立地管理措施对2代4年生杉木林生长的影响

在福建省南平峡阳国有林场开展5种不同立地管理措施对1片29a生第1代杉木人工林采伐后营造的4a生第2代杉木人工林生产力影响的研究。研究结果表明,5种处理的第2代杉木林地位指数与第1代相比均略有下降。BL3BM0(收获树干和树皮、加倍采伐剩余物)处理的4a生2代杉木林生长最好,地位指数仅比1代下降0．67;其次为BL0BM0(收获地上所有有机质)处理,地位指数比1代下降0．85;BL1BM0(清走树木的所有部分)处理杉木生长最差,地位指数下降1．67。炼山处理(BL2BM1)与保留相同数量采伐剩余物而不炼山的处理(BL2BM0)相比,杉木生长没有显著差异。

EFFECTS OF SITE MANAGEMENT MEASURES ON GROWTH OF 4-YEAR-OLD,SECOND-ROTATION CHINESE FIR PLANTATIONS

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 BL 3BM 0(stem+bark harvest,double slash)treatment with site index 0 67 lower than its first rotation,and the next best treatment was BL 0BM 0 (complete removal of organic matter residues) with site index 0 85 lower than its first rotation.The poorest tree growth was in the BL 1BM 0(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 BL 2BM 1 treatment(logging slash burning)with the BL 2BM 0 treatment(the same amount of slash but not burned).