CAJ | 학술논문

华北落叶松(larix principis-rupprechtii Mayr.)是燕山山地的主要树种,生态和经济效益显著.以河北木兰林管局境内13 a生华北落叶松人工幼林为研究对象,用样方调查的方法对立地条件相同密度分别为1 800、2 400和3 000株/hm2的3种林分生物量进行研究,结果表明:林分总生物量随密度的增大而增大,低、中、高3种密度林分总生物量分别为21 180.6、26 724.6和31 352.4 kg/hm2;乔木层生物量最大,占总生物量的98.9%,草本层次之,占0.7%,灌木层最少,仅占0.4%;林木平均木生物量随密度的增大略微减少,密度由低到高其平均木生物量依次为11 537.5、11 077.3和10 357.8 g/株;各密度林分乔木层各器官生物量均存在W干>W枝>W根>W叶>W皮的分布规律;3种密度的林分生物量结构特征基本相同,3 000株/hm2的林分结构合理,更能达到丰产的目的.
화북락협송(larix principis-rupprechtii Mayr.)시연산산지적주요수충,생태화경제효익현저.이하북목란림관국경내13 a생화북락협송인공유림위연구대상,용양방조사적방법대입지조건상동밀도분별위1 800、2 400화3 000주/hm2적3충림분생물량진행연구,결과표명:림분총생물량수밀도적증대이증대,저、중、고3충밀도림분총생물량분별위21 180.6、26 724.6화31 352.4 kg/hm2;교목층생물량최대,점총생물량적98.9%,초본층차지,점0.7%,관목층최소,부점0.4%;림목평균목생물량수밀도적증대략미감소,밀도유저도고기평균목생물량의차위11 537.5、11 077.3화10 357.8 g/주;각밀도림분교목층각기관생물량균존재W간>W지>W근>W협>W피적분포규률;3충밀도적림분생물량결구특정기본상동,3 000주/hm2적림분결구합리,경능체도봉산적목적.
Larix principis-rupprechtii Mayr. is the main species in the Yanshan Mountain area,and it has prominent effect in ecology and economy. The paper used the 13 year-old young plantations of Prince Rupprecht' s Larch in the area of Mulan Forestry Bureau of Hebei. The method of sampling was used for the stand biomass research among the three densities as 1 800,2 400,3 000 trees/hm2 ,but in the same conditions.The result indicated: The total stand biomass increased with the increasing density.The stand total biomass with the three densities of low, middle,high,are 21 180.6,26 724.6,31 352.4 kg/hm2 .The tree layer biomass is the largest, 98.9% on the total biomass, then Herb layer, just 0.7%, while the shrub layer is the lowest, only 0.4%. The average wood biomass of stands decreased slightly with the increasing density. The average wood biomass of stands are 11 537.5,11 077.3 and 10 357.8 g/tree in turn with the density from low to high. The organ biomasses of tree layer with every densities, has the distributing rule of Wtrunk > Wbranch > Wroot > Wieave > Wskin.The stands biomass of the three densities has the same structure character basically. The stands structure of 3 000 trees/hm2 is reasonable, and it also can meet the purpose of fertility.