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木荷幼苗在林窗不同生境中的形态响应与生物量分配
引用本文:汤景明,翟明普.木荷幼苗在林窗不同生境中的形态响应与生物量分配[J].华中农业大学学报,2006,25(5):559-563.
作者姓名:汤景明  翟明普
作者单位:湖北省林业科学研究院,武汉,430079
基金项目:国家科技攻关计划;湖北省林业科研项目
摘    要:对从林窗边缘到林窗中央环境梯度上3种不同生境的木荷幼苗的主要形态因子和生物量进行了测定,结果表明,3种生境下木荷幼苗的形态数量指标表现出极显著的差异,从林窗边缘到林窗中央,随着光照等环境条件的改善,其生长量和生物量逐渐增加。生物量的分配格局基本相似,但叶和主茎生物量表现出显著的差异,林窗边缘处,木荷幼苗将生物量相对多地分配到地上叶构件上,林窗中央处,则相对多地分配到地上主茎上。研究显示,木荷幼苗具有喜光能耐阴的特性。运用非线性幂函数拟合了不同生境木荷幼苗生物量模型,回归模型较好地反映了生物量随苗高、地径的变化趋势,可作为环境条件类似的木荷幼苗生物量预测的依据。

关 键 词:木荷  幼苗  形态响应  生物量分配  模型
文章编号:1000-2421(2006)05-0559-05
收稿时间:06 10 2006 12:00AM
修稿时间:2006-06-10

Morphological Response and Biomass Allocation of Schima superba Seedlings at Different Habitats in Gap
TANG Jing-ming,ZHAI Ming-pu.Morphological Response and Biomass Allocation of Schima superba Seedlings at Different Habitats in Gap[J].Journal of Huazhong Agricultural University,2006,25(5):559-563.
Authors:TANG Jing-ming  ZHAI Ming-pu
Institution:1.Key Laboratory of Forest Cultivation and Conservation of Education Ministry, Beijing Forestry University, Beijing 100083,China; 2. Hubei Academy of Forestry ,Wuhan 430079,China
Abstract:Morphological factors and biomass of Schima superbaseedlings in three different habitats of environment gradients from gap's edge to gap's centre were measured and analyzed.The results showed that the difference of their morphologicalcharacter were significant at 1% level.The growth and biomass increased with environmental improvement such as intensity of illumination.The biomass allocation pattern were similar but the biomass of leaf and stem were significant at 5% level.It was found that Schima superbais a kind of helioskiophyte.At the gap's edge,seedlings were existed by their relatively high investment in leaf growth and seedlings at the gap's centre were grown by their relatively high investment in stem growth.According to the data of the practical measurement,18 regressive models between ramet height,basal diameter and biomass were established using geometric regression.These models reflected the changing trend of biomass along with ramet height and basal diameter,which could be applied to biomass prediction of Schima superbaseedlings in similar environmental conditions.
Keywords:Schima superba Gardn  et Champ    seedlings  morphological response  biomass allocation  regressive model
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