江西4刨花楠种源苗木叶片表型性状与生物量分配的比较

Comparison of leaf phenotypic traits and biomass allocation of different provenances of Machilus pauhoi

采用实验地调查与统计分析方法对江西4种源刨花楠(Machilus pauhoi)苗木叶片长(LL)、宽(LW)、厚(LT)、重(LH)、叶面积(LA)及比叶面积(SLA)等表型性状与生物量分配进行比较,4种源的种子分别来自江西崇义(CY)、遂川(SC)、泰和(TH)和永新(YX)4县。结果表明:(1)刨花楠不同种源间苗木的LL、LW、LT、LH、LA与SLA存在显著差异(P<0.05),其中,LL大小为TH>SC>YX>CY,LW为CY>TH>SC>YX,LT为SC>YX>TH>CY,LH为TH>CY>SC>YX,LA为TH>CY>SC>YX,SLA为YX>SC>CY>TH。(2)叶片的LL、LW、LH与LA四者间呈极显著正相关(P<0.01);而SLA与LL、LW、LH、LA四者均呈极显著的负相关(P<0.01),与LT虽呈负相关,但相关不显著(P>0.05)。(3)不同种源间苗木生物量存在显著差异(P<0.05),其大小为SC>TH>CY>YX;4种源苗木各构件的生物量占总生物量比都为叶>茎>根。(4)不同种源间苗木各相同构件间的相对生物量结构虽存在差异,但相差不显著(P>0.05),其中叶相对生物量大小为TH>SC>YX>CY,茎相对生物量为CY>SC>TH>YX,根相对生物量为YX>CY>TH>SC。(5)不同种源间苗木的根冠比大小为YX>TH>CY>SC,但相差不显著(P>0.05)。

In order to understand the variations of leaf phenotypic traits and biomass allocation in different provenances of Machilus pauhoL leaf phenotypic traits, including leaf length （LL） and leaf width （LW）, leaf thick （LT）, leaf heavy （LH）, leaf area （LA）, specific leaf area （SLA）, and biomass allocation of 4 provenances of Machilus pauhoi were measured and analyzed by using the experimental survey and statistics analysis method. The seeds of Machilus pauhoi from Jiangxi Chongyi （CY）, Suichuan （SC）, Taihe（TH） and Yongxin （YX）. The comparative study results of leaf phenotypic traits and biomass allocation were as follows. （1）The LL, LW, LT, LH, LA and SLA of Machilus pauhoi were significantly different between provenances （P〈0.05）, and the rank for LL- TH〉SC〉YX〉CY; LW： CY〉TH〉SC〉YX; LT： SC〉YX〉TH〉CY; LH： TH〉CY〉SC〉YX; LA： TH〉CY〉SC〉YX; SLA： YX〉SC〉CY〉TH. （2） Pearson correlation analysis showed that high significant positive correlation occurred within the LL, LW, LH and LA （P〈0.01）, while the SLA and LL, LW, LH, LA showed a very significant negative correlation （P〈0.01）; the SLA and LT were negatively related, but not significantly correlated （P〉0.05）. （3） The biomass was significantly different between provenances （P〈0.05）, and the size of each component biomass of different provenances of Machilus pauhoi was leaf〉stem〉root. （4） The structure of the relative biomass was different between provenances, but the difference was not significant （P〉0.05）; the size order of the leaf relative biomass was TH〉SC〉YX〉CY; stem relative biomass was CY〉SC〉TH〉YX; root relative biomass was YX〉CY〉TH〉SC. （5） The root shoot ratio in size order was YX〉TH〉CY〉SC, but the difference was not significant （P〉0.05）.