Effect Of The Ratio Of Mushroom Compost On Seedlings Growth And Nutrient Status For Quercus Variabilis

Quercus variabilis, which belongs to deciduous tree of fagaceae and quercus L., is China’s national two precious tree species and also a good tree species to create a wind-proof forest, water conservation forest and fire protection forest. According to research statistics, China is an output power of edible mushroom, the output of edible fungus was 22 million tons in 2010, of which 60% was the mushroom residue. At present, the treatments of mushroom residue are mainly incineration, burial and other measures, which not only pollute the environment, but also waste resource. Peat is a kind of high-quality light substrate, is the main raw material of container seedling substrate. But peat as non-renewable resources, and large-scale exploitation and use will cause the destruction of the wetland environment. To explore the feasibility of mushroom compost as substitute material for peat, the experiments on the proportion of quercus variabilis container seedling substrate are done, six matrix formulations are determined from 0 to 100% of mushroom compost, the effects of different proportion of mushroom compost added into matrix on physicochemical properties, quercus variabilis seed germination rate, seedling height, ground diameter and biomass of container seedlings and the concentration of nitrogen, phosphorus and potassium. This paper can not only make lots of mushrooms residue turning waste into treasure, but also can reduce the use of non-renewable resource of peat and destruction of the environment. Thourgh studying the effects of physico chemical properties of six kinds of quercus variabilis container seedling substrate on quercus variabilis seedlings growth, the results showed:When the substitution rate of mushroom residue in less than 50%, the seedling emergence rate (> 80%), seedling height, ground diameter, ratio of height to diameter of quercus variabilis seedlings bred in six different matrices basically was no significant difference from those bred in peat matrix. Nevertheless, the ratio of height to diameter of quercus variabilis seedling bred in matrix containing 50%substitution rate of mushroom residue was higher than that of the control group 6.1. In nutritional indices of quercus variabilis seedlings, the content of nitrogen and phosphorus in root and the content of nitrogen, phosphorus and potassium in plant were not only higher than the control group, but also maximum value in six groups of matrix. In addition, the concentration of nitrogen and phosphorus in root and the concentration of nitrogen, phosphorus and potassium in plant were higher than those of the control group, and were also the largest in the 6 groups, which might contribute to afforestation. According to the physical and chemical properties of the substrate and the morphological and physiological indexes of seedlings in this paper, No.4 matrix formulation of Quercus variabilis was suitable for seedlings growth of mushroom residue and optimum substitution ratio of matrix formulation for six different matrix formula, namely, peat:Perlite:mushroom residue=25%:25%:50%. These research results provide theoretical basis and technical support for the container seedlings of Quercus variabilis seedlings.