微咸水灌溉条件下施用不同改良剂对盐渍化土壤盐分离子分布的影响

刘 易; 冯耀祖; 黄 建; 王新勇; 祁 通; 孟阿静

刘易，冯耀祖，黄建,王新勇，祁通，孟阿静.微咸水灌溉条件下施用不同改良剂对盐渍化土壤盐分离子分布的影响[J].干旱地区农业研究,2015,33(1):146~152

微咸水灌溉条件下施用不同改良剂对盐渍化土壤盐分离子分布的影响

Effects of modifiers on saline soil salt distribution under brackish water irrigation conditions

DOI：10.16302/j.cnki.1000-7601.2015.01.024

中文关键词: 土壤改良剂微咸水灌溉盐分离子盐碱地改良

英文关键词:soil amendment agent brackish water saline iron saline land improvement

基金项目:新疆自治区公益性科研院所基本科研业务经费资助项目“新疆滴灌作物配套农艺调控技术研究与示范”(KY2013050)；新疆农科院优秀青年科技人才基金项目“生物质碳输入对新疆盐渍化土壤水盐运移的影响”(xjnkq-2013012)

作者	单位
刘易，冯耀祖，黄建,王新勇，祁通，孟阿静	(新疆农科院土壤肥料与农业节水研究所，新疆乌鲁木齐 830091)

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中文摘要:

利用5种不同的土壤改良剂，对矿化度在2～3 g·L^-1的微咸水灌溉棉田土壤进行改良效果研究。结果表明：五种改良剂均降低土壤pH值和总盐含量，并能有效控制土体Na⁺、Ca²⁺、SO₄^2-、HCO₃^-积累；其中，磷石膏能显著降低土体Na⁺、Ca²⁺、SO₄^2-总含量（P＜0.05），DS1997能显著降低土体Na⁺、HCO₃^-总含量（P＜0.05），酸碱平衡剂显著降低土体Ca²⁺、SO₄^2-总含量（P＜0.05），禾康改良剂有效控制土体SO₄^2-、HCO₃^-含量；改良剂对土体中Cl^-改良效果不显著（P＞0.05）。研究得出：微咸水灌溉导致土壤pH值升高和含盐量增加，造成土壤盐分的积累；土壤改良剂可有效减少微咸水灌溉引起的盐分积累，改善土壤理化特性和盐分离子分布。

英文摘要:

To clarify the influence of brackish water with 2～3 g·L^-1 salinity on the improvement of cotton field soil, five kinds of soil amendments agents were used in this study. The results showed that all five agents could decrease pH values and total salt contents in the soil. Also, they could effectively control the accumulation of Na⁺, Ca²⁺, SO₄^2- and HCO₃^-. In particular, phosphogypsum could significantly decrease the total content of Na⁺, Ca²⁺ and SO₄^2- in the soil (P<0.05), and the DS1997 amendment could decrease the content of Na⁺ and HCO₃^- significantly (P<0.05). The acid-base equilibrium amendment could significantly decrease the content of Ca²⁺ and SO₄^2- (P<0.05). In He Kang treatment, the contents of SO₄^2- and HCO₃^- in the soil were efficiently controlled. However, these five soil amendments did not show significant effects in controlling the accumulation of Cl^- (P<0.05) in this experiment. In conclusion, although brackish water irrigation could induce the increases of pH and saline contents in the soil, the soil amendments could limit and remit these effects significantly. In the meantime, soil amendments could improve the phi-chemical characteristics and saline ion distribution in the soil.

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