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浙江大学学报（农业与生命科学版）
浙江大学学报(农业与生命科学版)  2013, Vol. 39 Issue (6): 687-694    DOI: 10.3785/j.issn.1008-9209.2012.12.131
资源与环境科学     
在茶园生产周期过程中茶树群落生物量和碳储量动态估算
张敏1,2， 陈永根3， 于翠平1， 潘志强1， 范冬梅1， 骆耀平1， 王校常1*
（1.浙江大学农业与生物技术学院茶叶研究所，杭州 310058；2.临安市农业局，浙江 临安 311300；3.浙江农林大学环境与资源学院，浙江 临安311300）
Dynamic assessments of plant biomass and carbon storage during the production cycle of tea gardens
ZHANG Min1,2, CHEN Yonggen3, YU Cuiping1, PAN Zhiqiang1, FAN Dongmei1, LUO Yaoping1, WANG Xiaochang1 *
(1. Institute of Tea Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China; 2. Lin’an Agricultural Bureau, Lin’an, Zhejiang 311300, China; 3. College of Environmental and Resource Sciences, Zhejiang A & F University, Lin’an, Zhejiang 311300, China)
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摘要： 为定量评估在茶树生产周期过程中茶树群落碳储量积累规律和积累潜力，基于1950—2011年间全国各地不同树龄茶树实际生物量数据，建立了在典型的双条植种植方式下中国茶园的茶树现存地上部生物量与树龄之间的自然指数经验关系方程，进而经过茶树根冠比及碳转换系数的换算得到在茶园生产周期（1~30年）过程中茶树碳储量的年际动态；同时，基于以往关于茶树光合生产潜力的研究结果及茶叶产量的时间增长规律，建立茶树现存生物量年增长与茶叶产量之间的换算关系，估算不同茶区及全国茶园茶树的理论碳储量.通过茶树树龄和生物量之间的自然指数经验关系方程换算的结果表明，幼年期（1~4年）和成年中前期(5~15年)茶树碳储量平均以（4.5±0.4） t/(hm2·a) 和（0.95±0.05） t/(hm2·a) 递增，在成年后期(25年)茶树碳储量约可达30.6 t/hm2；此经验方程所模拟的成年茶树碳储量值相当于在2%光能利用率条件下的碳储量理论值.现有全国平均茶叶产量水平仅达0.5%光能利用率，全国茶园总体碳贮量约为（9.1±1.4） t/hm2；若优化茶园管理，将产量普遍提高至丰产水平，茶园总体碳贮量则有成倍的上升空间.综上所述，中国茶园茶树碳库是农林生态系统碳库的重要组成；所建立的茶树生物量与树龄、茶叶产量之间的经验关系方程可定量评估在茶树生产周期过程中茶树群落碳储量.
Abstract: Tea (Camellia sinensis) is a kind of evergreen shrub or tree, which has been widely planted as an important economic crop in mountainous tropical and subtropical regions of China. Tea gardens are considered both ecologically friendly and economically profitable due to their high plant standing biomass and important role in soil and water conservations. Though it is recognized that the carbon sequestration potential should be huge in the plant and soil of tea gardens, few researches have been carried to quantify their carbon storage and balance. In the tea producing regions of China, tea garden area occupies a large proportion of the total forest area (e.g. 3.1% in Zhejiang Province). Tea gardens might play an important role in the carbon sink of forest ecosystems in those areas. Based on publications between 1950 and 2011 on tea plant growth in China, regression models on the relationship between tea stand biomass and tea plant age or tea yield were established to find out how its carbon storage capacity changes and how much its carbon storage capacity can achieve during a production cycle of a common doublerow tea garden. An exponential growth model was established between tea plant aboveground biomass (Ba) and its age (t): Ba=-14.95+56.3×(1-e-0.27t). Modeling results showed that tea biomass increased rapidly during the first 10 years and then slowly after the first 15 years. Carbon (C) mass of 10 and 15 yearold tea plants was 92% and 98% of that (30.6 t/m2) of 25 yearold tea plants respectively. Carbon accumulation rate was (4.5±0.4) t/(hm2·a) for tea plants of 14 yearold and was (0.95±0.05) t/(hm2·a) for those of 515 yearold. When the shoot/root biomass ratio ranged from 1.68 to 2.34, the C mass of 15yearold tea plants ranged from 31.31 to 28.02 t/hm2. A model for C storage in tea garden was set up based on potential photosynthetic productivity of tea plants and tea yield, thus C storage capacity of tea plants in various tea production regions was estimated. With an efficiency of solar energy utilization of 0.5% currently, the corresponding total C storage was amount to (9.1±1.4) t/hm2 in the tea gardens of China. As for 15yearold tea plants, the C mass of 60 t/hm2 given by the exponential model was close to the theoretical value (56.41 t/hm2) with an efficiency of solar energy utilization of 2%, and the C mass could be up to 70.5 t/hm2 in tea gardens if tea yield was increased. In a word, it is important to quantify the carbon stock through modeling on the changes of biomass C accumulation with tea plant age rather than based on limited field sampling data. It is also noted that plant C pool of tea gardens is one of main agroforestry C pools in tea production regions and tea garden has a high plant C sequestration potential in China.
出版日期: 2013-11-20
CLC:  X 171.3  
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张敏1
2
陈永根3
于翠平1
潘志强1
范冬梅1
骆耀平1
王校常1*

引用本文:

张敏1,2， 陈永根3， 于翠平1， 潘志强1， 范冬梅1， 骆耀平1， 王校常1*. 在茶园生产周期过程中茶树群落生物量和碳储量动态估算[J]. 浙江大学学报(农业与生命科学版), 2013, 39(6): 687-694.

ZHANG Min1,2, CHEN Yonggen3, YU Cuiping1, PAN Zhiqiang1, FAN Dongmei1, LUO Yaoping1, WANG Xiaochang1 *. Dynamic assessments of plant biomass and carbon storage during the production cycle of tea gardens. Journal of Zhejiang University (Agriculture and Life Sciences), 2013, 39(6): 687-694.

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http://www.zjujournals.com/agr/CN/10.3785/j.issn.1008-9209.2012.12.131    或    http://www.zjujournals.com/agr/CN/Y2013/V39/I6/687

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