玉米秸秆隔离层对西辽河流域盐碱土碱化特征及养分状况的影响  

Effect of Maize Straw Lsolation Layer on Alkalization Characteristics and Nutrient Status of Saline-Alkali Soil in West Liaohe Region

作　　者：范富[1] 张庆国[1] 侯迷红[1] 邰继承[1] 孙德智[1] 刘振伟[1] 

机构地区：[1]内蒙古民族大学农学院,内蒙古通辽028043

出　　处：《水土保持学报》2013年第3期131-137,共7页Journal of Soil and Water Conservation

基　　金：内蒙古自然科学基金项目(20080404MS0607);内蒙古民族大学基金项目(MDX2008017);内蒙古民族大学科研创新团队支持计划项目(NMD1003)

摘　　要：自2008年开始用采自通辽市花吐古拉的盐碱土进行玉米秸秆隔离层处理,并种植大麦,分析4年盐碱土养分及碱化指标变化情况。结果表明:A3B1处理(玉米秸秆用量6kg/m2,掩埋深度为10cm)的改良效果最佳,经过4年的玉米秸秆隔离层生态修复,土壤有机质含量比对照区增加了10.4g/kg,碱解氮、速效磷、速效钾含量分别比对照区增加了43.2,56.0,102.7mg/kg,pH值下降了2.19个单位,碱化度下降了37.3%,总盐量降低了2.251g/kg;阳离子中K+、Na+、Ca2+、Mg2+含量分别下降了78.6%,72.8%,81.5%,75.6%;阴离子中CO23-、HCO3-、SO24-、Cl-含量分别下降了60.0%,75.5%,40.0%,65.5%。其他各处理区养分都得到不同程度的增加,碱化特征指标趋于良性改善。The nutrient and alkalization indicators were analyzed to study the improvement effects on barley in saline-alkali soil by using the isolation layer of maize straw since 2008.The results showed that the A3B1 treatment which maize straw was 6 kg/m2 and burial depth was 10 cm,was the optimal treatment.By the ecological restoration of maize straw isolation layer for four years,the content of soil organic matter was increased by 10.4 g/kg compared with the CK.Alkaline hydrolytic nitrogen,available phosphorus and available potassium contents were increased by 43.2,56.0,102.7 mg/kg respectively compared with the CK.The pH,degree of alkalization and total amount of salt were decreased by 2.19,37.3% and 2.251 g/kg respectively.The content of cations such as K＋,Na＋,Ca2＋ and Mg2＋ was reduced by 78.6%,72.8%,81.5% and 75.6% respectively.The content of anions such as CO32-,HCO3-,SO42- and Cl-was reduced by 60.0%,75.5%,40.0% and 65.5% respectively.The nutrient contents of other treatments were all increased in different degree,and the alkalization characteristics indicators were all improved.

关 键 词：盐碱土 玉米秸秆 隔离层 养分状况 碱化特征 

分 类 号：S156.4[农业科学—土壤学]