N_2O and N_2 Production Potential in Various Chinese Agricultural Soils by Denitrification(Environment)
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概要
- 論文の詳細を見る
Eleven agricultural soils were collected from Chinese uplands and paddy fields to compare their denitrification activities under identical laboratory conditions. Before starting the assays, all air-dried soils were pre-incubated for 4 weeks at 25℃ and 40% WFPS (water-filled pore space). N_2O and N_2 production potentials in various Chinese agricultural soils by denitrification were determined by acetylene inhibition method at 25℃ and 80% WFPS for 2 d incubation, with or without KNO_3 (200 mg N kg^<-1> soil) addition. The N_2O and N_2 productions by denitrification from soils with KNO_3 addition were 0.17 and 0.35 μg N kg^<-1> d^<-1> on average, ranging between 0.04-0.55 and 0.10-1.33 μg N kg^<-1> d^<-1>, respectively. The denitrified N increased by 200 mg N kg^<-1> KNO_3-N addition was 0.22 μg N kg^<-1> d^<-1> on average and ranged between 0.01-1.40 μg N kg^<-1> d^<-1>. No relationships were found between gases productions (N_2O, N_2, and CO_2) from 3 kinds of denitrification assays and soil properties such as bulk density, total C, total N, soluble C, microbial biomass C, and NO_3^--N concentration. However the denitrified N from soils without KNO_3 addition had significantly negative correlation with the pH of soils (p < 0.05). Among 11 soils, the Ultisols acid paddy soil had the strongest denitrification activity. There was significant correlation between CO_2 production and N_2O and N_2 productions from 3 kinds of denitrification assays.
- 社団法人日本土壌肥料学会の論文
著者
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YAGI Kazuyuki
National Institute for Agro-environmental Sciences
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Tsuruta Haruo
National Institute for Agro-Environmental Sciences
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Cheng Weiguo
Department Of Bioproduction Sciences Faculty Of Horticulture Chiba University
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Cheng Weiguo
National Institute For Agro-environmental Sciences
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Tsuruta Haruo
National Institute For Agro-environmental Sciences:(present Address) Center For Climate System Resea
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Tsuruta Haruo
National Institute For Agro-environmental Sciences:(present Office)atmosphere And Ocean Research Ins
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Yagi Kazuyuki
Carbon And Nutrient Cycles Division National Institute For Agro-environmental Sciences
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AKIYAMA Hiroko
National Institute for Agro-Environmental Sciences
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Akiyama H
National Institute For Agro-environmental Sciences
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Yagi Kazuyuki
National Institute For Agro-environmental Science (niaes)
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Chen Guanxiong
Institute of Applied Ecology, Chinese Academy of Sciences
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Chen Guanxiong
Institute Of Applied Ecology Chinese Academy Of Sciences
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Yagi Kazuyuki
National Institute For Aero-environmental Sciences
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Akiyama Hiroko
Carbon And Nutrient Cycles Division National Institute For Agro-environmental Sciences
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Yagi Kazuyuki
National Inst. For Agro‐environmental Sci. Ibaraki Jpn
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Tsuruta Haruo
National Institute For Agro-environmental Sciences:(present Office)atmosphere And Ocean Research Ins
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