| 引用本文: | 王月清,赵 京,黄玉茹,等.添加生物质炭对猪场废水灌溉土壤养分状况及铅有效性的影响[J].灌溉排水学报,2021,(3):87-93. |
| WANG Yueqing,ZHAO Jing,HUANG Yuru,et al.添加生物质炭对猪场废水灌溉土壤养分状况及铅有效性的影响[J].灌溉排水学报,2021,(3):87-93. |
|
| 摘要: |
| 【目的】为养猪废水安全灌溉提供科学依据。【方法】试验选取新乡郊区农田0~20 cm表层土壤，采用PVC根箱法种植小麦，试验设置4种水平的生物质炭添加量0%、0.5%、2%、5%（W0、W0.5、W2、W5）和对照CK（无作物和生物质炭）。测定了各处理根际和非根际土壤养分状况与含铅量，探讨了处理间土壤养分状况和铅迁移规律的差异特征。【结果】与CK相比，施加生物质炭改善了土壤理化性状，W2和W5处理显著增加了土壤有机质量、碱解氮量、速效磷量与速效钾量，尤其是非根际土壤的增幅更大。同时，施加生物质炭处理能够降低土壤有效铅量，W2和W5处理土壤有效铅量降幅较大，达20.7%~33.3%，且非根际土壤有效铅量显著低于根际土壤。【结论】对于北方碱性土壤，灌溉养猪废水时添加适量的生物质炭（W2），能够改善土壤理化性质，降低铅的生物有效性，减少向植物体内的迁移。 |
| 关键词: 有效态铅；生物质炭；养猪废水；土壤养分状况 |
| DOI：10.13522/j.cnki.ggps.2020449 |
| 分类号: |
| 基金项目: |
|
| Amending Soil with Biochar Increases Soil Nutrients and Reduce Pb Mobility in Soil Irrigated with Piggery Wastewater |
|
WANG Yueqing, ZHAO Jing, HUANG Yuru, GAO Qing,SUN Xianghui, CAI Hanyu, CUI Shihui, DU Zhenjie
|
|
1. Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China;2. Agriculture Water and Soil Environmental Field Science Research Station of Xinxiang City of Henan Province of CAAS,Xinxiang 453002, China; 3. Laboratory of Organic Solid Waste Treatment and Resource Utilization, Henan Institute of Technology, Xinxiang 453003, China; 4. Bureau of Agriculture and Rural Affairs, Huojia 453800, China;5. Xinxiang Research Academy of Environmental Science and Design, Xinxiang 453002, China
|
| Abstract: |
| 【Background】Piggery wastewater is rich in organic matter and nutrients, and it can be used as a supplementary water source for irrigation. But it also contains various organic and inorganic contaminants, and irrigating with it risks soil and crop contamination. How to make most of the piggery wastewater while in the meantime ameliorating dissemination of its pollutants is thus critical to its safe use and has been studied intensively over the past decade.【Objective】The objective of this paper is to study the feasibility and efficacy of using biochar amendment to improve soil nutrients and reducing Pb mobility in soil irrigated with piggery wastewater.【Method】The experiment was conducted in rhizobox and used winter wheat as the model plant. It consisted of four treatments with soil amended with biochar at a ratio of 0, 0.5%, 2% and 2.5% respectively; a treatment without fertilization was taken as the control. In each treatment, we measured the change in organic matter, available N, P and K, as well as mobile Pb in the rhizosphere and bulk soils.【Result】Biochar amendment improved physical properties of the soil. Compared with the control, amending the soil with 2% and 5% of biochar significantly increased the content of organic matter, available N, P and K, especially in the bulk soil, while in the meantime reducing the mobile Pb by 20.7%~33.3%. It was also found that Pb content in the rhizosphere was higher than that in the bulk soil, indicating that it was root uptake rather than Pb mobility that limited Pd uptake and its translocation in the plant.【Conclusion】Biochar amendment of the alkaline soil irrigated with piggery wastewater as studied in this paper can improve physicochemical properties of the soil, and reduced Pb bioavailability thereby ameliorating its root uptake and translocation in winter wheat. |
| Key words: Pb bioavailability; biochar amendment; piggery wastewater; soil nutrients |
