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| DOI： |
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| Influence of Brackish Water Irrigation on Soil EC and Yield of Winter Wheat |
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LIU Zongxiao， ZHU Chengli， ZHAI Yaming， ZHENG Junyu， HU Shuwen
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College of Water Conservancy and Hydropower，Hohai University， Nanjing 210098， China；Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-water Environment in Southern China，Ministry of Education，Nanjing 210098，China；.Jiangsu Huaiyuan Supersion of Engineering Construction Co.Ltd., Huaian 223005, China
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| Abstract: |
| 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”. |
| Key words: brackish water, alternate irrigation; winter wheat; salinity levels; EC |
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