千阳县冉家沟流域不同生物措施治理水土流失区土壤水分养分的变化  

Changes of Soil Physical and Chemical Properties in Harnessing Region of Soil and Water Erosion by Different Biological Measures in Ranjiagou Valley of Qianyang County

作　　者：韩恩贤[1] 韩刚[1] 关红杰[1] 淮宗安 李惠萍 柳永强 

机构地区：[1]西北农林科技大学林学院,陕西杨陵712100 [2]千阳县林业站,陕西千阳715008

出　　处：《西北林学院学报》2009年第5期16-20,共5页Journal of Northwest Forestry University

基　　金：国家林业局"渭北旱原沟壑区困难立地综合造林技术示范项目"(2006-84-2)

摘　　要：研究了陕西省千阳县冉家沟流域不同退耕还林模式地林木生长状况和土壤理化性质的变化。结果表明,不同退耕还林模式地土壤理化性质均得到不同程度的提高,其变化程度为封山育林模式>林草混交模式>刺槐沙棘模式>刺槐纯林模式。封山育林模式、林草混交模式(刺槐和苜蓿)、刺槐沙棘混交模式、刺槐纯林模式土壤含水量比荒地分别提高了13.44%、7.91%、2.77%、1.03%;封山育林模式与林草混交模式地有机质含量比纯林分别增加了23.88%、23.88%,全氮分别增加了23.86%、36.2%,刺槐的蓄积量分别增加了67.4%、56.9%。封山育林后林地的水分养分含量和林木生长状况已得到一定程度的恢复,这种生态重建模式值得类似地区推广与应用。Growth situations of the forests and physicochemical properties under different models of forest rehabilitation were investigated in Ranjiagou watershed, Qianyang County, Shaanxi Province. The results indicated that physicochemical properties in 4 models were improved in the order of closing forest 〉 mixing forest with grass 〉 mixing Robinia pseudoacacia with Hippophae rhamnoides 〉pure R. pseudoacacia. Compared with wasteland, soil water content of 4 models mentioned above increased by 13. 44%, 7.91%, 2.77% and 1.03% respectively. Compared with pure plantation, soil organic matter content of closing forest and mixing forest with grass inscreased by 23.88% and 23.88 % respectively, total nitrogen content increased by 23.86% and 36. 2% respectively, and the storage capacity of R. pseudoacacia increased by 67.4% and 56.9% respectively. Soil moisture and soil nutrients and growth situation of forest tree were improved greatly under the model of closing forest, indicating that this model is worth to be extended in eco-reconstruction.

关 键 词：流域治理 生物措施 退耕还林 理化性质 土壤水分和养分 

分 类 号：S718.5[农业科学—林学]