CAJ | 학술논문

为了解珍稀植物南方铁杉的生长过程及林下更新困难的原因。在南方铁杉森林群落调查的基础上，选取不同层次树木进行树干解析，分别研究林冠层、下木层南方铁杉生长过程。结果发现：（1）在成熟林中南方铁杉种群结构呈“倒金字塔”形，林冠层数量较多，林下幼苗幼树较少，自然更新困难；（2）南方铁杉生长较为缓慢，林冠层与下木层最大树高生长量分别仅为0．286、0．315 m/a，最大胸径生长量仅为0．453、0．286 cm/a，最大树积生长量仅为0．033、0．007 m3/a；（3）与林冠层相比，下木层南方铁杉除树高生长外，胸径、材积的最大连年生长年龄分别提前了39 a、42 a，数量成熟年龄分别提前了64 a和59 a，而且其树高、胸径与材积3者的速生生长时间都明显短缩。这些结果说明生长缓慢、林下受压“早衰”是南方铁杉林下更新困难的重要原因。研究结果为南方铁杉的就地保护和人工林经营提供理论参考。
위료해진희식물남방철삼적생장과정급림하경신곤난적원인。재남방철삼삼림군락조사적기출상，선취불동층차수목진행수간해석，분별연구림관층、하목층남방철삼생장과정。결과발현：（1）재성숙림중남방철삼충군결구정“도금자탑”형，림관층수량교다，림하유묘유수교소，자연경신곤난；（2）남방철삼생장교위완만，림관층여하목층최대수고생장량분별부위0．286、0．315 m/a，최대흉경생장량부위0．453、0．286 cm/a，최대수적생장량부위0．033、0．007 m3/a；（3）여림관층상비，하목층남방철삼제수고생장외，흉경、재적적최대련년생장년령분별제전료39 a、42 a，수량성숙년령분별제전료64 a화59 a，이차기수고、흉경여재적3자적속생생장시간도명현단축。저사결과설명생장완만、림하수압“조쇠”시남방철삼림하경신곤난적중요원인。연구결과위남방철삼적취지보호화인공림경영제공이론삼고。
In order to recognize the growth law of Tsuga chinensis var.tchekiangensis and thus to under-stand the mechanisms of its poor regeneration ,4 trees in mature T.chinensis var.tchekiangensis forest in Jiangxi Wuyishan National Nature Reserve were sampled for stem analysis .The results showed that (1) T.chinensis var. tchekiangensis population was declining in mature forests with fewer seedlings in the understory .(2) T.chinensis var.tchekiangensis was a slow growing species ,whose maximum height increments ( Hmax ) were only0.286 m/a for the canopy trees and 0.315 m/a for understory trees ,whose maximum DBH ( diameter at breast height) increments (Dmax) were 0.315 cm/a and 0.286 cm/a,maximum volumn increment (Vmax) were 0.033 m3/a and 0.007 m3/a respectively.(3) The ages of Dmaxand Vmax for trees in the understory (TU) were 39 and 42 years earlier than the ages of the trees in the canopy ( TC) ,and the mature ages of DBH and volume for TU were 64 and 59 years earlier than that in the TC respectively .These findings suggested that slow-growing and premature senility when shaded are the leading causes of difficult regeneration for T.chinensis var.tchekiangensis in mature forests ,which provides a theoretic basis for protecting and managing this promising species .