Effects On Soil Physical Properties And Amorpha Fruticosa Growth To Add Humus From Aged Refuse And Refuse Compost

In this paper, aged refuse and garbage compost, acting as the research object, were used f or a planting test in the field. Aged refuse and garbage compost mixed with the nursery soil r espectively according to three kinds of proportions (0%,25%,50%and75%) for planting. We measured the soil physical and water properties of different proportions before and after cultivat ion separately, and analyzed the effect of growth indicators on plant. Our results showed that, u nder the condition of adding aged refuse humus soil, soil bulk density was decreased; soil poro sity and capillary porosity were increased; saturated moisture content and field moisture capacity were enhanced; wilting coefficient was reduced; and the content of soil sand and wet stable a ggregate (WSA) were improved. Among all the proportions, soil physical properties were obvio usly changed at75%, leading to the reduce of soil water retention. The plant growth condition was the best at25%. In addition, adding garbage compost could reduce soil bulk density and increase soil porosity and saturated moisture content and improve the content of large diameter water stable aggregate significantly. However, when the ratio exceed50%, field moisture capacit y would markly decrease and the ability of soil water retention was weak, which leaded to inh ibition of seedling growth and was prone to burn seedlings situation. Therefore, we suggested t hat adding25%to50%aged refuse was more appropriate in the course of using green matrix, but the percentage should be controlled less than50%in applications of garbage compost.