不同改良措施对银川平原盐碱地土壤性质及酶活性的影响  

Effect of Soil Properties and Soil Enzyme Activity in Different Improvement Measures of Saline-alkali Soil in Yinchuan Plain

作　　者：李凤霞[1] 王学琴[2,3] 郭永忠[3,4] 许兴[3] 杨建国[1] 柯英[1] 肖红艳[1] 

机构地区：[1]宁夏农林科学院农业资源与环境研究所,银川750002 [2]宁夏科技发展战略与信息研究所,银川750001 [3]宁夏大学,银川750021 [4]宁夏农林科学院荒漠所,银川750002

出　　处：《水土保持研究》2012年第6期13-18,共6页Research of Soil and Water Conservation

基　　金：国家自然科学基金项目(40961020);国家科技支撑计划项目(2007BA08B05)

摘　　要：研究了秸杆、有机肥、烟气脱硫废弃物、盐碱地改良剂对银川平原盐碱地进行改良后土壤理化性质及土壤酶活性的变化。结果表明:4种改良措施对土壤pH值、全盐含量、土壤容重均有不同程度的降低,脱硫废弃物和改良剂处理降低土壤pH值和全盐含量效果显著,改良剂和有机肥处理降低土壤容重、增加土壤孔隙度的效果显著。盐碱地改良后土壤转化酶活性、脲酶活性和碱性磷酸酶活性增加的幅度分别为0.02%～85.0%,2.7%～53.3%,17.9%～49.7%,各改良措施对过氧化氢酶活性的影响不显著。土壤pH值、全盐含量和土壤容重之间互成显著正相关关系(p<0.05),与土壤孔隙度呈显著负相关关系(p<0.05);土壤容重与土壤孔隙度、过氧化氢酶、脲酶活性之间达到显著负相关关系(p<0.05),土壤碱性磷酸酶、转化酶、土壤过氧化氢酶和脲酶之间互成显著正相关关系(p<0.05)。The soil properties and soil enzyme activities in saline-alkali land of the Yinchuan Plain were studied after the soil was improved with straw,organic fertilizer,flue gas desulfurization waste and saline-alkali soil conditioner.The results showed that four measures reduced soil pH,total salt content and soil bulk density to some extent,flue gas desulfurization waste and saline-alkali soil conditioner significantly reduced soil pH and total salt content,saline-alkali soil conditioner and organic fertilizer reduced soil bulk density and increased soil porosity remarkably.The improvement measures significantly increased soil invertase activity,urease and alkaline phosphatase activity after improvement,the increase rates were 0.02%-85.0%,2.7%-53.3%,17.9%-49.7%,respectively.The effect of the improvement measures on change of catalase activity was not significant.There was a positive correlation relationship（p0.05） among soil pH,total salt content and soil bulk density,and soil porosity had a negative correlation relationship with soil pH,total salt content（p0.05）.There was a negative correlation relationship（p0.05） among soil bulk density and soil porosity,hydrogen peroxide enzyme,urease activity.There was a positive correlation relationship（p0.05） among soil alkaline phosphatase,invertase,catalase and urease activity.

关 键 词：土壤酶活性 土壤性质 盐碱地 改良 银川平原 

分 类 号：S156.4[农业科学—土壤学]