《Table 7 Regression analysis for soil nutrients using different factors as independent variables (n=
本系列图表出处文件名:随高清版一同展现
《"Spatial variability of soil total nitrogen,phosphorus and potassium in Renshou County of Sichuan Basin,China"》
1) TN,total nitrogen;TP,total phosphorus;TK,total potassium.
Descriptive statistical parameters of the soil nutrients are shown in Table 1.The average contents of TN,TP and TK were 1.12,0.82 and 9.64 g kg–1,respectively.According to the classification criteria of soil nutrients developed during the period of the China National Soil Survey in the 1980s,soil nutrients in this study area were each at mid-range levels.In China,the mean contents of TN,TP and TK were1.54,0.74 and 18.60 g kg–1,respectively(Zhang et al.2005;Shangguan et al.2013).This indicated the study area had relatively higher levels of TP while contents of other two soil nutrients were much lower compared with their national levels.The coefficients of variation(CV)of the soil nutrients,as indices of the overall variation of heterogeneity,ranged from 30.56 to 38.75%.According to the classification standards proposed by Nielsen and Bouma(1985),all the soil nutrients had moderate variability.
图表编号 | XD0047430500 严禁用于非法目的 |
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绘制时间 | 2019.02.20 |
作者 | GAO Xue-song、XIAO Yi、DENG Liang-ji、LI Qi-quan、WANG Chang-quan、LI Bing、DENG Ou-ping、ZENG Min |
绘制单位 | College of Resources, Sichuan Agricultural University、College of Resources, Sichuan Agricultural University、College of Resources, Sichuan Agricultural University、College of Resources, Sichuan Agricultural University、College of Resources, Sichuan Agricultu |
更多格式 | 高清、无水印(增值服务) |
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