摘要
[目的]研究土地利用方式对土壤养分剖面分布的影响。[方法]对北运河下游武清区土壤取样,测定土壤养分(pH、碱解氮、有效磷、速效钾、有机质)和土壤机械组成,结合武清区土地利用方式进行分析。[结果]不同土地利用方式对土壤机械组成有一定的影响,土壤剖面养分含量变化趋势为:有机质、碱解氮含量基本上呈抛"S"形分布,速效钾呈"U"形分布,而有效磷含量呈直线下降趋势。不同土地利用方式下耕层养分差异较明显。[结论]有效磷、有机质、碱解氮、速效钾含量具有一定的表聚性,以有效磷含量最有代表性。
[Objective]The research aimed to study the effects of land use on soil nutrients distribution in different profile.[Method]Soil sampling was conducted in Wuqing distnct,the Beiyun he River downstream.Soil nutrients such as pH,available nitrogen,available phosphorus,available potassium,organic matter and soil mechanical composition were measured.The analysis was combined with land use in Wuqing.[Result]Different land use had the effects on soil mechanical composition to a certain extent.The trend in soil nutrient content was that organic matter,nitrogen content was basically throwing＂S＂shaped distribution,K was＂U＂shaped distribution,while available phosphorus content showed a linear downward trend.Under different land use patterns,more obvious differences were existed in top soil nutrients.[Conclusion]Available phosphorus,organic matter,available nitrogen,available potassium content had the character of surface accumnulation in some extent and awaiable phosphorus content was the most representative.
出处
《安徽农业科学》
CAS
北大核心
2011年第19期11881-11883,11901,共4页
Journal of Anhui Agricultural Sciences
基金
国家水体污染控制与治理科技重大专项(2008ZX07209-001-02
2008ZX07209-006-04)
农业部农业生态环境保护项目
关键词
土地利用
剖面分布
土壤养分
Land use
Profile distribution
Soil nutrient
