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| 水分条件对干热河谷锥连栎种子萌发及幼苗早期生长的影响 | |
| 引用本文： | 刘方炎,张志翔,王小庆,张鑫,李昆,孙永玉.水分条件对干热河谷锥连栎种子萌发及幼苗早期生长的影响[J].热带亚热带植物学报,2011,19(2):105-112. |
| 作者姓名： | 刘方炎 张志翔 王小庆 张鑫 李昆 孙永玉 |
| 作者单位： | 1. 北京林业大学林木育种国家工程实验室,林木花卉遗传育种教育部重点实验室,国家林业局自然保护区研究与评价中心,北京,100083;中国林业科学研究院资源昆虫研究所,国家林业局元谋荒漠生态系统定位观测站,昆明,650224 2. 北京林业大学林木育种国家工程实验室,林木花卉遗传育种教育部重点实验室,国家林业局自然保护区研究与评价中心,北京,100083 3. 中国林业科学研究院资源昆虫研究所,国家林业局元谋荒漠生态系统定位观测站,昆明,650224 |
| 基金项目： | 国家科技支撑计划项目(2006BAD03A03和2010BAD04) |
| 摘 要： | 对锥连栎(Quercus franchetii Skan)在4种施水量下的种子萌发、幼苗早期生长形态及生物量分配的响应特征进行了研究。结果表明，施水量对锥连栎的种子萌发过程具有显著影响。随着施水量增加，其种子萌发率、萌发指数以及萌发时间和萌发持续时间均呈明显的上升趋势，而萌发时滞和萌发速率系数呈下降趋势。锥连栎幼苗早期生长对施水量的适应幅度较大，每次施水4～12 mm时，幼苗均能存活，但生长状况存在明显差异，随着施水量的减少，幼苗生长和生物量的积累速度均出现显著减缓。同时，施水量对锥连栎幼苗生物量分配具有显著影响，随着施水量增加，幼苗根冠比呈显著下降趋势，表明在生物量分配上锥连栎幼苗具有极大的可塑性，施水量减少时，光合产物将向地下部分迁移，增加根冠比。 |
| 关 键 词： | 干热河谷 锥连栎 施水量 种子萌发 幼苗生长 |
| 收稿时间： | 2010/7/24 0:00:00 |
| 修稿时间： | 1/7/2011 12:00:00 AM |
Effects of Water Supply on Seed Germination and Early Seedling Growth of Quercus franchetii |
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| LIU Fang-yan,ZHANG Zhi-xiang,WANG Xiao-qing,ZHANG Xin,LI Kun and SUN Yong-yu.Effects of Water Supply on Seed Germination and Early Seedling Growth of Quercus franchetii[J].Journal of Tropical and Subtropical Botany,2011,19(2):105-112. | |
| Authors: | LIU Fang-yan ZHANG Zhi-xiang WANG Xiao-qing ZHANG Xin LI Kun and SUN Yong-yu |
| Institution: | 1. National Engineering Laboratory for Tree Breeding, Key Laboratory for Genetics and Breeding of Forest Trees and Ornamental Plants of Ministry of Education, Beijing Forestry University, Nature Reserve Research and Assessment Center of State Forestry Administration; 2. Desert Ecosystem Station in Yuanmou County, State Forestry Administration of China, Research Institute of Resources Insects, Chinese Academy of Forestry,National Engineering Laboratory for Tree Breeding, Key Laboratory for Genetics and Breeding of Forest Trees and Ornamental Plants of Ministry of Education, Beijing Forestry University, Nature Reserve Research and Assessment Center of State Forestry Administration,Desert Ecosystem Station in Yuanmou County, State Forestry Administration of China, Research Institute of Resources Insects, Chinese Academy of Forestry,National Engineering Laboratory for Tree Breeding, Key Laboratory for Genetics and Breeding of Forest Trees and Ornamental Plants of Ministry of Education, Beijing Forestry University, Nature Reserve Research and Assessment Center of State Forestry Administration,Desert Ecosystem Station in Yuanmou County, State Forestry Administration of China, Research Institute of Resources Insects, Chinese Academy of Forestry,Desert Ecosystem Station in Yuanmou County, State Forestry Administration of China, Research Institute of Resources Insects, Chinese Academy of Forestry |
| Abstract: | The effects of water supply on seed germination, seedling morphology, and biomass allocation of Quercus franchetii were studied. The results showed that water supply affected significantly the seed germination of Q. franchetii. With increment of water supply, the germination rate, germination index, germination time, and germination duration of seeds increased, but germination time lag and coefficient of germination rate decreased. All of seedlings could survive under water supply of 4-12 mm per times. However, the accruements of seedling growth and biomass accumulation rate of Q. franchetii reduced with decreasing water supply. Meantime, water supply level had significant effects on biomass allocation of seedlings. The ratio of root-to-shoot of seedlings declined substantially with increment of water supply. Under low water supply, seedlings could transport photosynthates from leaves to belowground for increasing root-to-shoot ratio. |
| Keywords: | Dry-hot valley Quercus franchetii Water supply Seed germination Seedling growth |
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