Effects of Corn Straw Biochar on the Thermophysical Properties of Sierozem Soil
In order to study the effect of the application of corn straw biochar on the thermophysical properties of sierozem soil,the corn straw biochar with mass ratio of 0,1%,3%and 5%were added to 100 g dried sierozem soil,and the effects of different applied amounts of corn stalk biochar on the physicochemical and thermophysical properties of sierozem soil were analyzed.The results showed that corn straw biochar could effectively improve the pH,organic matter content,porosity,water holding performance and cation exchange amount of sierozem soil,reduce soil bulk density,and thus enhance the fertility of sierozem soil;the higher the biochar application amount,the better the physicochemical properties of sierozem soil.Corn straw biochar could affect the thermophysical properties of soil,the heat capacity,thermal conductivity and thermal diffu-sivity of soil will decrease with the increase of biochar application.The thermophysical properties of sierozem soil were closely related to soil wa-ter content.In this study,besides the thermal diffusivity of BC500 was not significant(R2＜0.95),and the others were significantly correlated with soil water content(R2≥0.95).The thermal capacity,thermal conductivity and thermal diffusivity of calcareous soil were significantly or extremely significantly negatively correlated with biochar application,significantly positively correlated with soil bulk density,and extremely sig-nificantly positively correlated with soil water content.
万方数据
维普
