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| 滇西陇川县耕地土壤环境质量分析评价 |
| Cultivated Land Soil Environment Quality Analysis and E valuation in Longchuan County, Yunnan Province, China |
| 投稿时间：2013-04-29 |
| DOI： |
| 中文关键词: 土壤肥力 土壤重金属 污染指数法 绿色食品 |
| 英文关键词: soil fertility heavy metals in soil pollution index method green food |
| 基金项目:云南省农产品质量安全专项“农产品产地环境质量评价整体推进”项目(2130109) |
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| 中文摘要: |
| 为揭示滇西地区土壤环境质量状况,以陇川县为例,参照《绿色食品产地环境技术条件》,对耕地土壤pH值、有机质、全氮、速效磷、速效钾营养元素含量及重金属元素铅、镉、汞、砷、铬、铜总量进行测定分析。采用标准对比法、单因子污染指数法和Nemero综合污染指数法,对其土壤环境质量进行了评价。结果表明,研究区土壤pH值介于3.49~7.45之间,均值为5.05,土壤偏酸;各营养元素平均值中有机质、全氮、速效磷含量为优良,速效钾含量为中等,有机质、全氮、速效磷、速效钾含量分别有64.17%、59.34%、75.33%、71.66%的耕地面积达到生产绿色食品土壤肥力要求,分别有35.83%、40.66%、24.67%、28.34%的面积土壤肥力不足;采用单因子污染指数法对土壤重金属评价,砷、铬、铜处于清洁状态;有20.27%、2.03%、4.73%的样本铅、镉、汞单因子污染指数大于1,所代表的面积受到铅、镉、汞轻度污染,镉有1.35%样本单因子污染指数大于2,所代表的面积受到镉中度污染;综合污染指数评价,4.79%样本达到轻度污染。 |
| 英文摘要: |
| In order to reveal the status of the quality of soil environment in the western area of Yunnan Province, Taking Longchuan County as an example, refering to"green food producing area environment technical specifications", soil pH value, organic matter, total nitrogen, avail-able phosphorus, available potassium content of nutrient elements and heavy metals such as lead, cadmium, mercury, arsenic, chromium, copper volume were measured and analyzed. Using the standard comparison method, the method of single factor pollution index and compre-hensive pollution index method of Nemero, the soil environmental quality was evaluated. The results showed that, the soil pH ranged from 3.49 to 7.45, the mean value was 5.05,with acid soil nutrient elements. The average value of organic matter, total nitrogen, available phospho-rus content was high, the content of rapidly available potassium was medium. Organic matter, total nitrogen, available phosphorus, available potassium content were 64.17%, 59.34%, 75.33%, 71.66%of the area of cultivated land respectively, which was agree to produce green food soil fertility requirements, and 35.83%, 40.66%, 24.67%, 28.34%of the area was of poor soil fertility respectively. Assessing the heavy metals in soil by using the single factor pollution index method, arsenic, chromium, copper was in a clean state,lead, cadmium, mercury single factor pollution index was 20.27%, 2.03%, 4.73%higher than 1, which represented the lead, cadmium, mercury as light pollution. There was 1.35%sample cadmium single factor pollution index greater than 2,which represented the cadmium pollution as medium. Comprehensive pollution index evaluation showed that there was 4.79%samples reached the light pollution standard. |
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