玉米间作豌豆水分利用效率对供水水平和种植密度的响应

The Responses of WUE to Irrigation and Plant Density Level under Maize Pea Intercropping

在河西绿洲灌区进行大田试验,研究低、中、高3个供水水平(4 050、4 500、4 950m3/hm2)与玉米密度(5.25、6.0、6.75万株/hm2)处理下玉米间作豌豆的产量和水分利用效率(WUE)。结果表明,在同等种植密度下,玉米间作豌豆总产量及间作组分产量均随供水水平提高,呈显著增加趋势,中种植密度高供水水平处理下达到最大值;在同等种植密度下,玉米间作豌豆耗水量随供水量增加呈显著增加趋势,中、高种植密度处理在供水水平提高时,耗水量的增幅显著下降,高种植密度处理中下降最为显著;中种植密度与中供水水平处理组合可最大限度地提高豌豆间作玉米的WUE,可达到2.24kg/m3。

A field experiment was carried out to investigate the yield and water use efficiency （WUE） of maizepea intercropping under different levels of irrigation and plant density in an oasis irrigation area. The results showed that： at the same plant density level, the total yield and the components were increased significantly with increasing irrigation level, the total yield got the maximum under the me- dium plant density adding high irrigation level. At the same plant density level, water consumption was increased significantly with increasing irrigation level. With the irrigation level increasing, the in- crease rate of water consumption under the medium and high plant density level was decreased signifi-cantly, the decreasing under high plant density level was the most. The WUE of maize-pea intercropping under the medium plant density adding medium irrigation level got the maximum 2.24 kg/m^3.