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| 辽东栎苗木早期生长与光的关系 | |
| 引用本文： | 韩海荣,贺顺钦,张学培,王英杰,张宏达.辽东栎苗木早期生长与光的关系[J].北京林业大学学报,2000,22(4):97-100. |
| 作者姓名： | 韩海荣 贺顺钦 张学培 王英杰 张宏达 |
| 作者单位： | 1. 北京林业大学资源与环境学院,100083,北京 2. 中国林业科学院,100091,北京 3. 北京林业大学生态工程学院,100083,北京 4. 山西太岳山森林经营局,046505,太岳 |
| 基金项目： | 北京林业大学校科研和教改项目 |
| 摘 要： | 为探讨辽东栎苗木早期生长与光的关系 ,在苗圃设置了 4种人工控制下的光照强度 (1 0 0 % ,5 0 % ,30 % ,4% ) .对苗木在不同的光照条件下的出苗率、苗高生长、苗木地径、净光合效率等进行了测定 .结果表明 ,全重种子的保存率高达 30 %～ 6 0 % ,而 1 /3,1 /2重处理的保存率为 1 %～ 43.3% ,低于全重种子 .光强对根的生长有很大的影响 .苗木的各项指标在全重 (对照 )区 ,随着光照强度的减弱而减少 ,而且在同一光照区 ,全重 (对照 )大于 1 /2 ,1 /3重处理的苗木 .辽东栎苗木在光照强度 5 0 %的条件下生长较好 ,相对光照强度小于 30 %时 ,其生长状况显著降低 .辽东栎属于阳性树种 ,从本实验的结果来看 ,虫兽害对种子的危害不是影响天然更新的主要因子 ,林内光照不足 ,对辽东栎幼苗的生长起主要限制作用 |
| 关 键 词： | 辽东栎 光照强度 出苗率 苗木生长 |
The effect of light intensity on the growth and development of Quercus liaotungensis seedlings |
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| Han hairong,He Shunqin,Zhang Xuepei,Wang Yingjie,Zhang Hongda.The effect of light intensity on the growth and development of Quercus liaotungensis seedlings[J].Journal of Beijing Forestry University,2000,22(4):97-100. | |
| Authors: | Han hairong He Shunqin Zhang Xuepei Wang Yingjie Zhang Hongda |
| Abstract: | In order to inquire into the relationship between the early growth of Quercus liaotungensis and light, by using green wire entanglement shading we set up four illumination intensity(e.g.100%, 50%, 30%, and 4% of full light)to study the rate of emergence of seedlings, the height growth of nursery stock, the diameter near the earth's surface of nursery stock, net photosynthesis, transpiration, the obstruction of stoma and the utilization ratio of moisture under different illumination intensity. The results show that the young plant of Quercus liaotungensis is not suited to grow under full light, but it is suited to grow under 50% of full light. Under 50% of full light, the rate of emergence of seedlings is the highest. In addition, under this condition, the fastest growth on height and the diameter near the earth's surface of Quercus liaotungensis are achieved. At the same times net photosynthesis, transpiration, and the utilization ratio of moisture are all effective. Quercus liaotungensis can grow under 30% and 4% of full light. So a conclusion is drawn that the proper shading is required during the early growth of the young plant of Quercus liaotungensis although Quercus liaotungensis is light\|demeter |
| Keywords: | Quercus liaotungensis light intensity rate of emergence of seedlings growth of seedlings |
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