ZHENG Yu,LI Zhan-bin,LI Peng,et al.Features of Land Use Type on Soil Properties in the Dry-hot Valley of Jinsha River[J].Research of Soil and Water Conservation,2010,17(01):174-177,251.
金沙江干热河谷区不同土地利用方式下的土壤特性分异特征
- Title:
- Features of Land Use Type on Soil Properties in the Dry-hot Valley of Jinsha River
- Keywords:
- dry-hot valley areas; land use types; soil properties
- 分类号:
- F301.24;S153
- 摘要:
- 对金沙江干热河谷区相同背景条件下的合欢林地、玉米地、桑地、甘蔗地、花椒地、撂荒草地以及水桐树林地的土壤理化性状进行了研究.结果表明,该区域天然水桐树林破坏后改为其它土地利用方式后对土壤理化性质影响显著,表现为土壤有机质、全氮、全磷和碱解氮含量显著降低,速效磷和容重没有显著变化,速效钾有一定程度升高;不同利用方式对其影响作用差异不同,但总体来说改造为合欢林和撂荒草地对土壤理化属性的影响相对较少.土壤综合属性指数随天然水桐树林改为其它利用方式后均呈现不同程度降低,其降幅由小到大依次为草地>合欢林地>甘蔗地>玉米地>花椒地>桑地,人为干扰越重对土壤质量的破坏作用越大,因此减少人为活动,增加该区域土壤物质归还量是改善土壤质量的重要措施之一.
- Abstract:
- In the paper,soil physiochemical properties of seven plots with same background conditions in the dry-hot valley of Jinsha River were studied.They are the leucocephala land,corn land,mulberry land,sugarcane land,the pepper land,the abandoned grassland and candlenut land.The results show that there is a significant change in soil physiochemical properties after natural water candlenut forest being changed into other land use types,describing as soil organic,total nitrogen,total phosphorus and available nitrogen content was significantly reduced,available phosphorus and soil bulk density did not change significantly and available potassium increased to a certain extent;different ways to use have different effects on it,but generally speaking,the impact on soil physiochemical properties was relatively small after transforming to leucocephala land and abandoned grassland.Composite index of soil properties after the natural candlenut forest changing into other land use types showed a decrease to varying degrees,its decline from small to large order is grass land>leucocephala land>sugarcane land>corn land>pepper land>mulberry land.The more disturbed by man,the more destructive influence on soil quality.So one of the important measures to improve the soil quality is to reduce human activity and increase the return of the amount of soil material in this region.
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备注/Memo
收稿日期:2009-11-20。
基金项目:陕西省自然科学基金重点项目(SJ08-ZD02);国家重点基础研究发展计划项目(2007CB407206);国有科技支撑项目(2006BAD09B02)
作者简介:郑郁(1983－),女,硕士研究生,主要从事环境生态评价方面的研究.E-mail:zhengyu5369@163.com