咸阳市蔬菜温室土壤有效微量元素变化特征分析

Analysis on Variation Characteristics of Available Microelements in Vegetable Greenhouse Soil in Xianyang

对咸阳市三原、泾阳、兴平、秦都等地蔬菜主产区不同利用年限的蔬菜日光温室24个样点的土壤有效微量元素变化特征进行调查研究。结果表明：土壤有效B、Cu、Zn、Mn、Fe的含量范围依次为0.11-0.56、1.50-6.94、2.90-11.79、13.49-30.93、8.53-44.00 mg/kg,变异系数为27%-47%。随温室利用年限的增加,土壤有效Zn、B含量总体上呈增加趋势,土壤有效Fe、Mn、Cu含量与棚龄呈负相关;土壤有效Cu、Zn、Mn、Fe的含量较高,Cu、Zn超量风险较高,有效B含量较低。蔬菜温室土壤母质、pH、Eh、施肥习惯、管理水平等的差异,是导致土壤有效微量元素变异较大的主要因素。

The variation characteristics of available microelements in 24 vegetable solar greenhouse soil samples with different utilization years were investigated in Sanyuan,Jingyang,Xingping,Qindu of Xianyang vegetable producing areas.The results showed that the contents of soil available B,Cu,Zn,Mn,Fe were0.11 - 0.56,1.50 - 6.94,2.90 - 11.79,13.49 - 30.93,8.53 - 44.00 mg/kg respectively with the variation coefficients of 27% - 47%.With the increase of utilization years of greenhouse,the soil available Zn,B showed an increasing trend on the whole,While the contents of soil available Fe,Mn,Cu were negatively correlated with the utilization years of greenhouse.The contents of soil available Cu,Zn,Mn,Fe were higher.The excess risk of soil Cu,Zn was relatively higher.The available B content was lower.The differences of vegetable greenhouse soil parent material,pH,Eh,fertilizing habits and management levels were main factors resulting in large variations of soil available microelements.