Background value of soil nutritive elements in tea gardens in the north of Sichuan Province
By using the ICP-AES,the content of 16 kinds of inorganic nutritive elements were mensurated for the soils of 133 tea gardens in 25 counties or sections in the north of Sichuan Province,the characters of the background value of nutritive elements were emphasized.The result showed that the contents of S,P,K,Ca and Ti were all inadequate evidently.Sb and Se were enrichment relatively,the coefficients of enrichment were 9.47 and 5.38 respectively.The content of other elements such as Al,Mg,Mn were corresponded to the background of soil in China.The background value of nutritive elements changed in the different soils.Sb and Zn were significant differently for the different soils.The content of S and Sb were high in the gritstone soil,K,Mg,Ca,Se,Ti were high in the acidic purple soil,the Al and Mo were high in the yellow soil,and the P,Mn,V,B,Zn,Co and N were high in the brown soil,respectively.