【摘要】 研究了在不同初始盐度造墒条件下,滨海盐碱地覆膜棉田水盐分布及棉花生长动态特征。结果表明,棉花生育期结束后,经雨季淋洗T、D1、D2、D3处理0~40cm土层土壤电导率分别降低了40.60%、37.04%、45.12%、57.56%,0~100cm土层土壤脱盐率分别为33.02%、32.78%、28.19%和34.37%。D3处理干物质总量分别比T、D1和D2处理降低了98.09%、120.21%、76.34%。产量以D1处理最高(3 156.78kg/hm2),D3处理最低,较D1处理减少了30.25%;T处理纤维品质为B级,优于其他处理(均为C级),不同处理间断裂比强度、伸长率等差异不明显。降水对0~40cm土层内盐分淋洗效果明显,咸水滴灌未对棉花产量产生不利影响。更多还原

【Abstract】 Field experiments were conducted to study the water and salt distributions and growth characteristics under different soil salinity.The results showed that,compared with those in the driest situation,due to leaching after rainy season,the soil ratio of desalinization of 0~100cm layer under T,D1,D2 and D3treatments decreased by 33.02%,32.78%,28.19%and 34.37%,and electronic conductivity(ECs)of0~40cm layer decreased by 40.60%,37.04%,45.12% and 57.56%,respectively.Dry matter in D3 treatment decreased by 98.09%,120.21%,76.34%compared to T,D1,D2 treatments,and there was no significant difference between D1 and D2treatments.The yield in D3 treatment was the lowest,and decreased by 30.25%compared to that in D1 treatment with the top yield of 3 156.78kg/hm2.Fiber quality in the T treatment was B grade,which was better than other treatments with drip irrigation,however,there was no significant difference in specific breaking strength and elongation indexes.Heavy rain would significantly lower the ECsof 0~40cm layer,and drip irrigation with saline water and increase cotton yield in wet year.更多还原