壳斗科三树种幼苗对不同光环境的形态响应与适应*

doi:10.11707/j.1001-7488.20080908

林业科学 ›› 2008, Vol. 44 ›› Issue (9): 41-47.doi: 10.11707/j.1001-7488.20080908

壳斗科三树种幼苗对不同光环境的形态响应与适应*

汤景明¹ 翟明普² 崔鸿侠¹

（1.湖北省林业科学研究院武汉430079； 2. 北京林业大学省部共建森林培育与保护教育部重点实验室北京100083）

收稿日期:2007-09-18 修回日期:1900-01-01 出版日期:2008-09-25 发布日期:2008-09-25

Morphological Responses and Adaptation of Seedlings of Three Tree Species of Fagaceae Family to Different Light Environments

Tang Jingming¹,Zhai Mingpu¹,Cui Hongxia¹

(1. Hubei Academy of Forestry Wuhan 430079; 2. Key Laboratory of Forestry Cultivation and Conservation of Education Ministry,Beijing Forestry University Beijing 100083)

Received:2007-09-18 Revised:1900-01-01 Online:2008-09-25 Published:2008-09-25

摘要/Abstract

摘要：

采用100%、56%和32% 3种光强进行人工控光处理，研究锥栗、水青冈和青冈1年生幼苗对不同光环境的形态响应与适应。结果表明：锥栗、水青冈和青冈1年生幼苗对不同光照环境产生不同程度的形态响应，其生长指标随光环境的变化程度表现出锥栗＞水青冈＞青冈。随着光照的减弱，3树种幼苗的苗高、地径、主根长均表现出下降的趋势。锥栗幼苗的现存叶片数、叶长、叶宽、单叶面积表现出随光照减弱逐渐减少，水青冈和青冈幼苗的现存叶片数随光照减弱呈下降趋势，而其叶长、叶宽、单叶面积则呈明显增加趋势。锥栗幼苗叶面积在全光环境最大，而水青冈和青冈幼苗叶面积均以56%光照强度最小。3树种幼苗比叶面积和叶面积比都随光照减弱呈增加趋势，锥栗和水青冈的这种差异达到显著性水平，而青冈则无明显差异。不同树种的幼苗在不同的光环境下生物量积累有明显差异。锥栗、水青冈生物量随光照的减弱明显降低，锥栗降低幅度比水青冈明显，而青冈没有明显差异。3树种幼苗在不同的光环境下各器官生物量分配格局没有明显变化。质量指数可以反映苗木各部分之间的协调和平衡，可为判断更新苗移植成活率提供依据。3树种幼苗均表现出在全光下质量指数最高，锥栗、水青冈幼苗在全光下质量指数明显大于遮荫处理，而青冈幼苗的质量指数在3种光环境下没有明显差异。

关键词: 锥栗, 水青冈, 青冈, 幼苗, 光照环境, 形态响应, 生态适应

Abstract:

The morphological responses and adaptation of oneyear old seedlings of Castanea henryi、Fagus Longiptiolata and Cycloblanopsis glauca to different light environments were studied in 100%, 56% and 32% of full sun light. The results showed that seedlings of C. henryi 、F. longiptiolataand C. glauca had different morphological responses to different light environments, and the change extent of growth indexes with light environment showed C. henryi＞ F. longiptiolata ＞ C. glauca. Seedling height, basal diameter and root length of the three tree species seedlings all had a decreasing trend with the decrement of light intensity. The leaf number, leaf length, leaf width and mean leaf area of C. henryi seedlings gradually increased with light intensity. The leaf number of F. longiptiolata and C. glauca seedlings had a decreasing trend while leaf length, leaf width and mean leaf area of F. longiptiolata and C. glauca seedlings all showed an obviously increasing trend with dimming light. Leaf area of C. henryi seedlings was the largest in full sunlight but that of F. longiptiolata and C. glauca seedlings were the smallest in 56% full sunlight intensity. Specific leaf area and leaf area ratio of the three tree species seedlings all had an increasing trend with reducing light intensity. The increment was significant in both C. henryi and F. longiptiolata, however not in C. glauca. There were obvious differences in biomass accumulation among the three species seedlings to different light conditions. Biomass of C. henryiand F. longiptiolata declined markedly with decreasing light intensity, and the change range of C. henryi was obviously higher than that of F. longiptiolata,while C. glauca had no obvious difference in biomass. The biomass allocation pattern over the organs of the three species seedlings had no obvious change in different light condition. Quality index can reflect the coordination and balance of each part of tree species seedling, and it can provide scientific basis for judging regeneration seedling transplantation survival rate. Quality index of the three species seedlings in the full sunlight were all the highest. C. henryiand F. longiptiolata in full sunlight had significantly higher quality index than that in shading treatment, while there was no significant difference of quality index in C. glauca seedlings over the different light intensities.

Key words: Castanea henryi, Fagus longiptiolata, Cycloblanopsis glauca, seedlings, light environment, morphological responses, ecological adaptation

汤景明翟明普崔鸿侠. 壳斗科三树种幼苗对不同光环境的形态响应与适应*[J]. 林业科学, 2008, 44(9): 41-47.

Tang Jingming;Zhai Mingpu;Cui Hongxia. Morphological Responses and Adaptation of Seedlings of Three Tree Species of Fagaceae Family to Different Light Environments[J]. Scientia Silvae Sinicae, 2008, 44(9): 41-47.

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壳斗科三树种幼苗对不同光环境的形态响应与适应*

Morphological Responses and Adaptation of Seedlings of Three Tree Species of Fagaceae Family to Different Light Environments

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