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崔静雅,颜明娟,吴晓荣,王慎强,倪 康,蔡祖聪,张金波,程 谊.林地改为茶园对土壤净硝化速率及N2O排放的影响[J].土壤,2017,49(4):738-744. CUI Jingya,YAN Mingjuan,WU Xiaorong,WANG Shenqiang,NI Kang,CAI Zucong,ZHANG Jinbo,CHENG Yi.Effects of Woodland Transforming into Tea Garden on Soil Net Nitrification Rate and N2O Emission[J].Soils,2017,49(4):738-744 本文二维码信息
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林地改为茶园对土壤净硝化速率及N2O排放的影响
Effects of Woodland Transforming into Tea Garden on Soil Net Nitrification Rate and N2O Emission
投稿时间:2016-07-06  修订日期:2016-08-27
DOI:10.13758/j.cnki.tr.2017.04.015
中文关键词:  种植年限  茶园  林地  净硝化速率  N2O累积排放量
Key Words:Planting ages  Tea garden  Woodland  Soil net nitrification rate  Soil cumulative N2O emission
基金项目:国家自然科学基金项目(41671231,41571294)、国家重点研发计划项目(2017YFD0800103,2017YFD0200106)和土壤与农业可持续发展国家重点实验室开放课题(Y412201421)资助。
作者单位E-mail
崔静雅 南京师范大学环境学院 cuijingya04@163.com 
颜明娟 福建省农业科学院土壤肥料研究所  
吴晓荣 宝鸡文理学院地理与环境学院  
王慎强 土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所)  
倪 康 中国农业科学院茶叶研究所  
蔡祖聪 南京师范大学地理科学学院  
张金波 南京师范大学地理科学学院  
程 谊 土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所) ycheng@issas.ac.cn 
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中文摘要:
      以我国江南茶区(安徽、浙江)和华南茶区(福建)典型茶园土壤及各自相邻的林地土壤为研究对象,在25℃和60%田间持水量条件下,通过28 d的室内培养试验,研究了林地改为茶园后对土壤净硝化速率及N2O排放规律的影响。结果表明:安徽地区林地改种茶园显著抑制了净硝化速率;与安徽地区的林地和茶园土壤相比,浙江和福建地区林地和茶园土壤净硝化速率很低(N,<0.2 mg/(kg·d)),且林地改为茶园后对土壤净硝化速率没有显著影响。安徽地区植茶年限超过10 a的茶园土壤N2O累积排放量均显著低于邻近的林地土壤,而植茶年限为10 a的茶园土壤与邻近的林地土壤差异不显著。浙江和福建茶园土壤N2O累积排放量均高于各自对照的林地土壤。安徽地区土壤的N2O累积排放量与pH呈显著的正相关关系,这表明林地改为茶园后,随着植茶年限的增加和氮肥的施用,pH降低抑制了净硝化速率,进而降低N2O排放。
Abstract:
      An incubation experiment at 25℃ and 60% water holding capacity was conducted to investigate soil net nitrification rate and N2O emission in typical tea gardens and adjacent woodlands in Anhui, Zhejiang and Fujian provinces. The results indicated that woodland transforming into tea garden significantly decreased soil net nitrification rates in Anhui Province, whereas soil net nitrification rates in tea gardens and adjacent woodlands in Zhejiang and Fujian provinces were very low (N , <0.2 mg/(kg·d)), and were insignificantly different between tea gardens and woodlands. In Anhui Province, soil cumulative N2O emissions over the 28-day incubation in tea gardens with 10 years more of plantation ages were significantly lower than adjacent woodlands, while there was no difference in soil cumulative N2O emission between tea garden with 10 years of plantation and adjacent woodland. In Zhejiang and Fujian provinces, soil cumulative N2O emissions over the 28-d incubation in tea gardens were higher than adjacent woodlands. Soil cumulative N2O emission had significant positive correlation with pH value in Anhui Province, which indicates that woodland transformed into tea garden decreases soil pH, and thus decreases soil net nitrification rate and N2O emission in Anhui Province.
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