Study on the Influence of Different Straw-returning Manners on Soil Structure and Characters of Soil Water Evaporation
Based on the analysis of fractal dimension of soil aggregates and soil pore in low suction range,the influence of the wheat straw,comminuted,aminated or mingled with inorganic soil amendment,on the soil tructure,soil bulk density,soil porosity and characters of soil water evaporation,after mixed with the soil was studied.Compared with control,the straw comminuted and aminated added into soil can observably improve the soil aggregate structure,reduce the soil density and increase the soil porosity;wheat straw added into soil can make fractal dimension of soil pore smaller than the control,and can make the uniformity and connectivity of soil pore worse,then the evaporation rate was increased.Inorganic soil amendment can amend the soil pore distribution and restrain the soil water evaporation.So it can benefit more for the usage of rainwater resource if the comminuted and aminated straw was used with inorganic soil amendment.
comminuted strawsoil aggregatefractal dimensionsoil water evaporation
国家科技期刊平台
NSTL
万方数据
维普
