Preparation of high water-retaining biochar and its mechanism of alleviating drought stress in the soil and plant system
作者机构：Hubei Key Laboratory of Soil Environment and Pollution RemediationKey Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtse River)Ministry of Agriculture and Rural AffairsCollege of Resources and EnvironmentHuazhong Agricultural UniversityNo.1 Lion Hill StreetHongshan DistrictWuhan 430070People’s Republic of China
出 版 物：《Biochar》 (生物炭（英文）)
年 卷 期：2021年第3卷第4期
页 面：579-590页
核心收录：
学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学]
基 金：This study was supported by the National Key Research and Development Program of China(2018YFD0800703) Wuhan Science and Technology Project(2020020601012264) the Fundamental Research Funds for the Central Universities(2662018PY078)
主 题：Biochar Pyrolysis temperature Reaction atmosphere Water retention performance Drought stress
摘 要：To explore the effect of biochar on alleviating plant drought stress after being applied to soil,we prepared biochar using rice straw as raw material according to different pyrolysis temperatures(400,600 and 800°C)and reaction atmosphere(CO_(2)and N_(2)).The effect of different pyrolysis conditions on the water retention performance of biochar was *** early high water-retaining biochar materials were selected and wheat seeds were selected for the verification experiment of returning to the field in *** with high porosity(specific surface area and total pore volume)and more surface hydrophilic functional groups(mainly-OH and-COOH)can indeed improve soil water retention *** is mainly reflected in the increase in the dry weight and fresh weight of wheat and the soil moisture content in the treatment group with the addition of biochar water retention *** them,the growth rates of fresh weight and dry weight of wheat in the C800 treatment group were 11.51%and 10.64%,and the soil moisture content increased by 1.89%.It is worth noting that the application of biochar cannot completely alleviate the impact of drought stress on plants,but it can reduce the amount of water irrigation to a certain *** the quality of biochar,the biochar material(C800)prepared under the pyrolysis temperature of 800°C and the reaction atmosphere of CO_(2)has high water retention performance.
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