Effects of Clear-cutting and Slash Burning on Carbon Stock of Chinese Fir Plantation in the Rainy Area of Southwest China

Carbon reserve of artificial forest ecosystem is one of the major carbon stocks of terrestrial ecological system. Negative environmental effects caused by clear-cutting and slash burning deserve careful thought. In this paper,28-years-old Chinese fir plantation in the rainy area of Southwest China was taken as the research objective,and the main aim was to clarify the effects of clear-cutting and slash burning on carbon stock of Chinese fir plantation. The results showed that (1) C transfer amount of wood caused by logging was 85.9 (±7.6) t·hm^-2,(2) C loss of logging residues,understorey and litter caused by slash burning were 8.8 (±0.3) t·hm^-2,0.19 (±0.02) t·hm^-2 and 2.80 (±0.08) t·hm^-2,respectively. (3) Slash burning could significantly decrease the content of soil organic carbon in 0~60 cm layer,the C loss was 39.5 (±1) t·hm^-2. The total release of CO₂ caused by burning of the understorey plants,litter and soil organic matter,was 188.1 t·hm^-2. In the global climate change,negative environmental effects caused by clear-cutting and slash burning of plantation nust not be ignored.