摘要
通过土壤养分测定,研究了重庆市长寿区代家沟小流域不同土地利用方式下坡面土壤养分分布特征。结果表明:3种坡位坡耕地的有机质和全量养分含量要远低于有林地,坡耕地和果园的速效养分要远远大于疏林地、荒草地、桑园及有林地的速效养分,果园-疏林地-有林地及有林地-桑园-坡耕地,这两种土地利用结构类型坡面具有较高的土壤养分含量;相同坡位上,土壤养分含量也不同,TP含量虽然在各个坡位中有一定差异,但只在坡顶相差很大,坡中和坡脚的含量不大。坡耕地的速效K含量要远远高于果园和有林地,果园和有林地的速效K含量相差不大。坡面土壤碱解N、有效P、速效K含量与坡位表现出显著相关性。
Through soil fertility determination,soil nutrient distribution characteristics under different land use were studied in Daijiagou small watershed of Changshou district of Chongqing. Results indicated that the sloping farmland organic matter and the total nutrient content in different slope position were much more lower than the forest land,but the fast-acting nutrient content in sloping farmland and orchard were higher than the stocked land,the weed land,the mulberry orchard and the forest land by far,Two kinds of land utilization structure type of the orchard-stocked land-forest land and the forest land-mulberry orchard-sloping farmland had more higher soil nutrient content;In the same slope position,the soil nutrient content was also different,TP content,although displayed certain difference in different slope position,but just had evident difference on the top and almost no difference on the middle and toe of the slope.The sloping farmland fast-acting K content were higher than the orchard and the forest land by far,the difference of fast-acting K content between orchard and the forest land is not obvious. There had remarkable relevance among soil alkaline hydrolysis N,effective P,the fast-acting K content and the slope position.
出处
《水土保持学报》
CSCD
北大核心
2009年第6期118-122,共5页
Journal of Soil and Water Conservation
基金
国家自然科学基金(40671115
40971166)
国家科技支撑计划重点项目(2008BAD98B01)
重庆市自然科学基金重点项目(2007BA1015)
西南大学生态学重点学科"211"工程建设项目
关键词
土壤养分
土地利用方式
代家沟小流域
分布特征
soil fertility
land use types
Daijiagou small watershed
distribution characteristics
