| 祁连山青海云杉林叶片—枯落物—土壤的碳氮磷生态化学计量特征 |
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| 引用本文： | 赵维俊,刘贤德,金 铭,张学龙,车宗玺,敬文茂,王顺利,牛 赟,齐 鹏,李雯靖.祁连山青海云杉林叶片—枯落物—土壤的碳氮磷生态化学计量特征[J].土壤学报,2016,53(2):477-489. |
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| 作者姓名： | 赵维俊 刘贤德 金 铭 张学龙 车宗玺 敬文茂 王顺利 牛 赟 齐 鹏 李雯靖 |
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| 作者单位： | 1. 甘肃省祁连山水源涵养林研究院，甘肃张掖 734000; 甘肃农业大学林学院，兰州 730070; 甘肃张掖生态科学研究院甘肃省祁连山生态科技创新服务平台，甘肃张掖 734000;2. 甘肃省祁连山水源涵养林研究院，甘肃张掖 734000; 甘肃张掖生态科学研究院甘肃省祁连山生态科技创新服务平台，甘肃张掖 734000;3. 甘肃农业大学资源环境学院,兰州,730070;4. 甘肃省祁连山水源涵养林研究院,甘肃张掖,734000 |
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| 基金项目： | 国家自然科学基金项目（31260141）、国家林业公益性行业科研专项（201104009-08 )、甘肃省基础研究创新群体项目（145RJIG337）和甘肃省科技创新服务平台（144JTCG254）共同资助 |
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| 摘 要： | 以祁连山排露沟流域青海云杉(Picea crassifolia)林为研究对象,研究其不同海拔梯度叶片—枯落物—土壤间的碳、氮、磷生态化学计量学特征,并对其相关性进行分析。结果表明,在不同海拔梯度上,叶片、枯落物和土壤C∶N比的变化范围分别为22.95~36.72、21.41~41.61、12.41~20.70,均值大小依次为枯落物叶片土壤,C∶P和N∶P比的变化范围分别为510.2~739.8、398.6~698.1、134.1~219.7和18.13~26.86、6.71~26.28、7.96~16.56,均值大小依次均为叶片枯落物土壤。随海拔梯度的增加,除土壤C∶N比差异性不显著外(p0.05),叶片和枯落物的碳、氮、磷化学计量比在不同海拔间的差异显著性各不相同。叶片、枯落物和土壤C∶N比两两均具有显著正相关(p0.05),叶片与枯落物及土壤与枯落物C∶P比均具有显著负相关(p0.05),叶片与土壤C∶P比及不同组分N∶P比之间相关性均不显著(p0.05)。该研究结果有助于进一步了解青海云杉林碳、氮、磷在不同组分间的相互作用规律与机制。
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| 关 键 词： | 青海云杉林 叶片 枯落物 土壤 生态化学计量学 |
| 收稿时间： | 2014/10/10 0:00:00 |
| 修稿时间： | 2015/6/30 0:00:00 |
Ecological Stoichiometric Characteristics of Carbon, Nitrogen and Phosphorus in Leaf-Litter-Soil System of Picea Crassifolia Forest in the Qilian Mountains |
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| ZHAO Weijun,LIU Xiande,JING Ming,ZHANG Xuelong,CHE Zongxi,JING Wenmao,WANG Shunli,NIU Yun,QI Peng and LI Wenjing.Ecological Stoichiometric Characteristics of Carbon, Nitrogen and Phosphorus in Leaf-Litter-Soil System of Picea Crassifolia Forest in the Qilian Mountains[J].Acta Pedologica Sinica,2016,53(2):477-489. |
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| Authors: | ZHAO Weijun LIU Xiande JING Ming ZHANG Xuelong CHE Zongxi JING Wenmao WANG Shunli NIU Yun QI Peng and LI Wenjing |
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| Institution: | Academy of Water Resources Conservation Forests in Qilian Mountains of Gansu Province,Academy of Water Resources Conservation Forests in Qilian Mountains of Gansu Province,Academy of Water Resources Conservation Forests in Qilian Mountains of Gansu Province,Academy of Water Resources Conservation Forests in Qilian Mountains of Gansu Province,Academy of Water Resources Conservation Forests in Qilian Mountains of Gansu Province,Academy of Water Resources Conservation Forests in Qilian Mountains of Gansu Province,Academy of Water Resources Conservation Forests in Qilian Mountains of Gansu Province,Academy of Water Resources Conservation Forests in Qilian Mountains of Gansu Province,College of Resources and Environmental Sciences,Gansu Agricultural University and Academy of Water Resources Conservation Forests in Qilian Mountains of Gansu Province |
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| Abstract: | Ecological stoichiometric ratios of C,N and P are important indices characterizing process and functions of a forest ecosystem. Picea crassifolia is an important constructive or dominant species of the subalpine mountain forest vegetation in the Qilian Mountains,and its forest is a typical kind of water conservancy forest. Based on field survey and laboratory analysis,the objective of this study with the Picea crassifolia forest in the Pailugou watershed of the Qilian Mountains selected as subject,the leaf、litters and soil at different elevation gradient(2 900~3 300 m)were selected to measure their organic carbon (C),total nitrogen(N)and total phosphorous(P)contents,carried out on ecological stoichiometric characteristics of carbon,nitrogen and phosphate in the leaf-litters-soil systems of the Picea crassifolia forest different in elevation gradient and their correlations using the principles and methodology of ecological stoichiometry. Results show that carbon,nitrogen and phosphorus ecological stoichiometric ratios of Picea crassifolia forest in elevation gradient indicate that different variation laws and significance of difference with altitude increasing. Among them,C∶N ratio in leaf and soil of Picea crassifolia forest increased gradually, C∶N ratio in litter increased gradually with the increase of altitude and then decreased at 3 300 m. C∶P ratio in leaf first increase and then decrease,at an altitude of 2 900 m was significantly lower than other altitude C∶P(p < 0.05). C∶P ratio in litter has no obvious change. C∶P ratio in soil first increases and then decreases,only at an altitude of 2 900 m was significantly lower than other altitude C∶P(p < 0.05). N∶P ratio in leaf and soil first increases and then decreases,the N∶P ratio of the low altitude(2 900~3 100 m) was significantly higher than that of the high altitude(3 200~3 300 m)(p < 0.05). In this systems along the elevation gradient,C∶N ratio in leaf,litters and soil varied in the range of 22.95~36.72,21.41~41.61 and 12.41~20.70,respectively,and in terms of average of the ratios,the three components of the system followed an order of litters > leaf > soil;C∶P ratio did in the range of 510.2~739.8,398.6~698.1 and 134.1~219.7,respectively,and N∶P ratio did in the range of 18.13~26.86,6.71~26.28 and 7.96~16.56,respectively,and in terms of average of either N∶P or C∶N ratio,the three followed an order of leaf > litters > soil. All the ratios in all the three components varied sharply with rising altitude,except for soil C:N ratio,which did not as much(p>0.05). Three components were significantly positively related(p>0.05)to each other in C∶N ratio,while both leaf and soil were negatively related to litters in C∶P ratio(p>0.05). And the relationships of leaf with soil C∶P ratio and with litters and soil in N∶P ratio were not obvious(p>0.05). The findings of the study help further understand interactions between carbon,nitrogen and phosphorus in the three components of the Picea crassifolia forest system and their laws and mechanisms. |
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| Keywords: | Picea crassifolia forest Soil Leaf Litter Ecological stoichiometry |
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