长白落叶松工业用材林初植密度选择及收获研究

黑龙江省东南部地区,在未经人工干扰、发育良好、保持初植密度不变的长白落叶松人工林中典型取样,应用静态标准地树干解析作动态分析,应用林学理论、数学理论和计算机工具分析扩展初植密度。以11.3地位指数分析,15～35a长白落叶松人工林竞争敏感密度(竞争阈)平均1800株/hm2;15～10a密度竞争减弱,竞争敏感密度和有效密度上浮在1900和2000株/hm2为理论依据设计初植密度;10a以下竞争不明显。为培育工业用材,强调收获量和降低成本,适合采用1700～2000/hm2为理论依据设计初植密度。以此密度设计造林能够产生空白生态位,用于生物多样性的发展,为搞复合经营创造条件。

INITIAL DENSITY SELECTION AND HARVEST OF TIMBER PLANTATION OF LARIX OLGENSIS

In this paper the initial density was derived by sampling in larix olgensis plantations,un disturbed,well developed in thoutheast area of Heilongjiang,dynamically analyzing stem analysis and using computers.By 11.3 site index analyzing,the compesitive sensitive density averages 1800 plants per hm2 at ages of 15～35 per hm2.The competition is weak at 15～10 a,in which the average growth is 1900 plnats per hm2 and 2000 plants per hm2?Competition is'nt clear below 10 years.In order to raise harvest quantity and reduce cost the optimum initial density obtained is between 1700 and 2000 plants per hm2?Afforestation at that design density can produce free ecotype place.It is helpful for development of diversity and creating favorable condition for complex management.