| 引用本文: | 杨乐,曹辉,付媛媛,等.交替滴灌配施硝化抑制剂对夏玉米土壤氨挥发和土壤酶活性的影响[J].灌溉排水学报,0,():-. |
| YANG Le,CAO Hui,FU Yuanyuan,et al.交替滴灌配施硝化抑制剂对夏玉米土壤氨挥发和土壤酶活性的影响[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【摘 要：【目的】寻求灌水方式和施加硝化抑制剂3,4-二甲基吡唑磷酸（DMPP）对施肥后夏玉米田土壤氨挥发动态变化的影响和土壤氮素转化过程中的关键驱动因子土壤酶活性的影响，【方法】采用通气法，设置常规浅埋滴灌施加DMPP（DI+DMPP）、浅埋交替滴灌施加DMPP（ADI+DMPP）、常规浅埋滴灌不施加DMPP（DI+NO）、浅埋交替滴灌不施加DMPP（ADI+NO）共4个处理，在带有防雨棚的测坑中研究灌水方式与添加硝化抑制剂对玉米生育期内氨气（NH3）挥发速率、NH3挥发累积量和土壤酶活性的影响。【结果】1）在玉米不同生育阶段，灌水方式和施加DMPP对NH3挥发速率的影响不同，其中，施加DMPP可显著提高拔节期、抽雄期、灌浆期的土壤NH3挥发速率；交替滴灌只对大喇叭口期的土壤NH3挥发速率有显著降低作用。2）交替滴灌较常规滴灌显著降低了12.70%~45.45%的NH3挥发累积量，然而，施加DMPP处理对玉米土壤NH3挥发累积量有显著促进作用。3）玉米抽雄期，交替滴灌能有效提高玉米根区土壤过氧化氢酶、碱性磷酸酶、FDA水解酶活性，对脲酶活性无显著影响；施加DMPP未对土壤根区附近酶活性产生显著影响。【结论】采取ADI+NO的组合处理在NH3减排方面效果最优。 |
| 关键词: 玉米;交替滴灌;硝化抑制剂;氨挥发 |
| DOI： |
| 分类号:S274，S145 |
| 基金项目:国家现代农业产业技术体系项目(CARS-02-18),河南省自然科学基金面上项目 (202300410553),中国农业科学院科技创新工程(ASTIP) |
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| Effects of alternative drip-irrigation combined with nitrification inhibitor and soil enzyme activity of on ammonia volatilization from summer maize field |
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YANG Le, CAO Hui, FU Yuanyuan, ZHANG Yingying, LIU Zhandong, GAO Yang
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Institute of Filed irrigation,Chinese Academy of Agricultural Sciences,Xinxiang
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| Abstract: |
| Abstract: 【Objective】 To find out the influence of irrigation methods and nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) on the dynamic change of ammonia volatilization in summer maize field soil after fertilization and the influence of soil enzyme activity, which is the key driving factor in this process,【Method】Situ experiments method was used to set up four treatments: DMPP applied to conventional shallow drip irrigation(DI+DMPP), DMPP applied to alternate shallow drip irrigation (ADI+DMPP), DMPP not applied to conventional shallow drip irrigation(DI+NO), and DMPP not applied to alternate shallow drip irrigation(ADI+NO). The effects of irrigation methods and nitrification inhibitors on NH3 volatilization rate, NH3 volatilization accumulation and soil enzyme activities during maize growth period were studied by applying nitrification inhibitors DMPP to four treatments under shallow alternate drip irrigation in the leaching-pond under the rainproof shed.【Result】1）Different irrigation methods and whether DMPP is applied or not have different effects on NH3 volatilization rate at different growth stages of maize. The application of DMPP treatment can significantly improve the soil NH3 volatilization rate at jointing stage, heading stage and filling stage; alternative drip irrigation treatment can only significantly reduce the NH3 volatilization rate of soil at booting stage. 2）Compared with DI, ADI significantly reduced the ammonia volatilization accumulation by 12.70% ~ 45.45%. However, DMPP treatment significantly increased the ammonia volatilization.3) At the heading stage of maize, alternative drip irrigation could effectively improve the activities of catalase, alkaline phosphatase and FDA hydrolase in the soil of maize root zone, but had no significant effect on urease activity; Nitration inhibitor DMPP had no significant effect on soil enzyme activity near root zone. 【Conclusion】The combination treatment of alternating ADI+NO is the best in ammonia volatilization and emission reduction.
Key Words: maize; alternate drip irrigation; DMPP; ammonia volatilization |
| Key words: maize; alternate drip irrigation; DMPP; ammonia volatilization |
