陕西澄城县无公害优质苹果基地环境质量现状评价

对陕西澄城县北部塬区无公害优质苹果生产基地大气、灌溉水和土壤环境质量现状进行了监测与评价。研究结果表明,无公害优质苹果生产基地的4项大气质量指标、8项灌溉水质量指标、6项土壤质量和2项农药残留指标均未超过国家《无公害食品苹果产地环境条件》限制,产地环境质量条件完全符合并能满足无公害苹果生产的要求,且果实重金属元素含量等完全符合无公害苹果卫生要求。评价结果同时表明,黄土高原空气中可悬浮颗粒物和土壤中重金属A s接近指标限制值,C r含量相比也较高,有可能成为无公害苹果生产基地大气和土壤未来的主要污染物,提出果园行间种草,株间覆盖,减少地面裸露,加强生态环境治理,严禁果园使用砷制剂,增施有机肥,避免土壤化学污染等措施。

Environmental Quality Evaluation of Environmental Friendly Apple Production Base of Chengcheng County in Shaanxi Province

Environmental quality of atmosphere,irrigation water and soil in environmental friendly quality apple production base of northern part of highland at Chengcheng county were monitored and evaluated.The results showed that four atmosphere polluters,eight irrigation water polluters,six soil polluters and two pesticide residues were all in the range of "environmental friendly apple producing environmental condition",the producing area could be used as environmentally-friendly apple production base,heavy mental elements in apple fruit completely met the demands of hygienic conditions of green fruits.The evaluating results indicated that the suspending polluters in atmosphere and arsenic in soil were near to the limited standard,cadmium in the soil was also a little bit higher,those may become the main polluters in atmosphere and soil in the future.Sod culture between rows and mulch in the row for reducing bare soil and improving ecological environmental,strictly forbidding to use asomate and other arsenic chemicals and increasing to put organic manure are proposed in order to avoid soil chemicals contamination.