干旱区生态环境知识资源中心(Arid): 拉萨河下游灌草交错区土壤养分空间分异特征

Arid

	拉萨河下游灌草交错区土壤养分空间分异特征
其他题名	Spatial Variation Characteristics of Soil Nutrients in Shrub-grass Econtone in the Lower Lhasa River Basin
	庞利 1; 屈兴乐 1; 殷文杰 1; 方江平 2; 罗大庆 1
来源期刊	河南农业科学
ISSN	1004-3268
出版年	2015
卷号	44 期号:4 页码:77-82
中文摘要	以拉萨河下游半干旱区亚高山带灌草交错区为研究区域,分别对其南、北坡的灌丛、灌草和草地土壤养分含量进行对比分析。结果表明,土壤pH值在6.6~8.5,总体呈中性偏弱碱性,适宜中性和弱碱性植物生长,南、北坡灌丛及南坡草地的土壤pH值与土层深度均可用二次函数拟合。土壤有机质含量在15.15~43.74 g / kg,南坡0~40 cm土层土壤有机质平均含量表现为草地>灌草>灌丛,北坡表现为灌草>灌丛>草地;南、北坡灌丛和草地及北坡灌草的土壤有机质含量与土层深度均呈显著负相关,且符合二次函数关系。土壤全氮含量在0.72~2.15 g / kg,南坡土壤全氮含量表现为草地>灌草>灌丛,北坡表现为灌丛>灌草>草地;南、北坡灌丛及南坡灌草土壤全氮含量与土层深度呈显著负相关,且符合二次函数关系;南、北坡草地土壤全氮含量与土层深度无显著相关性。土壤全磷含量在0.22~0.54 g / kg,南坡土壤全磷含量表现为草地=灌草>灌丛,北坡表现为灌丛>草地>灌草;南坡灌草土壤全磷含量与土层深度无显著相关性,而北坡则呈显著正相关,且南、北坡灌草全磷含量与土层深度均可用二次函数拟合。土壤全钾含量在2.70~4.59 g / kg,南坡全钾含量表现为草地>灌草>灌丛,北坡表现为灌草>草地>灌丛,且南、北坡灌丛、灌草和草地的土壤全钾含量与土层深度均无显著相关性,南、北坡灌丛土壤全钾含量与土层深度的关系都可用二次函数拟合。总体上,南、北坡的土壤养分含量有明显差异,其中南坡灌丛和灌草的土壤有机质、全氮、全磷和全钾含量都低于北坡;对于草地,除南坡土壤全磷含量低于北坡外,其余养分含量均为南坡高于北坡。
英文摘要	The ecotone of shrub and herbaceous plant in the subalpine zone of semi-arid region of the downstream of Lhasa River was used as the survey region,and the nutrient contents of the soil collected from the shrub,shrub-grass and grass land in both the southern and the northern slopes. The results showed that the pH value of the soil was between 6.6 and 8.5,which was neutral and slightly alkaline and suitable for the growth of neutral and slightly alkaline plants,and the relations between the soil pH values of shrub land in the sourthern and northern slope,grass land in the sourthern slope and the soil depth could be fitted by the quadratic function. The soil organic content was between 15.15 g /kg and 43.74 g /kg, the order of average content of organic matters in the soil layer of 040 cm was grass land > shrub-grass land > shrub land in the southern slope and shrub-grass land > shrub land > grass land in the northern slope,and the relations between the soil organic content of shrubs and grass lands in the southern and northern slopes, shrub-grass land in the northern slope and the soil depth could be fitted by quadratic function. The total nitrogen content of soil was 0.722.15 g /kg, the orders of total nitrogen content in the southern slope and the northern slope were grass land > shrub-grass land > shrub land and shrub land > shrub-grass land > grass land respectively,and the total nitrogen content of shrub land in the southern and northern slopes, shrub-grass land in the southern slope,were apparently negatively correlated with the soil depth, the relations between them conformed to the quadratic function. However, there was no apparent correlation between total nitrogen content of grass land in the southern and northern slopes and the soil depth. The total phosphorus content of the soil was 0.220.54 g /kg, the orders of total phosphorus contents in the southern slope and northern slope were grass land = shrub-grass land > shrub land and shrub land > grass land > shrub-grass land respectively. The total phosphorus content of shrub-grass land had no apparent correlation with the soil depth in the southern slope,while which had apparently positive correlation with soil depth in the northern slope,and the relations between total phosphorus contents of shrubgrass land in the southern and northern slopes and the soil depth could be fitted by the quadratic function. The total potassium content of soil was 2.704.59 g /kg, the orders of total potassium contents in the southern and northern slopes were grass land > shrub-grass land > shrub land and shrub-grass land > grass land > shrub land respectively. The total potassium contents of shrub, shrub-grass and grass lands had no apparent correlations with the soil depth in the southern and northern slopes. It was suitable to use the quadratic function to fit the relationship between total potassium contents of the shrub land in the southern and northern slopes and the soil depth. Generally, soil nutrient contents were apparent different between the southern slope and the northern slope; the contents of organic matters, total nitrogen, total phosphorous and total potassium of the shrub land and shrub-grass land in the southern slope were lower than that in the northern slope; with respect to the grass land, the contents of all nutrients except total phosphorous in the southern slope was higher than that in the northern slope.
中文关键词	灌丛地 ; 草地 ; 坡向 ; 土壤养分 ; 空间分异特征
英文关键词	shrubland grassland slope direction soil nutrient spatial variation characteristics
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5426948
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232880
作者单位	1.西藏农牧学院高原生态研究所, 林芝, 西藏 860000, 中国; 2.西藏农牧学院高原生态研究所, 西藏林芝高山森林生态系统国家野外科学观测研究站, 林芝, 西藏 860000, 中国
推荐引用方式 GB/T 7714	庞利,屈兴乐,殷文杰,等. 拉萨河下游灌草交错区土壤养分空间分异特征[J],2015,44(4):77-82.
APA	庞利,屈兴乐,殷文杰,方江平,&罗大庆.(2015).拉萨河下游灌草交错区土壤养分空间分异特征.河南农业科学,44(4),77-82.
MLA	庞利,et al."拉萨河下游灌草交错区土壤养分空间分异特征".河南农业科学 44.4(2015):77-82.