【摘要】 通过对香榧Torreya grandis‘Merrillii’林地土壤及香榧子的取样分析得出:①香榧林地土壤中的全氮、全磷、全钾和水解氮的质量分数较为丰富,速效钾相对不足;铁(Fe),硼(B),锰(Mn)等营养元素丰富,且变异系数较小;镉(Cd)和汞(Hg)没有检出,砷(As),铬(Cr)和铜(Cu)的变异系数较大,而锌(Zn)和铅(Pb)的变异系数较小;As,Cr,Cu,Pb的质量分数有个别土样超标。②香榧子中氮(N),磷(P),钾(K),钙(Ca),镁(Mg)等元素的质量分数较高,且样品间变异系数均在16%以下;Mn,Cu和Zn的质量分数也较丰富,样品间变异系数小;Fe和B等元素的变异系数较大,分别为147.69%和112.99%;Cu,Zn和Hg的质量分数在安全范围以内,Pb和Cr未检出,仅个别样品As超标。③除了土壤中的Ca与香榧子中的Ca,Fe和N等元素间存在极显著和显著的相关性外,多数元素在土壤与香榧子之间相关性不显著。表8参19更多还原

【Abstract】 Studies were carried out on mineral elements in Torreya grandis’Merrillii’ seeds and their forest soils.The results are the following.(1) In the soils,total nitrogen,total phosphorus and hydrolytic nitrogen are rich,while available potassium insufficient.Ferrum,boron,manganese are rich and coefficients of variation are small.Cadmium and hydragyrum are undetectable,coefficients of variation of arsenic,chromium,cuprum are big while those of zinc and plumbum small,and in some soil samples,the contents of arsenic,chromium,cuprum and plumbum exceed the standard.(2) In the seeds,nitrogen,phosphorus,potassium,calcium and magnesium are abundant and their coefficients of variation are under 16%.Manganese,cuprum and zinc are plentiful,and the coefficients of variation are small,while those of ferrum and boron are between 147.69% and 112.99%,respectively.Among the heavy metals,cuprum,zinc and hydragerum contents are under the safe line,and plumbum and chromium are undetectable.Only arsenic content excesses the standard in some samples.(3) Of most mineral element contents, there are no correlations between the soils and the seeds,except those of calcium and ferrum and nitrogen.更多还原