Effect of organic materials and inorganic N on water stability of aggregates in cultivated black soil

By the experiment of laboratory simulation, effect of organic C and inorganic N addition on water stability of aggregates with different particle fraction from cultivated black soil were studied. The results showed that the ability of aggregates resisting shaking dispersion in water reduced with particle size increasing. The addition of maize root powder and glucose played an important role in protecting the water stability of aggregates which the particle size was bigger than 1mm, but couldn't protect the water stability of aggregates which the particle size was smaller than 1mm. Applied inorganic N only resulted in the decline of water stability of aggregates in cultivated black soil.