华北平原膜下滴灌棉花水分利用效率及产量对供水方式响应研究

Influence of irrigation modes on water consumption and yield of cotton with drip irrigation under plastic mulch in North China Plain

通过田间试验,系统地分析了膜下滴灌条件下,棉花干播湿出、湿播湿出处理与传统灌溉处理的水分利用差异。结果表明:膜下滴灌与传统灌溉相比,可以降低株高、减少蕾铃脱落和使根系集中。普通膜下滴灌处理比传统灌溉处理增产204.15 kg/hm2,总耗水量减少32.91 mm,水分利用效率增加0.73 kg/(mm.hm2)。干播湿出处理产量虽然不是最高,但是其灌溉量比其他两处理减少30%以上,水分利用效率最高,干播湿出具有一定的推广价值。

The field experiment was carried out to evaluate the effects of dry sowing wet germination （DSWG） wet sowing wet germination （WSWG） with drip irrigation under plastic mulch, and traditional flooding irrigation （TFI） on water use efficiency of cotton. The results showed： compared with traditional irrigation, drip irrigation under plastic mulch could reduce the height of cotton, lessen the number of cast bolls and centralize the root system. The yield of drip irrigation was 204.15 kg/hm^2 higher than that traditional irrigation, the amount of water consumption was reduced by 32.91 mm, and the water use efficiency was increased by 0.73 kg/（mm·hm^2）. Even though the yield of dry sowing and wet germination was not the highest, its water consumption was decreased by more than 30% compared to the other two treatments, and its water use efficiency was the highest. So dry sowing wet germination was worthy to be popularized in this region.