Composition and stability of the aggregates in black soil applied with different cattle manures

Application organic fertilization is a typical measure of circular agriculture,it can purify the environment and enhance the sustainable utilization of soil.Soil aggregates composition and stability was studied after applied different treated cattle manure and chemical fertilizer.The results showed that compared with applied chemical fertilizer, 5 mm large aggregates of mechanical stability was increased significantly,and the content of 0.25 mm aggregates of mechanical stability were all more than 74%,up to a maximum of 89.66% after applied different processing cattle manure.Moreover,applied different processing cattle manure made content of 0.25 mm water-stable aggregates all above 34%,up to a maximum of 42.05%.The application of different treated cattle manures improved the mean weight diameter and geometric mean diameter of soil aggregates,degree of aggregates dispersion of soil,reduced soil aggregates unstable aggregate index and fractal dimension,and soil bulk density,where in the application of decomposed cattle manure treatment had a significant effect.The result showed that the application of cattle manure was more advantageous to the composition and stability of soil aggregates than the fertilizer.Compared three different treated cattle manures,decomposed cow dung was not only beneficial to the formation of large aggregates,but also improved the structure and stability of soil aggregates.