不同改良利用模式对辽西北风沙土理化陛质的影响

摘要

In order to research the effect of different improvement and utilization measures on physical and chemical properties of sandy soil in Northwest Liaoning, four improvement and utilization models were chosed to analyze the physicochemical property of soil by flowing aeolian sandy soil as a comparison. The results showed that: physical and chemical properties of aeolian sandy soil which was improved had been improved better, and the three-phase proportion of aeolian sandy soil tended to be more coordinating. The effect of different improvement and utilization patterns was as follows: broad leaved tree model was better than purple medic model,purple medic model was better than shrubbery model, shrubbery model was better than conifer model. The ratio of soil humic acid and fulvic acid in each model was reduced than it in flowing aeolian sandy soil, and the HA/FA 〈 1.%为了研究不同改良措施对辽西北风沙土理化性质的影响，选择了4种不同的改良利用模式作为研究对象，以流动风沙土作为对照，对不同模式下土壤的物理化学性质进行了测定分析。结果表明：风沙土经过各种措施改良后土壤的物理化学性质得到了很好的改善，风沙土三相比例更加趋于协调。不同利用模式对风沙土土壤养分的改善效果是阔叶树模式好于苜蓿改土模式，苜蓿改土模式好于灌木林模式，灌木林模式好于针叶树模式。各模式土壤的胡敏酸与富里酸的比值与流沙比较呈降低趋势．且HA／FA〈1。