NOVELTY - Matrix comprises 90-120 pts. wt. litters, 7-10 pts. wt. peanut bran, 7-10 pts. wt. Paulownia (tung) bran, 90-120 pts. wt. biogas liquid fertilizer, 12-15 pts. wt. slaked lime, 250-500 pts. wt. yellow subsoil and water (suitable quantity).    USE - The matrix is useful for seedling cultivation of Castanopsis hystrix (claimed).    ADVANTAGE - The matrix is cost-effective as raw materials used in the matrix have abundant resources or wider source of availability. The preparation method is simple and convenient to operate. The matrix is comprehensive in nutrition, gets well absorbed by the C.hystrix seedlings and provides long-term manure effect. The seedling cultivated using the matrix has high survival and strong growth rates.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method for preparing the above-mentioned seedling cultivation matrix, which involves (a) taking 7-10 pts. wt. peanut bran having 3% or less moisture content and 7-10 pts. wt. Paulownia bran having 5% or less moisture content, placing the peanut bran and Paulownia bran into different plastic buckets or water pools, adding 27-30 pts. wt. water, soaking the added bran for 40-60 days and stirring soaked bran for every 10 days, (b) adding and mixing pig manure, poultry manure, slaked lime and rice straw to obtain mixture, filtering the domestic sewage by 0.5 cm or less mesh size filter, adding and mixing the mixture with domestic sewage in marsh gas tank, stirring mixture, sealing the tank, performing anaerobic fermentation for 4 months or more, taking out marsh gas pool from upper layer solution, stirring and mixing solution uniformly to obtain biogas slurry manure, (c) pre-processing the georgette bush dried leaves as litter in open water tank, uniformly mixing preprocessed dried leaves and slaked lime and performing fermentation for 2 days, (d) adding obtained fermented product, peanut bran solution and rotting solution obtained in the step (b), further adding 90-120 pts. wt. biogas slurry manure, stirring mixture, pressing the mixture by wood board and/or brick, soaking the mixture for 3-5 months and drying waterproof material, and (e) mixing 250-500 pts. wt. yellow soil comprising sand content of 10-20% and pH of 5-6 to obtained litter solution, uniformly stirring and mixing components to obtain the matrix.