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.
出处
《水土保持研究》
CSCD
北大核心
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)
关键词
土壤酶活性
土壤性质
盐碱地
改良
银川平原
soil enzyme activity
soil properties
saline-alkali soil
improvement
Yinchuan Plain
