| 引用本文: | 高俊莲,王永生,张爱平,等.生物质炭对稻田氮素淋失和氧化亚氮排放的影响[J].灌溉排水学报,2017,36(6):. |
| GAO Junlian,WANG Yongsheng,ZHANG Aiping,et al.生物质炭对稻田氮素淋失和氧化亚氮排放的影响[J].灌溉排水学报,2017,36(6):. |
|
| 摘要: |
| 为降低农田面源污染和温室气体排放，通过田间试验研究了优化施氮情况下，添加不同剂量生物质炭（0、4.5、9、13.5 t/hm2）对宁夏引黄灌区稻田土壤氮素淋失和土壤N2O排放的影响。结果表明，添加生物质炭显著降低了100 cm土层处的硝态氮和铵态氮淋失量，降低比例分别为18.23%～26.02%和28.86%～52.05%。与C0处理相比，C1处理（4.5 t/hm2）对土壤N2O累计排放量影响不显著，但C2处理（9 t/hm2）和C3处理（13.5 t/hm2）土壤N2O累计排放量显著降低了25.13%和28.88%。添加生物质炭可增加水稻产量和吸氮量，降低土壤硝态氮和铵态氮量以及土壤体积质量，是引起土壤氮素淋失降低和土壤N2O排放减少的重要原因之一。综合考虑生物质炭对土壤氮素淋失和土壤N2O排放的影响以及生产成本，宁夏引黄灌区的生物质炭推荐添加量为9 t/hm2。 |
| 关键词: 生物质炭； 宁夏； 引黄灌区； 稻田； 氮淋失； 氧化亚氮 |
| DOI： |
| 分类号: |
| 基金项目: |
|
| Impact of Biochar on Nitrogen Leaching and Nitrous Oxide Emission in Paddy Soils |
|
GAO Junlian, WANG Yongsheng, ZHANG Aiping, ZHU Donghai, LIU Ruliang
|
|
College of Geoscience and Surveying Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China; Institute of Geographic Science and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; Institute of Environment and Sustainable Development in Agriculture, CAAS, Beijing 100081, China; Farmland Irrigation Research Institute, Chinese Academy of Aricultural Sciences, Xinxiang 453002, China;.Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750000, China
|
| Abstract: |
| Nitrogen leaching and emission as greenhouse gases are an important environmental issue in agricultural production. This paper investigated how optimizing fertilization and amending soil with biochar could reduce nitrate leaching and N2O emission from a paddy field in Yellow River Irrigation Region inNinxia. Biochar was applied to soil at three rates (4.5, 9 and 13.5 t/hm2 per years), and no biochar amendment was taken as the control. The results showed that biochar amendment reduced leaching of nitrate and ammonium by 18.23%～26.03% and 28.86%～52.05% respectively. The C1 treatment (4.5 t/hm2) did not significantly reduce N2O emissions, but C2 (9 t/hm2) and C3 (13.5 t/hm2) did and reduced accumulative N2O emission by 25.13% and 28.88%, respectively. Amending soil with biochar increased the uptake of nitrogen by plant roots, thereby reducing nitrate and ammonium in soil as well as soil density, which is the main reason behind the reduction in nitrogen leaching and emissions from soil. Our results revealed that amending the paddy soil with biochar at 9 t/hm2 can effectively increase nitrogen uptake and reducenitrogen loss as a result. |
| Key words: biochar; Ningxia Yellow River irrigation region; nitrogen leaching; nitrous oxide emission |
