[1]闫佳兴,石文凯,韩海荣*,等. 晋北黄土丘陵沟壑区柠条锦鸡儿化学计量特征及影响因素[J].西北林学院学报,2023,38(6):29-37.[doi:10.3969/j.issn.1001-7461.2023.06.04]
　YAN Jia-xing,SHI Wen-kai,HAN Hai-rong*,et al. Stoichiometric Characteristics and Influencing Factors of Caragana korshinskii in the Hilly and Gully Region of the Loess Plateau of Northern Shanxi[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2023,38(6):29-37.[doi:10.3969/j.issn.1001-7461.2023.06.04]
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 晋北黄土丘陵沟壑区柠条锦鸡儿化学计量特征及影响因素()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第38卷
期数:
2023年第6期
页码:
29-37
栏目:
出版日期:
2023-11-30

文章信息/Info

Title:
 Stoichiometric Characteristics and Influencing Factors of Caragana korshinskii in the Hilly and Gully Region of the Loess Plateau of Northern Shanxi
文章编号:
1001-7461(2023)06-0029-09
作者:
 闫佳兴1; 2; 石文凯3; 韩海荣1; 2*; 吴会峰1; 2; 程小琴1; 2; 康峰峰1; 2; 王洁茹1; 2; 李华一1; 2
 （1.北京林业大学 生态与自然保护学院，北京 100083；2.七老图森林生态系统国家定位观测研究站，内蒙古 赤峰 024400；3.山西省林业和草原工程总站，山西 太原 030012）
Author(s):
 YAN Jia-xing1; 2; SHI Wen-kai3; HAN Hai-rong1; 2*; WU Hui-feng1; 2; CHENG Xiao-qin1; 2; KANG Feng-feng1; 2; WANG Jie-ru1; 2; LI Hua-yi1; 2
 (1.School of Ecology and Nature Conservation,Beijing Forestry University,Beijing 100083,China; 2.Qilaotu Mountain National Observation and Research Station of Chinese Ecosystem,Chifeng 024000,Inner Mongolia,China; 3.Shanxi Forestry and Grassland Engineering Station,Taiyuan 030012,Shanxi,China)
关键词:
 ; 柠条锦鸡儿; 化学计量; 养分累积; 适应策略; 土壤因子
Keywords:
Caragana korshinskii;  stoichiometry;  nutrient accumulation;  adaptation strategy;  soil factor
分类号:
S793.3
DOI:
10.3969/j.issn.1001-7461.2023.06.04
文献标志码:
A
摘要:
 以晋北黄土丘陵沟壑区柠条锦鸡儿人工林为研究对象，通过分析柠条锦鸡儿枝叶化学计量特征及其与土壤因子的关系，揭示柠条锦鸡儿养分分配格局与环境适应策略。结果表明，1）柠条锦鸡儿叶N、P含量为混交林中较高，枝N、P含量则相反；叶C∶P、N∶P为混交林中较低，樟子松＋柠条锦鸡儿混交林有效缓解了P限制；不同器官下，N、P为叶＞枝，C∶P、C∶N为枝＞叶。种植方式与器官对C、N、P及其计量比影响较大。2）纯林与混交林间C、N、P两两比例关系差异不显著，C的累积速率显著大于N、P；器官中，叶C-N、C-P为异速比例关系，而枝为等速比例关系，C养分累积速率为叶>枝，枝叶N、P累积速率较为一致。3）在不同种植方式下柠条锦鸡儿叶、枝P含量受土壤含水量、有机碳、全磷(TP)的影响明显；器官下，叶比枝更敏感，易受土壤因子的影响，土壤含水量、TP、有机碳是影响叶养分及比例的关键土壤因子，TP是影响枝养分及比例的关键土壤因子。综上，在土壤养分与水分限制下，柠条锦鸡儿采取叶＞枝养分分配格局，快速累积C的适应策略，其化学计量与土壤因子关系密切与不同种植方式有关，种植方式会影响柠条锦鸡儿C、N、P及计量比，但不会改变C、N、P间的特定耦合比例。
Abstract:
 The study was carried out in Caragana korshinskii plantations in the hilly and gully region of the Loess Plateau of Northern Shanxi Province,China.By analyzing the stoichiometric characteristics of branches and leaves of C.korshinskii and their relationships with soil factors,the nutrient allocation patterns and environmental adaptation strategies of C.korshinskii were revealed.The results showed that 1) the leaf N and P contents of C.korshinskii were both higher in the mixed forest,while the opposite was true for branch N and P contents.Leaf C∶P and N∶P ratios were lower in mixed forests,P.sylvestris var.mongolica+C.korshinskii mixed forest effectively mitigated P limitation.For all organs,the contents of N and P were in the order of leaf>branch,and the ratios of C∶P and C∶N were branch>leaf.The C,N,and P contents and their stoichiometric ratios were significantly affected by planting patterns and organs.2) No significant differences were found between the pure and mixed forests in proportional relationship among C,N and P,the rate of carbon accumulation C.korshinskii was significantly higher than that of N and P.For the organs,the proportion of C-N and C-P in leaves was allometric,while the proportion of C-P in branches was isokinetic.The rate of C nutrient accumulation in leaves was remarkably higher than in branches,and the rate of N and P accumulation in branches was more consistent.3) Under different planting patterns,the P content of C.korshinskii leaves and branches were significantly affected by soil water content,organic carbon and total phosphorus.The leaves were more susceptible to soil factors than branches.Soil water content,total phosphorus and organic carbon were the key soil factors affecting leaf nutrients and proportion,while total phosphorus was the key soil factor affecting branch nutrients and proportion.To summarize,under the limitation of soil nutrient and moisture,C.korshinskii employs the nutrient distribution pattern of higher in leaves than branches,and rapid carbon accumulation strategy to overcome the limitation.The close relationship between stoichiometry and soil factors are related to planting patterns.C,N,P and metering ratio of C.korshinskii are affected by planting patterns,but the specific coupling ratio of C,N,P of C.korshinskii are not changed.

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备注/Memo

备注/Memo:
 收稿日期：2022-08-30修回日期：2022-10-31
基金项目：国家重点研发计划（2019YFA0607300）；林业科技创新平台运行补助项目（2020132075）。
第一作者：闫佳兴。研究方向：森林生态学、植物功能性状。E-mail:jiajiay1717@163.com
*通信作者：韩海荣，博士，教授，博士生导师。研究方向：森林生态学、生态规划与管理。E-mail:hanhr@bjfu.edu.cn
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