of silage maize in arid and pastoral area, runoff was arranged on different slopes to collect water to the bottom, and rainwater superposition was formed to increase rainwater stored below the soil so as to increase the constant and improve the rainwater utilization efficiency. The results showed that the catchment efficiencies of 5 ° slope and 12 ° slope runoff were 82.5% and 87.3% respectively. The growth, yield and water use efficiency of silage corn on 12 ° slope were higher than those on 5 ° slope, The average plant height of silage corn on 12 ° and 5 ° slopes was 71.8 and 34.1 cm with average yields of 18.6 and 0.63 t / hm2, respectively, with water use efficiencies of 126.41 and 44.23 kg / (hm2.mm), respectively. The results can provide a theoretical reference for planting silage corn in the arid pastoral area by using rain water superposition method.