Abstract:

The effects of five different site management measures on the productivity of 4-year-old,second rotation Chinese Fir(Cunninghamia lanceolata)plantations planted after harvesting a 29-year-old,first rotation Chinese Fir plantation in Xiayang State-owned Forest Farm,Nanping,Fujian Province,were studied.The results showed that the site index of the second rotation decreased slightly for five treatments compared to the first rotation.The best growth of the trees was observed in the BL₃BM₀(stem+bark harvest,double slash)treatment with site index 0.67 lower than its first rotation,and the next best treatment was BL₀BM₀ (complete removal of organic matter residues) with site index 0.85 lower than its first rotation.The poorest tree growth was in the BL₁BM₀(whole tree harvest)treatment with site index 1.67 lower than its first rotation.There was not a significant difference in tree growth comparing the BL₂BM₁ treatment(logging slash burning)with the BL 2BM 0 treatment(the same amount of slash but not burned).

Key words: Cunninghamia lanceolata, Second rotation, Site management, Growth, Site index