Effects of biochar application on soil physiochemical indicators at sloping farmland in black soil region
In the present study,an in-situ monitoring experiment was carried out at the sloping farmland to reveal the effects of biochar application during one year(from May to October)on soil bulk density,mass water content,pH,electrical conductivity,organic matter content and cation exchange capacity in black soil region,northeast China.Two experimental treatments were designed,including no biochar application(CK)and application of 30 t·hm-2 biochar(SW).The results showed that biochar application during one year decreased soil bulk density.Compared to the CK,the soil bulk density of ridge mound was decreased by 6.42％-11.21％from June to October.The de-crease range of soil bulk density was lowered with time.The biochar application decreased the soil mass water content from June to August,and the decrease range of ridge mound was smaller than that of ridge furrow.When the slope position was from top to bottom,the decrease range of soil mass water contents decreased gradually.However,the biochar application increased the soil mass water content from September to October,and the increase range of ridge mound was greater than that of ridge furrow.When the slope position was from top to bottom,the increase range of soil mass water content was elevated gradually.Furthermore,the biochar application increased soil pH,organic mat-ter content yet decreased soil electrical conductivity.Therefore,biochar application during one year could change the typical soil physical and chemical indicators,hence improve soil quality.
biocharsoil bulk densitysoil mass water contentsoil chemistry indicatorslope positionblack soil region
万方数据
维普
