Effect of Application of Rice Straw and Cellulose on Methane Emission and Biological Nitrogen Fixation in a Subtropical Paddy Field : I. Methane Emission, Soil-ARA, and Rice Plant Growth
スポンサーリンク
概要
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A field experiment was conducted to evaluate the effect of the incorporation of rice straw and cellulose on methane flux, soil-acetylene reduction activity (ARA) and rice plant growth under a subtropical climate. Rice straw and cellulose (as paper) were applied at the rates of 4 and 10t ha^<-1>. Emission rates of CH_4 from the paddy field without and with straw and cellulose amendments were measured by using the closed chamber method. Stimulation of N_2-fixation by the amendments was measured as soil-ARA under anaerobic conditions. The measurements indicated that the application of 10t ha^<-1> cellulose resulted in a relatively high emission of CH_4, with an average flux of 106.7mg CH_4 m^<-2> h^<-1> followed by 10t ha^<-1> straw, 51.7mg m^<-2> h^<-1> compared with the control, 5.3mg m^<-2> h^<-1>. Application of straw and cellulose at the rate of 10t ha^<-1> to the paddy field increased the CH_4 emission 10 and 21 fold over the values of the control, respectively as estimated seasonal emissions. The soil-ARA levels in the treatments during the cultivation period were positive. The stimulation of ARA by the amendment with 10t ha^<-1> cellulose occurred at the early stage of rice growth, while the maximum ARA-peak occurred in the 10t ha^<-1> straw-amended soil at around the heading stage. Amendment with straw at 10t ha^<-1> significantly increased the total dry matter weight of rice, whereas growth inhibition was induced by cellulose incorporation. The differences in CH_4 flux, and soil-ARA among the treatments were most evident at the heading stage.
- 社団法人日本土壌肥料学会の論文
著者
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Adachi Katsuki
Japan International Research Center for Agricultural Sciences, Okinawa Subtropical Station
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Senboku Toshihiro
Japan International Research Center for Agricultural Sciences, Okinawa Subtropical Station
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Adachi K
National Agricultural Res. Center For Kyushu Okinawa Region Miyazaki Jpn
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Adachi Katsuki
Japan International Research Center For Agricultural Sciences Okinawa Subtropical Station
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OYEDIRAN Gbade
Department of Agronomy, Ladoke Akintola University of Technology
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Oyediran Gbade
Department Of Agronomy Faculty Of Agricultural Science Ladoke Akintola University Of Technology
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Senboku T
Japan International Research Center For Agricultural Sciences Okinawa Subtropical Station
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- Effect of Application of Rice Straw and Cellulose on Methane Emission and Biological Nitrogen Fixation in a Subtropical Paddy Field : II. Enumeration of Populations of Methanogenic Bacteria by Most Probable Number Method and Roll Tube Method
- Effect of Application of Rice Straw and Cellulose on Methane Emission and Biological Nitrogen Fixation in a Subtropical Paddy Field : I. Methane Emission, Soil-ARA, and Rice Plant Growth
- Effect of Application of Rice Straw and Cellulose on Methane Emission and Biological Nitrogen Fixation in a Subtropical Paddy Field : III. Populations of Methane-Oxidizing Bacteria in Soil and Rice Rhizosphere
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