| 畜禽粪便有机肥中Cu、Zn在不同农田土壤中的形态归趋和有效性动态变化 |
| 摘要点击 3381 全文点击 1179 投稿时间：2014-06-08 修订日期：2014-08-17 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 畜禽粪便施肥 Cu Zn 形态归趋 有效性 农田土壤 |
| 英文关键词 livestock and poultry manure copper zinc form tendency bio-availability farm soils |
|
| 中文摘要 |
| 通过土壤培养试验,研究了不同畜禽粪便有机肥中重金属 Cu、Zn在不同农田土壤中的形态归趋和有效性动态变化过程,为合理确定由畜禽粪便有机肥带入农田土壤的重金属负荷,科学评价畜禽粪便有机肥中重金属进入土壤后的生态风险提供理论依据. 结果表明,土壤中施用畜禽粪便有机肥后,酸性土壤 pH值升高,而石灰性土壤 pH值降低. 施用鸡粪后 6个月内,有效态 Cu含量在 2种土壤中显著低于等量 Cu无机盐处理,而有效态 Zn含量则与等量 Zn无机盐处理无显著差异; 施用猪粪后 6个月内,有效态 Cu和 Zn含量在 2种土壤中均与等量 Cu和 Zn无机盐处理无显著差异. 形态归趋研究表明,通过畜禽粪便有机肥进入土壤中的 Cu和Zn在土壤中主要以交换态、碳酸盐结合态、铁锰氧化物结合态以及有机结合态的形式存在,且畜禽粪便有机肥的来源不同,各形态 Cu和Zn在不同土壤中所占比例不同. 土壤中施用畜禽粪便有机肥 6个月时, Cu和Zn交换态以及铁锰氧化物结合态所占比例低于等量 Cu和Zn无机盐处理,而有机结合态所占比例高于等量 Cu和Zn无机盐处理,其它形态与无机盐处理无显著差异. |
| 英文摘要 |
| Soil incubation experiments were conducted with different sources of manures containing heavy metals to evaluate the bioavailability of heavy metals(Cu and Zn) and their form transformation in different soils. This study may assist in developing strategies to ascertain the loads of heavy metals which entered into soils together with manures, and promote policies to evaluate the ecological risk in agriculture soils. The results showed that, during the six months of soil incubation, the pH value of acidic soil increased and the pH value of calcareous soil reduced. After adding chicken manures, the contents of available Cu in both calcareous and acid soils were significant lower than those in the equivalent inorganic salt treatments, but there was no significant difference between the treatments in the contents of available Zn in both calcareous and acid soils. Furthermore, there were also no significant differences between pig matures and the equivalent inorganic salt treatments in the contents of available Cu and Zn in both calcareous and acid soils. The results of form tendency showed that the main forms of Cu and Zn in both calcareous and acid soils, which entered into soils together with manures, were exchangeable, carbonate, Fe-Mn oxides, and organic. And the proportions of different heavy metals species in calcareous and acid soils were different with different manures sources. After six months of incubation, the contents of exchangeable and Fe-Mn oxides Cu, Zn were lower than those in the equivalent inorganic salt treatments, the contents of organics Cu and Zn were higher than those in the equivalent inorganic salt treatments, and other Cu and Zn forms in soils showed no difference with inorganic salt treatments. |
|
|
|
