四川盆地紫色丘陵区土地利用类型对土壤理化性质的影响  

The Influence of Varied Land-use on Soil Properties in Hilly Area of Sichuan, China

作　　者：刘刚才[1,2] 范建容[3] 张建辉[3] 高美荣[3] 王道杰[3] 

机构地区：[1]西南农业大学资源与环境学院 [2]中国科学院水利部成都山地灾害与环境研究所四川成都610041 [3]中国科学院水利部成都山地灾害与环境研究所

出　　处：《山地学报》2005年第2期209-212,共4页Mountain Research

基　　金：国家自然科学青年基金 (4 0 2 0 10 2 9);国家攻关项目课题"四川低山丘陵区水土流失综合治理技术与示范"。~~

摘　　要：为了提供土地利用结构调整的科学依据,调查和测试了四川盆地紫色丘陵区南充和盐亭两个典型小流域内草地、林地和耕地的土壤理化性质,结果表明:不同土地利用对土壤理化性质的影响是明显的。林/草地较耕地能显著增加(约1倍)土壤有机质含量。研究结果还揭示了耕地的长期耕种,使其土壤理化性质和功能退化,如土壤抗蚀性和持水性能降低。因此。To understanding the effects of land use types on soil properties is the base of understanding the environmental evolvement and its control,as well as the land use construction adjustment.The properties of soils sampled from two typical small watersheds in Nanchong and Yanting of Sichuan hilly area,were investigated and analyzed by standard methods.The results showed the impact of land use types upon soil properties is significant.Woodland/grassland substantially increased soil organic materials content(especially within top layer)by near 100%,and organic nitrogen by 505 for woodland on Penglai group soil,comparing to that of arable land.It is not significant that the effects of land uses on other soil nutrient.Soil particle distributions dont have significant difference between land uses.Only coarse aggregates(20～0.2 mm) of forestland/grassland on Suining group purple soil is more than that of arable land.Therefore,forestland/grassland has higher anti-erodibility than that of arable land.The soil water curve showed the order of soil water decay rate is arable land>forestland>grassland. And it is implied the long-term cultivation lead to soil properties and soil functions degradation of arable land,such as decrease of anti-erodibility and water-retention.Therefore,increase input of organic fertilizers is the important means to make arable land sustainable use.

关 键 词：土地利用 土壤性质 土壤退化 耕地 

分 类 号：S153[农业科学—土壤学] F323.2[农业科学—农业基础科学]