生物炭对砂土水力特征参数及持水特性影响试验研究  

Influence of Biochar on Sandy Soil Hydraulic Characteristic Parameters and Moisture Holding Properties

作　　者：田丹[1] 屈忠义[1] 李波[1] 吕一甲[1] 

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,呼和浩特010018

出　　处：《灌溉排水学报》2013年第3期135-137,共3页Journal of Irrigation and Drainage

基　　金：国家自然科学基金项目(41161038);留学回国人员科研启动基金项目([2012]940号)

摘　　要：为了揭示生物炭节水、保肥的性能机理,研究了生物炭材料对砂土的水力特征参数及持水特性的影响。结果表明,生物炭能够显著改变砂土的土壤结构,随着生物炭用量的增加,砂土密度减小、总孔隙度增大;不同生物炭处理下饱和导水率均比对照小,持水能力均比对照组大;相同的水势情况下,土壤持水能力随着生物炭质量分数的增加而提高,且不同种类生物炭对土壤水力学参数的影响程度不一致。The effects of biochar on sandy soil hydraulic characteristic parameters and moisture holding properties were studied to reveal the water-saving and fertility maintenance mechanisms of biochar. The results showed that the application of bioehar could change the sandy soil structure and increase soil density with the increase of adding amount of hioehar. Saturated hydraulic conductivity were smaller than the control group and saturated water capacity was larger than the control group in different biochar treat- ments. In the same water potential cases, water holding capacity improved along with the increase of bio- char content, and the influences of different kinds of biochar on soil hydraulics parameters were inconsistent.

关 键 词：生物炭 砂土 总孔隙度 饱和导水率 水分特征曲线 

分 类 号：S152.7[农业科学—土壤学]