7LAIRD D,FLEMING P,WANG B,et al.Biochar impact on nutrient leaching from a Midwestern agricultural soil[J].Geoderma,2010,158(3):436-442.
8SINGH B P,HATTON B J,SINGH B,et al.Influence of biochars on nitrousoxide emission and nitrogen leaching from two contrasting soils[J].Journal of environmental quality,2010,39:1224-1235.
9BASSO A S,MIGUEZ F E,LAIRD D A,et al.Assessing potential of biochar for increasing water-holding capacity of sandy soils[J].Global change biology bioenergy,2013,5(2):132-143.
10ASAI H,SAMSON B K,STEPHAN H M,et al.Biochar amendment techniques for upland rice product in Northern Laos:Soil physical properties,leaf SPAD and grain yield[J].Field crops research,2009,111:81-84.