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Effects of biochar on methane emission, grain yield, and soil in rice cultivation in Thailand
Carbon Management ( IF 3.1 ) Pub Date : 2021-03-24 , DOI: 10.1080/17583004.2021.1885257
Patikorn Sriphirom 1, 2 , Amnat Chidthaisong 1, 2, 3 , Kazuyuki Yagi 1, 2 , Sudarut Tripetchkul 4 , Nimaradee Boonapatcharoen 5 , Sirintornthep Towprayoon 1, 2, 3
Affiliation  

Abstract

Biochar has been recommended as a soil amendment to improve soil fertility and mitigate methane (CH4) emissions from rice cultivation. Its effects, however, vary depending on soil type, biochar characteristics, and application rate. This study was aimed to evaluate the potential of mangrove biochar on CH4 mitigation, soil properties, and the productivity of rice cultivated in a clay loam soil in Thailand. Biochar was used at a rate equivalent to 10 t ha−1 season−1, both with (biochar + fertilizer: BF) and without (biochar alone: BI) fertilizer, for two cultivation seasons. BI reduced CH4 flux at most stages of rice growth. Relative to control soil (no biochar, no fertilizer: CT), BI significantly decreased cumulative CH4 emissions by 21.1% in the first season and 24.9% in the second season. CH4 emissions from BF soil were also less than those from the use of fertilizer alone (FE). Rice grain yield in BI was 7.85% and 14.4% greater than in CT, and in BF by 1.47% and 3.72% greater than FE, in the first and second seasons, respectively. The decrease in CH4 emissions and increase in rice grain yield decreased CH4 emission intensity under biochar treatments. Soil pH, organic carbon, cation exchange capacity, and available nutrients in the soil increased with biochar addition. The soil organic carbon stock was significantly increased by 32.6% in BI and 27.5% in BF after the first season, and by 43.5% in BI and 39.6% in BF after the second season.



中文翻译:

生物炭对泰国水稻种植中甲烷排放,谷物产量和土壤的影响

摘要

生物炭已被推荐作为土壤改良剂,以改善土壤肥力并减轻稻谷种植中甲烷(CH 4)的排放。但是,其效果因土壤类型,生物炭特性和施用量而异。这项研究旨在评估红树林生物炭对缓解CH 4的潜力,土壤特性以及泰国在粘土壤土上种植的水稻的生产力。生物炭以等于10 t ha -1季节-1的速率使用两个生物季节,其中同时使用(生物炭+肥料:BF)和不使用(仅生物炭:BI)肥料。BI减少CH 4在水稻生长的大多数阶段通量。相对于控制土壤(无生物碳,无肥料:CT),BI在第一季显着减少了累积的CH 4排放,第二季减少了24.9%。高炉土壤中的CH 4排放量也少于单独使用化肥(FE)的排放量。在第一季和第二季,BI的稻谷产量分别比CT高7.85%和14.4%,而BF的稻谷产量比FE高1.47%和3.72%。CH 4排放量的减少和水稻籽粒产量的增加降低了CH 4生物炭处理下的排放强度。土壤pH,有机碳,阳离子交换能力和土壤中有效养分随着生物炭的添加而增加。第一季后,BI的土壤有机碳储量显着增加,高炉显着增加了27.5%,第二季后,BI和BF的土壤有机碳储量显着增加了43.5%和39.6%。

更新日期:2021-04-19
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