Effects of different long-term crop straw management practices on ammonia volatilization from subtro...
Effects of different long-term crop straw management practices on ammonia volatilization from subtropical calcareous agricultural soil
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Full title
Publisher
Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China
Journal title
Language
Chinese
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Publication information
Publisher
Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China
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Scope and Contents
Contents
长期秸秆还田或秸秆焚烧会显著影响土壤肥力及土壤氮素循环,但该措施对土壤氨挥发的影响仍尚不明确.本研究利用秸秆还田长期定位试验小区,研究了无秸秆配施(CK),配施100％或50％秸秆(SI1,SI2)和配施50％秸秆焚烧(SI2B)对土壤氨挥发的影响.结果 表明:氨挥发在小麦季持续38天,而玉米季持续7-10天.秸秆还田显著影响混施基肥期的土壤氨挥发而非表施追肥期.与CK相比,SI1和SI2分别降低了35.1％和16.1％的年累积氨排放,可能因为秸秆的高C/N比及较高的微生物活性促进了无机氮的固定降低土壤NH4+的浓度.SI2B比SI2增加了29.9％的氨排放.因此,长期合理的秸秆还田可为石灰性早地土壤氨挥发减排提供选择和依据.
Alternative Titles
Full title
Effects of different long-term crop straw management practices on ammonia volatilization from subtropical calcareous agricultural soil
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Record Identifier
TN_cdi_wanfang_journals_dqhhykxkb202003009
Permalink
https://devfeature-collection.sl.nsw.gov.au/record/TN_cdi_wanfang_journals_dqhhykxkb202003009
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ISSN
1674-2834
