摘要
为了探究生物炭对土壤水分特征曲线的影响,采用室内试验的方法,测定不同生物炭含量的土壤水分参数,根据Van-Genuchten模型和Gardner模型对比研究不同生物炭含量的土壤水分特征曲线。研究发现:施加生物炭的土壤在不同的水吸力值下表现出不同的含水量变化规律,当吸力值较小时(<600cm),土壤的含水率在炭土比为2%处取得最大值,最多比无炭处理的含水率增大3.7%;当吸力值较大时(>600cm),土壤的含水率在炭土比为6%处取得最大值,最多比对照处理的含水率增大11.3%;但在整体上土壤的体积含水率都有所提高,说明施加生物炭后,在不同的水吸力下土壤的持水保水能力不同。试验结果表明:生物炭能在一定程度上改善供试土壤的持水能力。
In order to explore the effect of biochar on soil moisture characteristic curve,soil moisture parameters of different biochar content were determined by indoor test.According to Van-Genuchten model and Gardner model,soil moisture characteristic curves of different biochar content were compared.The study found that biochar soil in different water suction values showed regularity of different water content,when the suction value is small(less than 600cm),the soil moisture content reached the maximum value is 2%biochar mixed with soil,whose water suction value is 3.7%higher than that of no biochar group;when the water suction value is larger(more than 600cm),the soil moisture content reached the maximum value is 6%biochar,whose water suction value is 11.3%higher than that of control group;but the volume of soil water content on the whole rate are increased,indicating that the water retention capacity of the soil is greater in different water suction after exerting biochar.The experimental results show that the biological carbon can improve the water retention capacity of the tested soil to a certain extent.
作者
王竹
叶晓思
孙爱华
张涛
朱士江
WANG Zhu;YE Xiaosi;SUN Aihua;ZHANG Tao;ZHU Shijiang(Institute of Water Conservancy and Environment,Three Gorges University,Yichang 443002,China;Dongfengqu Irrigation Management Bureau,Yichang 443002,China;Institute of Agricultural Soil and Water Resources,Three Gorges University,Yichang 443002,China)
出处
《水利科学与寒区工程》
2018年第12期47-53,共7页
Hydro Science And Cold Zone Engineering
基金
农业部农业水资源高效利用重点实验室开放基金
