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采用海冰水(全盐含量为3‰)灌溉与井水灌溉对比,结合3种施肥措施:无机肥(传统施肥)、有机肥与无机肥配施、土壤调理剂与无机肥配施和不施肥处理,研究不同施肥条件下海冰水灌溉对土壤水分、棉花产量及水分利用效率的影响。结果表明:1)棉花整个生育期海冰水灌溉处理1m土层的土壤含水率均高于井水灌溉的处理,尤其在灌溉后0-40cm土层的土壤含水率差异显著,约为12个百分点。2)海冰水灌溉条件下,有机肥与无机肥配施、土壤调理剂与无机肥配施较传统无机肥处理均可显著提高盐碱地棉花籽棉产量,分别增产约10%、27%,井水灌溉处理也有相同的趋势,分别增产约12%、22%。3)无论井水或海冰水灌溉,有机肥与无机肥配施或土壤调理剂与无机肥配施均可显著提高棉花的水分利用效率,海冰水灌溉小区的棉花水分利用效率,两种施肥处理均高于传统无机肥处理,约为8%、30%。两种灌溉水源对棉花产量和水分利用效率均无显著影响。
Compared with well irrigation, sea ice water (full salt content of 3 ‰) irrigation and well water irrigation, combined with three kinds of fertilization measures: inorganic fertilizer (traditional fertilization), organic fertilizer and inorganic fertilizer, soil conditioner and inorganic fertilizer and not Fertilization treatment to study the effects of sea ice water irrigation on soil moisture, cotton yield and water use efficiency under different fertilization conditions. The results showed that: 1) The soil moisture of 1m soil layer during the whole growth period of cotton was higher than that of well water irrigation, especially in 0-40cm soil layer after irrigation, which was about 12 percentage point. 2) Under the conditions of sea ice water irrigation, the application of organic manure and inorganic fertilizer combined with soil conditioner and inorganic fertilizer could significantly increase the seed cotton yield of saline-alkali soil compared with traditional inorganic fertilizers, which increased by about 10% and 27% respectively, well water Irrigation also have the same trends, respectively, an increase of about 12%, 22%. 3) No matter well water or sea ice water irrigation, the combination of organic manure and inorganic fertilizer or the application of soil conditioner and inorganic fertilizer can significantly improve the water use efficiency of cotton, the water use efficiency of cotton in sea ice water irrigation area, Fertilization were higher than the traditional inorganic fertilizer treatment, about 8%, 30%. Both irrigation water sources had no significant effect on cotton yield and water use efficiency.