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| 生态与常规种植对土壤养分、微生物及重金属影响 |
| The effect of ecological and conventional planting pattern on soil quality |
| 投稿时间：2018-08-07 修订日期：2018-08-14 |
| DOI： |
| 中文关键词: 四川省 生态农业 常规农业 土壤质量 |
| 英文关键词: Sichuan province ecological agriculture conventional agriculture soil quality |
| 基金项目:江苏省科技计划项目(BK20140605) |
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| 中文摘要: |
| 本文比较了四川成都安龙村传统农业和生态农业种植系统,旨在对两种农业系统的土壤质量进行综合对比分析,选取土壤基础特性、微生物、肥力、重金属为指标进行研究。结果显示,1. 除细菌含量外,生态种植的土壤中微生物碳、真菌、放线菌含量均高于常规种植,表明生态种植改善了土壤中微生物种群结构；2. 生态种植土壤中重金属Cr、Pb、Hg和As含量均低于常规种植,Cd含量相差不大,表明生态种植带入的重金属较少；3. 生态种植土壤中总氮、总磷、有效氮及有效钾的含量均高于常规种植,但总钾和有效磷的含量低于常规种植,这与两种种植方式下农业投入品不同密切相关。结论为,经过3-10年的生态种植可以使土壤质量得到提升。此外,安龙村生态农户-在施用农家肥的同时,施用大量沼液、堆肥等,缓解和避开了目前农家肥带来的重金属污染的风险。 |
| 英文摘要: |
| We compared the “conventional agriculture” and “ecological agriculture” in Anlong village, which is located near Chendu, Sichuan, to obtain a comprehensive assessment of their respective effect on soil quality. Soil basic properties, microorganism, fertility and heavy metals were selected as indicators. The results showed 1. While the quantity of bacteria is lower, the quantity of microbial carbon, fungus and actinomycetes in ecological soil is higher than with conventional agriculture, which revealed the structure of microbial community got improved in ecological agriculture. 2. The quantity of heavy metal, such as Cr, Pb, Hg and As, in the soil is much lower with ecological agriculture, which indicated that the heavy metals brought by ecological planting were less. 3. With ecological farming the quantity of total nitrogen, total phosphorus, available phosphorus and available potassium in the soil is increased, but the levels of total potassium and available phosphorus are lowered, which were closely related to the different agricultural inputs. The conclusion is that the quality of soil is increased by transfering conventional agriculture to ecological agriculture for 3-10 years. Furthermore, ecological farmers noticed that manure might cause the problem of heavy metals, so they used manure, biogas slurry as well as compost, which eased the heavy metal problems. |
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