水土保持学报2017，Vol.31Issue(4)：112-117,6.DOI:10.13870/j.cnki.stbcxb.2017.04.019
生物质炭对旱作农田土壤持水特性的影响
Effect of Biochar on Soil Retention Ability in Dry Farmland
摘要
Abstract
In order to illustrate the effect of biochar on soil retention ability in dry farmland,this study measured the soil bulk density,soil porosity,soil moisture constants and the soil water retention curve of the soil with different biochar addition through setting located experiment in typical dry farmland of the Loess Plateau.The results showed that biochar adding reduced soil bulk density,and increased soil porosity.With the increasing of the biochar adding,the reduction range of soil bulk density and the increasing extent of soil porosity were both enhanced.The change of soil structure was the most obvious when the adding amount of biochar reached 50 t/hm2.Soil bulk density of 0-5 cm,5-10 cm and 10-30 cm soil layers decreased by 7.01％,9.91％ and 16.60 ％ compared with control group,respectively,and soil capillary porosity increased by 19.47％,21.02％ and 29.94％ compared with control group,respectively.The biochar adding increased soil saturated soil water content,soil field capacity and soil effective moisture content.With the increasing of the biochar adding,all the soil moisture constants showed rising trends,but the increasing extent decreased when the biochar amount reached 40 t/hm2.This study suggests that the addition of biochar improved the water retention ability of dry farmland,but the retention ability of soil tended to be stable when the adding amount of biochar reached 40 t/hm2.关键词
生物质炭/容重/孔隙度/土壤持水曲线/土壤水分常数Key words
biochar/soil bulk density/soil porosity/soil water retention curve/soil moisture constants分类
农业科技引用本文复制引用
刘小宁,蔡立群,黄益宗,董博,南学军,高志强..生物质炭对旱作农田土壤持水特性的影响[J].水土保持学报,2017,31(4):112-117,6.基金项目
国家自然科学基金项目(31571594,31160269) （31571594,31160269）
国家“十二五”循环农业科技工程项目(2012BAD14B03) （2012BAD14B03）
甘肃省自然科学基金项目(145RJZA106) （145RJZA106）
