安塞小流域土壤养分分布特征研究  

Soil nutrient distribution in the small watershed of Ansai

作　　者：刘梦云[1] 寇宝平[1] 常庆瑞[1] 刘京[1] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨陵712100

出　　处：《西北农林科技大学学报（自然科学版）》2002年第6期21-24,共4页Journal of Northwest A&F University(Natural Science Edition)

基　　金：国家"九五"科技攻关项目(96-007-01-01-02);国家自然科学基金资助项目(49941005;30190790)

摘　　要：　以黄土丘陵沟壑区安塞试区为例,通过野外调查和室内分析,对小流域土壤养分状况进行了研究。结果表明,该地区土壤肥力状况较差,主要养分含量表现为:干旱冲积新成土>黄土正常新成土>红色正常新成土,乔木林地>灌木林地>荒草地>农田,梁峁下部>梁峁顶部>梁峁上部;农田土壤养分在剖面上的分布上下均一,林草地则由上而下锐减,表聚性明显。山坡地退耕,植树种草,防止水土流失,保护生态环境;增加肥料施用量,注重平衡施肥是培肥改良土壤的基本措施。The goal in this paper is to study the soil nutrient detailed situation and modify land use mode.Based on outdoor investigation and indoor analysis for the soil nutrient situation in Ansai experimental area,the results show,the fertility of soil is very poor.The main nutrient content in soil groups shows:VstAlluvicEntisol>LosOothicEntisols>RedOrthicEntisols,in various vegetation shows:Soil of orb forest>Soil of shrub forest>Soil of Grass>Field,in types of physiognomy shows:the Lower part on hilly>the ultimate on hilly>the upper part on hilly;the nutrient distribute even on profile,yet the nutrients of forest and grass land decrease sharply form upper to lower.At last soil improvement and main controlling nutrients measures are raised in this paper.

关 键 词：小流域 土壤养分 分布特征 空间分布 土壤培肥改良 黄土高原 安塞试区 

分 类 号：S158.2[农业科学—土壤学] S159.[农业科学—农业基础科学]