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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)  2015, Vol. 41 Issue (6): 703-711    DOI: 10.3785/j.issn.1008-9209.2015.05.291
农业科学     
荒漠草原人工柠条林对土壤质地演进过程的影响
宋乃平*， 吴旭东， 潘军， 曲文杰， 周娟， 安超平
宁夏大学西北土地退化与生态恢复国家重点实验室培育基地/西北退化生态系统恢复与重建教育部重点实验室，银川 750021
Impacts of artificial Caragana intermedia stand on soil texture evolution in desert steppe.
Song Naiping*, Wu Xudong, Pan Jun, Qu Wenjie, Zhou Juan, An Chaoping
(Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China/Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in North-western China of Ministry of Education, Ningxia University, Yinchuan 750021, China)
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摘要： 为了研究荒漠草原区人工柠条（Caragana intermedia）林建植后土壤质地演进过程，构建了10 a、17 a、27 a的林龄序列和柠条灌丛内部、边缘、外部的空间序列，分析了2个序列土壤颗粒组成、黏粉粒富集程度、分形维数以及与其密切相关的土壤有机碳和全氮含量。结果表明：1）土壤质地随着人工柠条林建植年限的增加从灌丛内部、边缘到外部均逐渐得到改善，表现为土层在垂直方向上的“自上而下”和水平方向上以灌丛为中心的“由内到外”的渐进改善过程。柠条灌丛内部的土壤分形维数比外部平均增加0.189±0.401。2）柠条灌丛发育显著增强了退化草原中土壤有机碳和全氮的空间异质性，灌丛内部土壤有机碳和全氮含量比外部分别增加（0.087±0.100）%和（0.008±0.010）%，显示出柠条的“肥岛效应”。土壤有机碳和全氮含量与土壤黏粉粒含量呈极显著正相关（P<0.01）。3）人工柠条林建植对荒漠草原区土壤质地和碳氮资源具有非常明显的协同演进作用。说明柠条林建植对于改善荒漠草原地区的土壤质地及土壤有机碳和全氮含量具有显著作用，但当进入老龄林阶段后土壤质地改善缓慢。
Abstract: Planting Caragana has achieved remarkable success in the recovery of desertification land in desert steppe because of its excellent biological characteristics, such as tolerance of sand burying, drought-resistance, and so on. Thus, its sustainability of ecological restoration becomes one of the key topics of concern. Restoration of soil habitat is the foundation for ecosystem being fully restored, and soil texture is the core indicator to evaluate soil properties. In this study, soil texture evolution process and effects after planting C. intermedia stand were investigated to understand its role in desert steppe ecosystem. Series of different stand ages (10 a, 17 a, 27 a) and space sequences (from the inside via the edge to the outside of shrubs) were designed to analyze the spatiotemporal rules of soil particle composition, increment in silt and clay, volume fractal dimension of soil particles, as well as the contents of soil organic carbon (SOC) and soil total nitrogen (STN)． The results showed that: 1) The percentages of fine sand (ranging from 0.05 mm to 0.1 mm) were higher than those of silt and clay, coarse sand and gravel sand in the soil particle composition. With the increase of C. intermedia stand ages, soil texture was improved gradually according with vertical orientation of soil depth from top to bottom and horizontal direction from the inside to the outside of shrubs. The volume fractal dimension of soil particles inside shrubs increased by 0.189±0.401 on average compared to the outside. 2) Spatial heterogeneity of SOC and STN in the surface soil layer changed significantly with the increase of C. intermedia stand ages. SOC and STN inside shrubs increased by (0.087±0.100)% and (0.008±0.010)% respectively in comparison to those outside shrubs, which indicated the fertility island effect by C. intermedia. The contents of SOC and STN were significantly and positively correlated with the content of silt and clay (P<0.01). 3) Caragana intermedia plantation exerted a distinct co-succession influence on the content of silt and clay and the resource of carbon and nitrogen in desert steppe. In conclusion, soil texture and soil fertility states are significantly improved after the construction of Caragana plantation. However, soil texture is improved more slowly when plantation aged.
出版日期: 2015-11-20
CLC:  S 152  
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宋乃平
吴旭东
潘军
曲文杰
周娟
安超平

引用本文:

宋乃平，吴旭东，潘军，曲文杰，周娟，安超平. 荒漠草原人工柠条林对土壤质地演进过程的影响[J]. 浙江大学学报(农业与生命科学版), 2015, 41(6): 703-711.

Song Naiping, Wu Xudong, Pan Jun, Qu Wenjie, Zhou Juan, An Chaoping. Impacts of artificial Caragana intermedia stand on soil texture evolution in desert steppe.. Journal of Zhejiang University (Agriculture and Life Sciences), 2015, 41(6): 703-711.

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http://www.zjujournals.com/agr/CN/10.3785/j.issn.1008-9209.2015.05.291    或    http://www.zjujournals.com/agr/CN/Y2015/V41/I6/703

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