玛纳斯河中游耕地灌溉方式变化对棉田土壤主要盐离子含量的影响

Impact of irrigation methods on soil salt contents and their differences in cotton growing season in arid area of Northwest China

采用实际田间取样、土样实验室分析以及统计分析等方法,对玛纳斯河中游耕地不同灌溉方式下棉田土壤主要盐离子含量的变化进行定量分析。研究结果表明:漫灌方式下土壤中Cl-/SO2-4值在各土层均有上升趋势,而滴灌方式下Cl-/SO2-4值在各土层表现出先上升后下降的趋势,在6月有一个高点,但随后下降到与4月相似的水平,表明漫灌方式比滴灌方式更易使得土壤的盐渍化类型向氯离子类型转变。研究结论对减缓土壤盐渍化、指导灌溉施肥管理以及耕地的可持续利用均有积极意义。

Soil water and salt changes are important in arid and semi science and agriculture science. In this paper,the actual field sampling,methods of soil samples for laboratory analysis and statistical analysis of Shihezi under different irrigation methods in cotton soil salinity changes in the cotton growing season were fully and quantitatively analyzed. Results showed the soil Cl^-/ SO4^2- ratio under flood irrigation was on the rise,while under drip irrigation it was firstly increased and then decreased; in June there was a high point,but then dropped to a level similar in April,suggesting flood irrigation allows more types of soil salinization shift to chloride ion type than drip irrigation; These results can be benefit for irrigation and fertilization management and suggest possible measures to improve sustainable land use.