【摘要】 立地质量的好坏是影响日本落叶松生长发育的主要因素。通过对不同立地条件下日本落叶松的生长调查,研究了日本落叶松生长与立地条件的关系,结果表明:18指数级的林分,胸径和树高年均生长量分别比14和16指数级高22%、14%和26%、16%;18指数级的林分总生物量比14和16指数级高54%和33.2%,树干生物量高12.3%和6.3%;18指数级的优势木比例比14和16指数级高21.8%和17.4%,弱势木的比例比14和16指数级低49.2%和45.0%。更多还原

【Abstract】 Site quality is good or bad is a major factor in the growth and development of Larix kaempferi;the greater the site index,the optimal the site conditions,the greater the tree growth.Survey shows that:DBH and the annual tree height growth of stands with index class of 18 is 22%,14% and 26%,16% higher than that of stands with index class of 14 &16,respectively;total biomass of stands with index class of 18 is 54% and 33.2% higher than that of stands with index class of 14 &16;stem biomass of stands with index class of 18 is 12.3% and 6.3% higher than that of stands with index class of 14 &16.Proportions of dominant trees with index class of 18 is 21.8% &17.4% higher than that of the stands with index class of 14 &16,respectively;the proportion of weak wood is 49.2%&45.0% lower than that of the stands with index class of 14 &16.更多还原