| 新疆3种主要森林类型根系生物量变化特征研究 |
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| 引用本文： | 张毓涛,胡莎莎,李吉玫,芦建江,王文栋.新疆3种主要森林类型根系生物量变化特征研究[J].干旱区地理,2013,36(2):269-276. |
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| 作者姓名： | 张毓涛 胡莎莎 李吉玫 芦建江 王文栋 |
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| 作者单位： | 1. 新疆林业科学院森林生态研究所,新疆乌鲁木齐,830000
2. 新疆农业大学草业与环境科学学院,新疆乌鲁木齐830052;新疆林业科学院森林生态研究所,新疆乌鲁木齐830000 |
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| 基金项目： | 国家林业局林业公益性行业科研专项项目，天山森林生态站开放基金联合资助 |
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| 摘 要： | 根系生物量是准确评估森林生态系统碳储量及碳汇功能的一个重要数据。采用标准木全收获法研究了新疆3种主要森林树种根系生物量，并分析了其在垂直梯度上的分配规律和随年龄的变化特点。结果表明：（1）新疆杨、西伯利亚落叶松和阿勒泰冷杉根系总生物量分别为43.409、42.152 t/hm2和16.19 t/hm2；（2）根系生物量随土壤深度增加迅速减少，约88.37%以上的根系生物量集中分布在0～40 cm土层中，在超过40 cm土层中，根系生物量降至较低水平（约为8.3%）；（3）随林分年龄的增长，各林分根系总生物量呈递增趋势，在中龄林根系生物量增长速率达到最大。各级根系中粗根、中根及细根生物量随年龄的增长所占比例呈现递减规律，而其根桩和毛细根生物量差异较大，所占比例随年龄的增大基本呈增大趋势；（4）在表层土壤中各林分在林木的幼龄及中龄阶段根系生物量都处于较高比例，之后呈下降趋势后维持在一定水平基本不变，而深层土壤中各林分在幼龄阶段都处于一个较低的水平，后以一定比例逐渐增长；（5）新疆杨、西伯利亚落叶松和阿勒泰冷杉根系年平均生产力分别为：1.070 8 t·hm-2·a-1、1.014 4 t·hm-2·a-1和0.910 7 t·hm-2·a-1。
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| 关 键 词： | 森林类型 根系 生物量 年龄 径级 |
| 收稿时间： | 2012-08-11; |
Characteristic of root biomass of three main forest types in Xinjiang |
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| ZHANG Yu-tao,HU Sha-sha,LI Ji-mei,LU Jian-jiang,WANG Wen?dong.Characteristic of root biomass of three main forest types in Xinjiang[J].Arid Land Geography,2013,36(2):269-276. |
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| Authors: | ZHANG Yu-tao HU Sha-sha LI Ji-mei LU Jian-jiang WANG Wen?dong |
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| Institution: | （1 Xinjiang Academy of Forestry Institute of Forest Ecology Urumqi 830000，Xinjiang，China; 2 College of Pratacultural and Environmental Sciences,Xinjiang Agricultural University,Urumqi 830052，Xinjiang，China） |
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| Abstract: | Root is an important function organs of the plants，has an irreplaceable role in material cycle and ecergy flow of the forest ecosystems，and root biomass is one of important data to accurately evaluate carbon storage and carbon function of forest ecosystem. This paper adopt the methods of harvest standard tree to research root biomass of three main forest tree species in Xinjiang，And vertical distribution of below ground root biomass of three species and its variation among different age structure were also investigated in order to understand the ecosystem function in the Xinjiang forest ecosystem. The aim was to provide scientific reference for the study of forest ecosystem root biomass and productivity，and the basic data for the further estimation of cabon storage and carbon sink of the forest in Xinjiang. Results showed that：（1）Root biomass of Larix sibirica Ledeb，Abies sibirica Ledeb and Populus alba var pyramidalis Bge are 43.409 t/hm2，42.152 t/hm2 and 16.19 t/hm2. （2）Root biomass declines with increasing soil depths. Approximately more than 88.37% root biomass distributes in 0～40 cm soil layers and approximately 8.3% root biomass distributes below 40 cm depth. （3）With increasing of stand age，the root biomass always increases. of them，the increasing rate of root biomass of middle-age achieves maximum. The biomass proportion of roots with different diameter ranged as stump，middle root and fine root decreases with age increase. But the root stake and capillary root biomass are different，the proportion increases with age increase. （4）In top soil layers，the proportion of root biomass of young and middle age is in a higher level. In deeper soil layers，root biomasses of three young trees are all in a lower level.（5）Root productivity of Populus alba var pyramidalis Bge，Larix sibirica Ledeb and Abies sibirica Ledeb is 1.0708 t/ （hm2·a），1.0144 t/ （hm2·a） and 0.9107 t/ （hm2·a），respectively. |
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| Keywords: | forest stand the roots biomass age diameter class |
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