广西林业科学
廣西林業科學
엄서임업과학
GUANGXI FORESTRY SCIENCE
2012年
2期
146-149
,共4页
吴永富%覃贵才%程亮%黎怀玲%吴兵%兰俊
吳永富%覃貴纔%程亮%黎懷玲%吳兵%蘭俊
오영부%담귀재%정량%려부령%오병%란준
尾巨桉%无性系%高密度
尾巨桉%無性繫%高密度
미거안%무성계%고밀도
E. urophylla × E. grandis%clones%high-density
以当前桉树生产上常用的造林密度1666株/hm^2为试验的最低造林密度,与5种更高造林密度作为构成本试验的6种不同造林密度的高密度试验,分析尾巨桉(Europhylla×E.grandis)试验林2年生时的林分密度生长效应。结果表明,不同密度处理间的林分生长量有极显著差异,密度越大,其林分树高、胸径、单株材积越小,林分蓄积量则随密度的增加而增大,这与其它许多桉树密度试验结果相似。但林分生长效应提早,可能是林分密度过高缘故,最后结果有待继续观测研究。
以噹前桉樹生產上常用的造林密度1666株/hm^2為試驗的最低造林密度,與5種更高造林密度作為構成本試驗的6種不同造林密度的高密度試驗,分析尾巨桉(Europhylla×E.grandis)試驗林2年生時的林分密度生長效應。結果錶明,不同密度處理間的林分生長量有極顯著差異,密度越大,其林分樹高、胸徑、單株材積越小,林分蓄積量則隨密度的增加而增大,這與其它許多桉樹密度試驗結果相似。但林分生長效應提早,可能是林分密度過高緣故,最後結果有待繼續觀測研究。
이당전안수생산상상용적조림밀도1666주/hm^2위시험적최저조림밀도,여5충경고조림밀도작위구성본시험적6충불동조림밀도적고밀도시험,분석미거안(Europhylla×E.grandis)시험림2년생시적림분밀도생장효응。결과표명,불동밀도처리간적림분생장량유겁현저차이,밀도월대,기림분수고、흉경、단주재적월소,림분축적량칙수밀도적증가이증대,저여기타허다안수밀도시험결과상사。단림분생장효응제조,가능시림분밀도과고연고,최후결과유대계속관측연구。
High-density tests of E. urophylla × E. grandis clones with six different kinds of afforesta- tion densities including the lowest density of 1666 strains/hm^2 which is common to be used in current production of eucalypt and five kinds of higher densities were done to analyze the growth effect of stand density in the 2-year-old test forest. The results showed that there were very significant differences a- mong stand growths of different densities. The higher the density was, the lower stand height, DBH and individual volume were, while the stand accumulation increased with the increase of the density, which were similar to the results of another density tests of eucalypt. But the effect of stand growth was set out earlier probably because the density was too high, but the final issue remaind to be studied.