拉萨市区周边自然土壤主要养分空间变化特征与植被类型分布关系研究  

Analysis on relationship between the characteristics of spatial variation in natural soil main nutrients and the distribution of vegetation type in urban area around Lhasa

作　　者：次仁[1] 邹珊 赵茜茜 戚琪 何惜雨 索朗曲珍[1] 孙永明 Tsering;ZOU Shan;ZHAO Xi-xi;QI qi;HE Xi-yu;Suolang-Quzhen;SUN Yong-ming(School of science,Tibet university,Lhasa 850000,China)

机构地区：[1]西藏大学理学院

出　　处：《高原科学研究》2019年第3期1-8,共8页Plateau Science Research

基　　金：西藏自治区大学生创新性试验训练计划项目(201810694005)

摘　　要：为了揭示拉萨市区周边土壤常规营养变化情况,于2018年秋季,在拉萨市区周边设立了5个采样区,按垂直高程变化每100 m设置一个样点采集土层样品,分析其常规营养组成并与植被类型生长差异的对比。结果显示:拉萨市区周边土壤中有机质含量较少,远低于东部森林土壤;土壤铵态氮含量相对稳定,并且随着海拔的增加而降低;有效磷含量与海拔高度呈正相关;速效钾含量低于森林土壤钾含量,与有机质含量相关。由此可见,拉萨周边造林困难以及土壤肥力较低可能是影响成林规模的重要因素,可根据此实施一定的改良措施来提高土壤养分含量。In order to reveal the changes in soil conventional nutrition in urban area around Lhasa,the soils sam?ples were collected from 5 sampling sites at every 100 meters along the elevation in the autumn of 2018.The soil conventional nutrient composition was analyzed and compared with the soil from forest vegetation.The results showed that the organic matter content of soil in Lhasa was small and was much lower than that in soil from for?est.The ammonium nitrogen content of soil in Lhasa was relatively stable and decreased with the increase of alti?tude,however,the effective phosphorus content is positively correlated with altitude.The of available potassium content of soil in Lhasa was lower than that in soil from forest and was related to the organic matter content of soil.It can be concluded that the low nutrient content in soil may be one of important factors affecting on difficult in afforestation and scale of forestry around Lhasa.Therefore,a certain improvement measures can be implement?ed to increase soil nutrient content.

关 键 词：土壤 主要养分 空间特征 拉萨 

分 类 号：S184[农业科学—农业基础科学]