Agricultural college, Shihezi University, Shihezi City, Xinjiang, P.R.China.
Land and Water, Commonwealth Scientific and Industrial Research Organization, Canberra, ACT, Australia.
PLoS One. 2019 Nov 19;14(11):e0224790. doi: 10.1371/journal.pone.0224790. eCollection 2019.
Sustainable development of agricultural lands in arid environments is limited by soil salinization. Comprehensive measures were conducted to completely improve soil salinization in this study. For the purpose of assessing the effect of comprehensive improvement in salinized farmland in arid zone, soil salinity at a range of soil depths, EC of subsurface pipe drainage and crop yield during crop growth period in Xinjiang, China were investigated. The results show that soil salinity decreased significantly on mildly (1-3 dS m-1) and moderately (3-6 dS m-1) salinized farmlands. The improvement in moderately salinized soil was better than that in mildly salinized soil. The average desalinization rate of mildly and moderately salinized farmland was 15% and -15.8%, respectively. The more irrigation times were, the better desalinization effect became. The EC of drainage water varied in the range of 7.53-11.16 dS m-1 and was greater than the EC of irrigation water, which showed that subsurface pipe drainage can remove soil salinity from salinized farmlands. The crop yield using comprehensive improvement increased significantly compared with the control check. The outcome of this study suggests that comprehensive measures on salinized farmland are conductive to the decrease of soil salinity and the increase of crop yield.
干旱环境下农业土地的可持续发展受到土壤盐渍化的限制。本研究采用综合措施对土壤盐渍化进行了全面改良。为评估干旱区盐渍农田综合改良效果，对中国新疆不同土层土壤盐分、地下暗管排水电导率和作物生长期间作物产量进行了调查。结果表明，轻度（1-3 dS m-1）和中度（3-6 dS m-1）盐渍农田土壤盐分显著降低。中度盐渍土壤的改良效果优于轻度盐渍土壤。轻度和中度盐渍农田的平均脱盐率分别为 15%和-15.8%。灌溉次数越多，脱盐效果越好。排水水的电导率在 7.53-11.16 dS m-1 范围内变化，大于灌溉水的电导率，表明地下暗管排水可以从盐渍农田中去除土壤盐分。与对照相比，综合改良后的作物产量显著增加。本研究结果表明，盐渍农田的综合措施有利于降低土壤盐分和提高作物产量。
