有机肥对苏打盐碱土的改良效果研究

本文通过田间与盆栽模拟试验研究了有机肥对苏打盐碱土的改良效果。结果表明:苏打盐碱土施有机肥后,土壤pH值显著下降;土壤盐基离子组分发生显著变化,如Na+含量下降,Na+占阳离子比例由77.91%降至68.56%,而Ca2+、Mg2+含量变化与之相反;同时,施用有机肥使土壤有机质、全氮、全磷、全钾含量显著增加;此外,玉米单产随有机肥用量的增加而呈增加趋势。结果表明:施用有机肥是一种改善盐碱土理化性质、增加玉米单产的重要措施。

Effects of Organic Manure on Improving Soda Saline-Alkali Soil

The effects of organic manure on improving soda saline-alkali soil were studied by field experiments and pot trials.The results showed that applying organic manure to soil could significantly reduce soil pH values.Soil base-exchangeable ion components altered obviously,i.e.,the content of Na+ decreased,and the Na+ proportion in all cations decreased from 77.91% to 68.56%,while the contents of Ca2+ and Mg2+ inversely increased due to organic manure application.Meanwhile,the application of organic manure also remarkably increased the contents of soil organic matter(OM),total N,total P and total K as compared with control.The maize yield increased as amount of organic manure application increased.Our study indicated that the application of organic manure is an important measure to improve the physic-chemical characteristics of soil and increase maize yield.