Effects of biochar produced from distiller grains on agronomic performances of sorghum(Sorghum bicolor L.)and greenhouse gas emissions from soil  

作　　者：Hongjun YANG Suyi ZHANG Jingyu HU Jianguo HUANG Zonghua AO Xiaoqin WANG Zhe LI Xuepin LIAO 

机构地区：[1]College of Resources and Environment,Southwest University,Chongqing 400715,China [2]National Engineering Research Center of Solid-State Brewing,Luzhou Laojiao Co.Ltd.,Luzhou 646000,China [3]College of Biomass Science and Engineering,Sichuan University,Chengdu 610065,China

出　　处：《Pedosphere》2024年第5期951-959,共9页土壤圈（英文版）

基　　金：the financial support by the National Key Research and Development Program of China(No.2018YFC1901100)。

摘　　要：Aromatic liquor breweries produce massive distiller grains containing a high percentage of rice husks that necessitate harmless treatment and resource utilization.These husk-rich distiller grains can be pyrolyzed in the Ni-based catalyst system at a relatively low temperature(480?C)into combustible gas,which is used in liquor distillation,and biochar(BDG)with high mineral nutrients and good surface properties.A 3-year field experiment(2018-2020)was established to understand the effects of BDG on sorghum agronomic performances and greenhouse gas emissions from the soil.The results showed that BDG had higher mineral nutrient(N,P,K,and S)contents,larger cation exchange capacity,and better surface structure than those prepared using the traditional method at 400 and 600℃.Compared with sole chemical fertilizer(CF),the combination of CF and BDG(CF+BDG)increased sorghum nutrient(N,P,and K)uptake,yield,fertilizer use efficiency,and economic benefit.Cumulative CO_(2) emission from the soil changed little between with and without BDG,indicating the microbial stability of BDG.The effective adsorption of NH_(3) or NH_(4)+by BDG upon N application may reduce N loss through NH_(3) and N_(2)O emissions and increase the efficiency of fertilizer N use.Cumulative CH_(4) emission ranged from 32.45 to 44.86 g ha-1,which could be overlooked as a greenhouse gas in the sorghum field.Moreover,CF+BDG significantly decreased NH3 and N_(2)O emissions for the production of each unit of sorghum grains and the CO_(2) emission from the land for the production of a certain amount of sorghum grains.Therefore,CF+BDG exhibited better agronomic and environmental performances in sorghum cultivation.

关 键 词：CO_(2)emission economic benefit environmental performance fertilizer use efficiency NH3 emission N_(2)O emission nutrient uptake yield 

分 类 号：S514[农业科学—作物学] X144[环境科学与工程—环境科学]