On Spatial Variability and Distribution of Soil Nutrients in Different Nitraria tangutorum Bobr.Populations in Tsaidam Basin  

柴达木盆地不同居群白刺土壤养分空间变异性（英文）

作　　者：苏艳[1] 邱权[1] 何茜[1] 李吉跃[1] 王军辉[2] 王宁[3] 孙奎[3] 贾子瑞[2] 

机构地区：[1]华南农业大学林学院,广州510642 [2]中国林业科学研究院林业研究所,国家林业局林木培育重点实验室,北京100091 [3]青海省农林科学院野生植物资源研究所,青海西宁810016

出　　处：《Agricultural Science & Technology》2015年第2期285-291,共7页农业科学与技术（英文版）

基　　金：Supported by the Special Scientific Research Project of Forestry Public Welfare Profession(200904033);The Project of Agricultural Science and Technology Achievements Transformation Fund(2011GB24320010)~~

摘　　要：In this paper,six important distribution areas of Nitraria tangutorum Bobr.in Tsaidam Basin were selected as research objects,to study spatial variability and distribution of soil nutrients in different N.tangutorum populations and analyze the relationship between soil nutrient contents and geographical location,by measuring soil pH and the contents of organic matter（OM）,total nitrogen（N）,total phosphorus（P）,total potassium（K）,hydrolysis N,available P and available K in soils.Results showed that：（1） soil nutrient contents among different populations showed significant spatial variability,and soil depth had a significant effect on soil nutrients contents,but the variation rules were not obvious.（2）Average pH and average contents of OM,total N,total P,total K,hydrolysis N,available P and available K in soils with different depths（0-15,15-30,30-45 cm） varied in the range of 8.37-9.21,3.34-20.68,0.18-1.21,0.35-0.75,16.12-22.04,5.13-553.28,1.10-52.54 and 103.83-562.28 mg/kg,respectively.（3） The analysis results of correlation between average values of pH and contents of nutrient indexes in soils with different depths（0-15,15-30,30-45 cm） showed that the correlation of these indexes were different.（4）OM and total N contents in soils with different depths（0-15,15-30,30-45 cm） all had a significant positive correlation with latitude and negative correlation with longitude and altitude,and the correlation of available P and available K contents in surface soils（0-15 cm） with latitude,longitude and altitude were significant positive,significant negative and significant negative,respectively;moreover,longitude and latitude also showed a significant impact on soil available K contents with the depth of 30-45 cm.In addition,comprehensive analysis result of nutrient contents showed that N.tangutorum populations in Huaitou Tala Town had the highest fertility,and the fertility levels of N.tangutorum populations in Chaka Town and Wulan Keke Town were relatively lower.在青海柴达木盆地选择6个重要的唐古特白刺（Nitraria tangutorum）分布区域,通过测定不同白刺居群的土壤pH、有机质（OM）、全氮（N）、全磷（P）、全钾（K）、碱解N、有效P和速效K含量,对比不同白刺居群间的土壤养分差异,分析其空间变异性以及与地理位置的相关关系。结果表明：1土壤养分含量存在显著空间变异性,土层深度对土壤养分含量有显著影响,但各养分指标含量随土层深度变化规律不明显。2 3个土层深度（0-15,15-30,30-45cm）土壤pH、OM、全N、全P、全K、碱解N、有效P、速效K含量平均值变化范围分别是：8.37-9.21、3.34-20.68、0.18-1.21、0.35-0.75、16.12-22.04、5.13-553.28、1.10-52.54 g/kg和103.83-562.28 mg/kg。3 3个土层深度的各土壤养分含量平均值之间相关性分析结果表明,土壤养分含量之间存在不同程度的相关性。4 3个土层的土壤OM和全N含量纬度、经度和海拔分别呈显著正相关、负相关和负相关,表层土壤（0-15 cm）有效P和速效K含量与纬度、经度和海拔分别呈显著正相关、负相关和负相关,经度和海拔还显著影响30-45 cm深土壤速效K含量。此外,综合分析各养分含量发现怀头他拉镇白刺居群土壤肥力最高,而茶卡镇和乌兰柯柯镇肥力相对较低。

关 键 词：Soil nutrients Spatial variability Geographical location Nitraria tangutorum Bobr. Tsaidam Basin 

分 类 号：S793.9[农业科学—林木遗传育种]