Effects of Land-Use Conversion from Double Rice Cropping to Vegetables on Methane and Nitrous Oxide Fluxes in Southern China
Yuan, Y; Dai, XQ; Wang, HM; Xu, M; Fu, XL; Yang, FT
2016
Source PublicationPLOS ONE
ISSN1932-6203
Volume11Issue:5Pages:-
AbstractCompared with CO2, methane (CH4) and nitrous oxide (N2O) are potent greenhouse gases in terms of their global warming potentials. Previous studies have indicated that land-use conversion has a significant impact on greenhouse gas emissions. However, little is known regarding the impact of converting rice (Oryza sativa L.) to vegetable fields, an increasing trend in land-use change in southern China, on CH4 and N2O fluxes. The effects of converting double rice cropping to vegetables on CH4 and N2O fluxes were examined using a static chamber method in southern China from July 2012 to July 2013. The results indicate that CH4 fluxes could reach 31.6 mg C m(-2) h(-1) under rice before land conversion. The cumulative CH4 emissions for fertilized and unfertilized rice were 348.9 and 321.0 kg C ha(-1) yr(-1), respectively. After the land conversion, the cumulative CH4 emissions were -0.4 and 1.4 kg C ha(-1) yr(-1) for the fertilized and unfertilized vegetable fields, respectively. Similarly, the cumulative N2O fluxes under rice were 1.27 and 0.56 kg N ha(-1) yr(-1) for the fertilized and unfertilized treatments before the land conversion and 19.2 and 8.5 kg N ha(-1) yr(-1), respectively, after the land conversion. By combining the global warming potentials (GWPs) of both gases, the overall land-use conversion effect was minor (P = 0.36) with fertilization, but the conversion reduced GWP by 63% when rice and vegetables were not fertilized. Increase in CH4 emissions increased GWP under rice compared with vegetables with non-fertilization, but increased N2O emissions compensated for similar GWPs with fertilization under rice and vegetables.
SubtypeJournal
Subject AreaScience & Technology - Other Topics
WOS Subject ExtendedMultidisciplinary Sciences
WOS KeywordWATER MANAGEMENT ; CH4 EMISSIONS ; GREENHOUSE GASES ; PADDY FIELD ; SOIL REDOX ; N2O ; JAPAN ; FERTILIZATION ; TEMPERATURE ; CULTIVATION
Indexed BySCI
Language英语
WOS IDWOS:000376291100134
PublisherPUBLIC LIBRARY SCIENCE
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44240
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Yuan, Y,Dai, XQ,Wang, HM,et al. Effects of Land-Use Conversion from Double Rice Cropping to Vegetables on Methane and Nitrous Oxide Fluxes in Southern China[J]. PLOS ONE,2016,11(5):-.
APA Yuan, Y,Dai, XQ,Wang, HM,Xu, M,Fu, XL,&Yang, FT.(2016).Effects of Land-Use Conversion from Double Rice Cropping to Vegetables on Methane and Nitrous Oxide Fluxes in Southern China.PLOS ONE,11(5),-.
MLA Yuan, Y,et al."Effects of Land-Use Conversion from Double Rice Cropping to Vegetables on Methane and Nitrous Oxide Fluxes in Southern China".PLOS ONE 11.5(2016):-.
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