江西乐安县杉木实生与多代萌芽林比较研究

COMPARISON BETWEEN THE TWO KINDS OF CHINESE FIR STANDS ORIGINATED FROM SEEDLING PLANTING AND STUMP SPROUTING

江西乐安县杉木实生与多代萌芽林比较研究薛秀康，童书振，吴克选，陈长发，詹有生（中国林业科学研究院林业研究所北京１０００９１）（江西省林业科学研究所生态研究室南昌３３００３２）关键词杉木，起源，生长，产量，干形，冠形ＣＯＭＰＡＲＩＳＯＮＢＥＴＷＥＥＮＴ...

Located in lean County, Jiangxi Province, with same age, equal site conditions and silvicultural management, the two kinds of stands were compared in growth, yield and growing process of diameter at breast height (DBH),height and volume by means of whole plot examination and cut sample tree analysis. The results show that stands by sprouting grow faster in the first several years and slow down more quickly than stands by planting. At the age of 22, in poor sites, the difference in DBH between stands by sprouting and by planting is significant, whereas in relative good and good sites, no such difference was discovered; difference in height is significant regardless of site condition; annual volume increment of the two stands is still higher than average, meant that they have not reached quantitative maturity; yield of stands by sprouting varies from 237. 7 to 329. 5m3 a hectare compared with 253. 2-405.9m3/hm2 of stands by planting which is remarkably high in good sites. Some suggestions about silvicultural techniques, site selection and management goals concerning Chinese fir regeneration through sprouting were made according to above comparison.