微咸水灌溉对土壤EC值及冬小麦产量的影响  

Influence of Brackish Water Irrigation on Soil EC and Yield of Winter Wheat

作　　者：刘宗潇 朱成立[1,2] 翟亚明[1,2] 郑君玉[1] 胡淑文 

机构地区：[1]河海大学水利水电学院,南京210098 [2]南方地区高效灌排与农业水土环境教育部重点实验室,南京210098 [3]江苏淮源工程建设监理有限公司,江苏淮安223005

出　　处：《灌溉排水学报》2017年第3期59-64,共6页Journal of Irrigation and Drainage

基　　金：国家自然科学基金青年基金项目(51409086);江苏省科学技术厅(BK20130838)

摘　　要：通过测坑试验,在"咸淡淡"、"淡咸淡"、"淡淡咸"3种微咸水-淡水交替灌溉方式和1、3、5 g/L三种微咸水矿化度水平条件下,监测并分析了各生育期灌水前后及生育期结束后土壤0~20、20~40、40~60 cm土层EC值,测定并分析了冬小麦产量及其构成因子。结果表明,整个生育期内,各层土壤EC值呈波动周期性变化趋势;微咸水-淡水交替灌溉方式主要影响土壤盐分的垂直分布,盐灌越靠前,盐分聚集层越深;灌水矿化度主要影响土壤总体EC值,随灌水矿化度增加,土壤总EC值变大。冬小麦产量和产量构成因子随灌水矿化度升高而呈减小的趋势,冬小麦的产量构成因子及产量在"咸淡淡"与"淡淡咸"2种轮灌方式下差异性显著,表现为"咸淡淡"<"淡淡咸"。Through winter wheat plot experiment, with three alternate irrigation modes （＂brackish water-fresh water- fresh water＂, ＂fresh water-brackish water-fresh water＂ and ＂fresh water-fresh water-brackish water＂） and three kinds of mineralization of brackish water （ 1,3,5 g/L NaCl） respectively, soil EC in 0-20 cm, 20-40 cm and 40-60 cm, yield and yield components were monitored and analyzed before and after irrigation during the growth progress. The results showed that soil EC fluctuated cyclically in different soil layers; Brackish-fresh water alternate irrigation modes had influences on salt distribution of vertical soil space, the earlier salt irrigated, the deeper layer of salt accumulated. Salinity levels had a significant influence on Soil EC, which was enhanced under brackish water irrigation and increased more obvious under higher salt concentration of irrigation water. Winter wheat yield and yield component declined with the increase of salinity and also faced significant differences between the alternate irrigation modes ＂brackish-fresh water＂ and ＂fresh-brackish water＂, showing that ＂brackish-fresh water＂〈 ＂fresh-brackish water＂.

关 键 词：微咸水 交替灌溉 冬小麦 矿化度 EC 

分 类 号：S512.11[农业科学—作物学] S273