祁连山典型流域青海云杉林土壤氮磷钾空间变异性研究  

Spatial Variability of Soil Nitrogen,Phosphorus and Potassium in Picea crassifolia Forest in the Typical Watershed of the Qilian Mountains,Northwestern China

作　　者：张瑞浩 赵维俊 王坤[3] 敬文茂 张丽霞 于丹丹 刘淑英[1] ZHANG Rui-hao;ZHAO Wei-jun;WANG Kun;JING Wen-mao;ZHANG Li-xia;YU Dan-dan;LIU Shu-ying(College of Resources and Environment,Gansu Agricultural University,Lanzhou 730070,Gansu,China;Gansu Qilian Mountain Water Source Conservation Forest Research Institute,National Positioning Observation and Research Station of Qilian Mountain Forest Ecosystem in Gansu Province,Zhangye 734000,Gansu,China;College of Global Talents,Beijing Institute of Technology,Zhuhai 519088,Guangdong,China;Liaoning Jinghua Engineering Consulting Corporation,Shenyang 110029,Liaoning,China)

机构地区：[1]甘肃农业大学资源与环境学院,甘肃兰州730070 [2]甘肃省祁连山水源涵养林研究院甘肃省祁连山森林生态系统国家定位观测研究站,甘肃张掖734000 [3]北京理工大学珠海学院中美国际学校,广东珠海519088 [4]辽宁景华工程咨询有限公司,辽宁沈阳110029

出　　处：《西北林学院学报》2023年第2期17-24,共8页Journal of Northwest Forestry University

基　　金：国家自然基金资助(32060247);高校基本科研业务费专项资金(10898XZ20201016-1、10898XZ20201016-1)。

摘　　要：基于祁连山中段排露沟流域海拔2600~3300 m的带状青海云杉林中0~10、10~20、20~40 cm的土壤TN、TP、TK的测定分析数据,运用经典统计学、地统计学的方法对其土壤TN、TP、TK含量的空间变异特征及空间分布特点进行研究。结果表明,1)研究区内土壤TN含量为1.34~8.98 g·kg^(-1),土壤TP含量为0.46~1.12 g·kg^(-1),土壤TK含量为9.75~24.17 g·kg^(-1);不同土层土壤TN、TP、TK变异系数为13.26%~35.47%,均属中等程度变异;2)10~20 cm TP的块金系数为0.617,属于中等空间相关性,其余块金系数均<0.25,具有强烈空间相关性;3)克里格插值结果显示,土壤TN、TP含量随海拔的升高而升高,土壤TK含量随海拔升高而降低。不同土层土壤TN、TP、TK含量的空间变异性特征,与海拔、土壤母质及云杉林枯落物等结构性因素有关。We conducted a research on soil total nitrogen,total phosphorus and total potassium based on the measurement and analysis of the data from the three soil layers at the depths of 0-10,10-20,and 20-40 cm from Picea crassifolia forest,located at altitudes of 2600-3300 m in the Pailugou watershed in the middle portion of the Qilian Mountain.The spatial variations and distribution characteristics of soil total nitrogen,phosphorus,and potassium were analyzed by adopting classical statistics and geostatistics methods.The results showed that 1)the contest ranges of soil total nitrogen,phosphorus,and potassium were 1.34-8.98,0.46-1.12,and 9.75-24.17 g·kg^(-1),respectively,with the variation coefficients of 13.26%-35.47%,which belonged to medium level.2)The Nugget coefficient of soil total phosphorus at the depth of 10-20 cm was 0.617,which belonged to medium spatial correlation,and the other Nugget coefficients were less than 0.25,indicating significant solid spatial correlation.3)Kriging interpolation results showed that the contents of total soil nitrogen and phosphorus increased with the increase of altitude,and the content of total soil potassium decreased with the increase of altitude.The spatial variability of soil total nitrogen,phosphorus and potassium contents in different soil layers was related to structural factors such as altitude,soil parent material and spruce forest litter.

关 键 词：土壤TN 土壤TP 土壤TK 空间变异 祁连山 青海云杉林 

分 类 号：S791.18[农业科学—林木遗传育种]