国立研究開発法人 国際農林水産業研究センター | JIRCAS

Effects of Rice Husk Charcoal Application on Rice Yield, Methane Emission, and Soil Carbon Sequestration in Andosol Paddy Soil

JARQ : Japan Agricultural Research Quarterly
ISSN
00213551
書誌レコードID(総合目録DB)
AA0068709X
本文フルテキスト

Biochar application is an effective option for promoting soil carbon sequestration. Rice husk charcoal (RC) produced from pyrolysis of rice husk (RH) is characterized by a higher silicon content as compared to wood-derived biochar. A study was conducted using pots to evaluate the short-term effects of RC application at 0, 0.4, 2.0, 4.0, 20.0, and 40.0 g pot-1 (CONT, RC0.4, RC2, RC4, RC20, and RC40, respectively), or RH application at 4.0 g pot-1 (RH4) on rice yield, methane (CH4) emission, and soil carbon sequestration in an Andosol paddy soil. The results showed that the significant increase in brown rice yield with RC40 was attributed to increases in the grain number and percentage of ripened grains. Plants treated with RC20 or RC40 absorbed greater amounts of silicon than those treated with lower RC rates. RC application did not significantly increase CH4 emission. The soil carbon content after rice cultivation increased in proportion to the RC application rate. The balance between cumulative CH4 emission and soil carbon sequestration, based on the 100-year global warming potential, suggested that RC40 served as CO2-equivalent sink. No differences were observed in the measured parameters between RH4 and RC4. These findings suggest that the higher rates of RC application in the RC20 and RC40 treatments function as a silicon fertilizer while promoting soil carbon sequestration.

刊行年月2016-10-01
作成者Shinichi KOYAMATakuto KATAGIRIKazunori MINAMIKAWAMorio KATOHisayoshi HAYASHI
著者キーワード

biochar

C-N ratio

global warming

greenhouse gas emissions

silicon

公開者Japan International Research Center for Agricultural Sciences
データ作成日2016-10-01
国立情報学研究所メタデータ主題語彙集(資源タイプ)Journal Article
50
4
開始ページ319
終了ページ327
DOI10.6090/jarq.50.4
権利Japan International Research Center for Agricultural Sciences
関連するリソース : J-STAGE
言語eng