文章摘要
龚静静, 靳玉婷, 胡宏祥, 朱昌雄, 高梦瑶.稻秸还田对油菜季径流氮磷及COD流失的影响[J].水土保持学报,2019,33(4):24~29
稻秸还田对油菜季径流氮磷及COD流失的影响
Effects of Rice Straw Incorporation on Nitrogen, Phosphorus and COD Loss in Rape Seasonal Runoff
投稿时间:2019-01-04  
DOI:10.13870/j.cnki.stbcxb.2019.04.004
中文关键词: 秸秆还田  氮素  磷素  COD  流失  微生物数量
英文关键词: straw incorporation  nitrogen  phosphorus  COD  loss  microbial quantity
基金项目:国家"十三五"水体污染控制与治理科技重大专项(2017ZX07603-02-02)
作者单位E-mail
龚静静1,2, 靳玉婷1, 胡宏祥1, 朱昌雄2, 高梦瑶1 1. 安徽农业大学资源与环境学院, 合肥 230036

2. 中国农业科学院农业环境与可持续发展研究所
, 北京 100081 
hongxianghu@163.com 
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中文摘要:
      通过田间小区试验,设置CK (无施肥+无秸秆)、F (常规施肥)、SF (秸秆还田+常规施肥)和SFR (秸秆还田+常规施肥减15%)4个处理,研究在巢湖地区稻油轮作模式下,稻秸还田对油菜季农田径流氮磷及化学需氧量(COD)流失影响。结果表明,秸秆还田处理显著增加土壤微生物细菌、真菌和放线菌数量,显著降低径流总氮浓度,但增加总磷和COD含量,土壤微生物数量与径流氮磷及COD含量呈显著正相关关系。与F处理相比,SF、SFR处理总氮流失量分别减少16.9%~19.8%,27.1%~29.3%,总磷流失量分别降低2.4%~4.0%,4.0%~5.6%,COD流失量分别增加6.1%~10.0%,2.8%~6.1%。研究结果为揭示土壤微生物数量与径流氮磷及COD流失的作用机理提供了参考,为合理利用秸秆还田技术提供了理论依据。
英文摘要:
      In the field plot experiment,four treatments, including CK (no fertilization+no straw), F (conventional fertilization), SF (straw incorporation+conventional fertilization) and SFR (straw incorporation+conventional fertilization reduced by 15%) were set up to study the effects of rice straw incorporation on nitrogen, phosphorus and chemical oxygen demand (COD) loss through runoff in rapeseed season under rice-rape rotation mode in Chaohu Lake region. The results showed that straw incorporation treatment significantly increased the number of soil microbial bacteria, fungi and actinomycetes, significantly reduced the total nitrogen concentration in runoff, but increased the total phosphorus and COD contents. The number of soil microorganisms was positively correlated with the content of nitrogen, phosphorus and COD in runoff. Compared with F treatment, total nitrogen loss decreased by 16.9%~19.8% and 27.1%~29.3%, total phosphorus loss decreased by 2.4%~4.0% and 4.0%~5.6%in the SF treatment and SFR treatment, while the COD loss increased by 6.1%~10.0% and 2.8%~6.1%, respectively.The results provided a reference for revealing the mechanism of soil microbial biomass and the loss of nitrogen, phosphorus and COD in runoff, and provided a theoretical basis for the rational use of straw incorporation technology.
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