Abstract:

The effects of five different site management treatments on productivity of 6-year-old,second rotation Chinese Fir(Cunninghamia lanceolata)plantations planted after harvesting a 29-year-old,first rotation Chinese Fir plantation in Xiayang State Forest Farm,Nanping,Fujian Province,were studied.The results showed that the Chinese Fir stand grew the best on the double slash treatment(BL₃),followed by the whole tree harvest treatment(BL₁)and slash burning treatment(SB),and the poorest on the no slash burning treatment(BL₂)and the no slash treatment(BL₀).The site index of the second rotation Chinese Fir plantations in the BL₃ and BL₀ treatments increased by 0.56 and 0.27,respectively,compared with the first rotation,and decreased in the rest of the 3 treatments.Compared with the first rotation,site index of the second rotation treated with BL₁,SB and BL₂ treatments decreased by 0.39,0.45 and 0.63,respectively.Differences between the treatments were not statistically significant.

Key words: Chinese Fir, second rotation, site management, growth, site index