LAUSR

The slow decomposition rate of Pinus massoniana litter is an important problem that results in the nutrient imbalance of soil of P. massoniana forests. Accelerating the nutrient return rate to soil is considered to be an efficient measure to maintain the stability of soil productivity and sustainable management. The aim of this study was to observe the chemical quality change of litter and decomposition rate by altering the decomposition conditions and to assess the effect of different additives on the decomposition rate of P. massoniana litter in field. The regulation factors were microbial inoculants (fungus 1 or microorganisms 1 or microorganisms 2), surface⁃active agents( Tween 80 or OP⁃ 10), carbon and different forms of nitrogen nutrient solution(NaNO3 or urea or NH4 Cl) and organic fertilizer( chicken manure or oil cake) . The experiment was designed using the orthogonal test method of L9(3 ). The results indicated that the decomposition rate of P. massoniana litter was influenced significantly by organic fertilizer and microbial inoculants and was fastest under the