不同营林模式下毛竹枝叶的生物量分配:异速生长分析

发布时间：2018-06-25 08:04

本文选题：异速生长 + 枝叶分配　；参考：《植物生态学报》2013年09期

【摘要】：植物枝、叶的异速生长关系受个体发育的限制,同时还受到环境因素的影响。该研究应用异速生长分析方法探讨毛竹(Phyllostachys heterocycla‘Pubescens’)枝、叶关系及其生物量分配策略对不同营林模式(钩梢和施肥)的响应。结果表明:与不钩梢相比,钩梢(相当于60%的修枝水平)后毛竹枝叶生物量均有显著的下降(枝40.23%、叶41.01%);施肥显著增加了钩梢和不钩梢毛竹枝、叶生物量(不钩梢枝20.67%、叶46.53%;钩梢枝19.71%、叶13.95%)。施肥显著改变了毛竹枝、叶异速生长的标准主轴(standardized major axis,SMA)斜率(施肥0.75 vs不施肥0.82;p0.05),表现为与不施肥相比,叶片的光合产物在施肥处理上相对更多地转移到枝上。钩梢后,毛竹枝、叶异速生长的SMA斜率显著增加(钩梢1.09 1.10 vs不钩梢0.74 0.83;p0.000 1),表现出钩梢引起更多的资源向叶片分配,且在不施肥处理下,这种效应更为强烈。光照因素导致了毛竹冠层枝、叶异速生长关系的差异,并与施肥之间存在显著的交互效应。钩梢作为直接影响因素对毛竹枝、叶异速生长关系具有强烈的影响(p0.001),导致枝、叶异速生长关系斜率变异接近50%,而施肥或光照条件10%,表明枝、叶关系对不同环境或干扰因素的响应存在差异,且间接因素(如施肥)的影响更多受到自身生长发育的限制。
[Abstract]:The isokinetic growth of plant branches and leaves is restricted by ontogeny as well as by environmental factors. The response of branches, leaf relationships and biomass allocation strategies of Phyllostachys heterocycla pubescens'(Phyllostachys heterocycla pubescens') to different forest models (hook and fertilization) was studied by using the method of allometric growth analysis. The results showed that the biomass of bamboo branches and leaves decreased significantly (40.23%, 41.01%) after hook shoot (equivalent to 60% pruning level), and fertilization significantly increased the hook shoot and unhooked bamboo branch. The biomass of leaves was 20.67%, 46.53%, and 19.71%, 13.95%, respectively. Fertilization significantly changed the slope (0.75 vs 0.82p0.05) of (standardized major axis-SMA, the standard spindle of leaf growth, which showed that compared with no fertilization, the photosynthetic products of leaves were transferred to the branches relatively more in fertilization treatment. After hook shoot, the slope of SMA increased significantly (1.09 ~ 1.10 vs 0.74 ~ 0.83p ~ (0.000 1), which showed that the hook tip caused more resources to be allocated to the leaves, and the effect was more intense under the condition of no fertilizer application. The light factor resulted in the difference of the growth relationship between shoot and leaf of bamboo canopy, and there was a significant interaction between the growth rate and fertilization. As a direct influence factor, hook shoot had a strong influence on the relationship between the growth of bamboo branches and leaves (p0.001), which led to the slope variation of the relationship between branches and leaves reaching 50%, while fertilization or illumination was 10%, indicating that the branches had a different growth rate. The response of leaf relationship to different environment or interference factors is different, and the influence of indirect factors (such as fertilization) is more limited by their own growth and development.
【作者单位】：丽水学院;遂昌县林业局;安吉县林业局;
【基金】：毛竹笋竹林测土推荐施肥技术推广与示范和中央财政林业科技推广项目(2009TS001)
【分类号】：S795.7

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