Application Research Of Bleached Soils On Compound Fertilizer Granulation And Nutrient Releasing

The category of agglomerant of compound fertilizer cost expensive in generally, some agglomerants are residued in soil easy, it' is caused the environmental pollution,etc. so it's important to research the agglomerants of cheap and environmental protection. This paper used the bleached soils which is adsorptive minerals for agglomerant of compound fertilizer, and use the bentonite and zeolite to contrast, it's from the three aspect of fellow: The influence of the granulation characteristic by bleached soils,bentonite and zeolite, the nutrient releasing in soil and water of bleached soils,bentonite and zeolite, and the influence to the biomass in lawn.The research results as fellow:1.The granulation rate of the binder by bleached soils is higher than zeolite and bentonite ,its indicate that the bleached soils can replace the tradition adsorptive minerals for agglomerant of compound fertilizer.2.The aspect of granulation rate in organic compound fertilizer is higher than inorganic compound fertilizer by bleached soils.3.In the treatment of 60 and 100 mesh by bleached soils, the granulation rate of 100 mesh treatment is a bit higher that 60 mesh.In the level of addition dosage in granulation rate of organic compound fertilizer, the most optimization is 9%, however, in granulation rate of inorganic compound fertilizer by agglomerant of bleached soils, the regularity is that the granulation rate is improved by the improve level of addition dosage, the most optimization is 15%.4.The aspect of nutrient releasing, the agglomerant of bleached soils is more good for the P contrast the zeolite and bentonite, it's also have some influence to the realease of K. However, the realease of N, the three agglomerant have no significant. 5.This paper chose three equations to fit the character of dynamics about the supply to N in bleached soils granular fertilizer at leaching liquor. The first-order dynamics equations and Elovich equation are fitting good, the correlation coefficient is high significant. 6. The contrast of biomass in lawn, however in the time of fourth sampling, the biomass is higher by bleached soils granular fertilizer than others in lawn, and the biomass is lowest by CK treatment, the different granular fertilizer made by bleached soils,the biomass of 100 mesh treatment is a bit higher that 60 mesh, in 9% addition dosage isbetter than others in significantly.