中文摘要：

为了充分利用浅层地下咸水,通过5 a的咸水畦灌播前造墒大田试验,分析了不同程度盐分胁迫（1（对照）、2、4、6、8、10 g/L）与棉花生长指标和籽棉产量的响应关系,得出不同矿化度咸水播前造墒条件下棉花的耐盐性鉴定指标及耐盐特征值。结果显示,相对出苗率、相对株高、相对叶面积、相对地上部干物质质量、相对果枝数、相对成铃数和相对蕾花铃最大值均可以作为棉花的耐盐性鉴定指标,其中相对株高易于观测,盐害指示效果好,因此作为推荐使用耐盐性鉴定指标。同时,灌溉水矿化度控制在5.48 g/L以下时,咸水造墒连续灌溉5 a后,在产量与对照相比不减产。

英文摘要：

In order to use the mineralized shallow groundwater to relieve the crisis of freshwater resources shortage,the 5 years field experiment under border irrigation with mineralized water before sowing was conducted.The response relations among different salt stress levels and cotton growth index and seed cotton yield were analyzed in this study,and the cotton salt tolerance appraisal indices and eigenvalue under border irrigation with different saline water before sowing were put forward.The results showed that the relative emergency rate,relative plant height,relative leaf area,relative above-ground dry matter mass,relative fruit branch number,relative boll number and relative maximum of buds,flowers and bolls all could be used as salt tolerance appraisal indices of cotton.The relative height was recommended as the most practical salt tolerance appraisal index among them because it was easy to observation and sensitive to salt stress.The salinity of irrigation water should be below 5.48 g/L when the yield of seed cotton in saline water treatment was consistent with the fresh water irrigation treatment after a 5-year continuous irrigation.