摘要
以湖南浏阳大围山花岗岩风化物发育的5种类型山地土壤为研究对象,按土壤发生学划分土壤层次采集剖面土样,分析测定了土壤中铜、锌总量及其有效态含量,研究山地土壤及剖面层次中铜、锌含量的分布规律及其与土壤理化性质间的关系。结果表明,大围山山地土壤中,全铜平均含量为34.5 mg/kg,其中A层29.2 mg/kg,各剖面层次间全铜含量变化较小,分布相对均匀;而全锌平均含量为104.4 mg/kg,其中A层土壤97.2 mg/kg,小于B层或AB层全锌的含量。A层土壤中有效铜和有效锌含量分别为1.85 mg/kg和4.82 mg/kg,多数土壤有效铜低于临界值(2.0 mg/kg),而有效锌高于临界值(1.5 mg/kg)。有效铜含量随剖面变化出现表聚或淀积特征,而有效锌含量大多以A层大于AB层或B层。土壤有效铜、锌含量与土壤有机质含量之间呈正相关。总体来看,浏阳大围山多数山地土壤锌较丰富,而铜较缺乏。
To investigate the profile distribution of soil copper and zinc contents and their correlations with soil physicochemical properties, five soils derived from weathered granite were selected in Dawei Mountain of Liuyang City in Hunan Province. Soil samples were collected at different pedogenic layers and analyzed. Our results showed that the content of total soil copper only varied slightly through soil profiles, with a mean of 34.5 mg/kg for the whole soil profile and a mean of 29.2 mg/kg for the A horizon. The average content of total soil zinc was 104.4 mg/kg for the whole soil profile, and was lower in the A horizon （97.2 mg/kg） than in the B or AB horizon. At the A horizon, the mean content of soil available copper was 1.85 mg/kg, and most of the measurements were lower than the critical value of 2 mg/kg; while the mean content of soil available zinc was 4.82 mg/kg, most of the measurements were higher than the critical value of 1.5 mg/kg. Generally, the soil available copper concentrated on the surface layer or deposited in subsurface layers, but the content of soil available zinc was always higher in the A horizon than in the AB or B horizon. The correlation analysis showed that both the contents of soil available copper and available zinc were positively correlated with the content of soil organic matter. In summary, most soils in Dawei Mountain were relatively rich in zinc and deficient in copper.
出处
《农业现代化研究》
CSCD
北大核心
2014年第4期477-480,共4页
Research of Agricultural Modernization
基金
湖南省科技厅科技支持计划重点项目(2010NK2006)
关键词
铜
锌
剖面分布
大围山
浏阳
Cu
Zn
profile distribution
Dawei Mountain
Liuyang County
