卧龙自然保护区土地利用变化对土壤性质的影响
Effects of land use changes on soil properties in Wolong Nature Reserve
查看参考文献16篇
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文摘
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森林景观受干扰后的次生演替、人工林种植与农业耕作等在许多方面影响着土壤性质的变化。研究选取了四川卧龙自然保护区作为研究地点，阐述湿润高山区的土地利用方式与土壤性质之间的关系。选择了六种典型的土地利用方式加以比较，方差分析结果表明，不同土地利用之间土壤容重、全氮、有机碳、速效磷、速效钾的含量差异显著。相比之下，农田土壤养分含量偏低，而灌丛有着较高的有机碳、总氮及有效氮含量。0～40cm土壤碳的储量变化幅度不大。综合土壤退化指数表明，坡耕地，撂荒地与人工林有土壤退化的趋势，而灌丛与次生林对土壤的性质有着改善的作用。人工林年龄与土壤有机碳、有机氮的含量正相关。 |
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其他语种文摘
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Natural secondary succession, forest planting and agricultural practices after deforestation or human disturbance affect soil properties in many aspects. Characterizing soil nutrients in relation to land use/land cover types and history is important for understanding how ecosystems work and assess the effects of future land use change. A study was initiated in Wolong Nature Reserve, Sichuan province, China to elucidate the complex relationships in the humid mountainous region. Six typical ecosystems (natural forestland, grassland, shrubby land, secondary forestland, cultivated land and reforested land) were compared.Significant differences among land use were found for soil bulk density (BD), total nitrogen (TN). Cultivated land had the lowest levels for most soil nutrients compared to other ecosystems and shrubby land had a higher soil organic carbon (SOC), total nitrogen (TN) and available nitrogen (AN). There was no much difference in 0-40 cm soil carbon mass between different land use practices. Soil carbon storage (TC) of different land use indicated that land use had a greater effect on SOC greater than on BD. The comprehensive soil deterioration index (DI) showed that the cultivated land, grassland and reforested land had the lower and negative values, while the shrubby land and secondary forestland had positive values, 12% and 1% respectively. The results gave a hint that in areas where the climate is fit for secondary succession "leave the nature as it is" is a better choice for the policy of "returning farmland to forest land" in China especially for the mountainous region lack of labor and finance support. Five reforestation periods were arranged from 0-10, 11-20, 21-30, 31-40 and 41-50 years. The results showed that reforestation could greatly change soil properties. The BD, SOC and TN were significantly different between the reforested periods, but the pH, TK, AN, AP and AK showed no significant trends. Further studies on the relationship of reforestation and the soil properties gave the results that the TC and TN had a good linear relationship with the reforested years and the DI index increased since reforestation. |
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来源
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地理研究
,2002,21(6):682-688 【核心库】
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关键词
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土壤性质
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土地利用
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土壤退化指数
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卧龙
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地址
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中国科学院生态环境研究中心, 中科院系统生态开放实验室, 北京, 100085
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-0585 |
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学科
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社会科学总论 |
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基金
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国家973计划
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中国科学院知识创新工程项目
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文献收藏号
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CSCD:1011016
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参考文献 共
16
共1页
|
|
1.
Fu B J.
The relationships between land use and soil conditions in the hilly area of the Loess Plateau in northern Shaanxi, China. Catena,2000,39:69-78
|
CSCD被引
1
次
|
|
|
|
|
2.
Montagnini F. Managing forest fallows: improving the economics of swidden agriculture.
Ambio,1997,26(2):118-123
|
CSCD被引
2
次
|
|
|
|
|
3.
刘彦随. 中国可持续发展问题与土地利用/覆被变化研究.
地理研究,2002,5(3):324-330
|
CSCD被引
154
次
|
|
|
|
|
4.
Islam K R. Land use effects on soil quality in a tropical forest ecosystem of Bangladesh.
Agriculture, Ecosystems and Environment,2000,79:9-16
|
CSCD被引
121
次
|
|
|
|
|
5.
刘光菘.
土壤理化分析与剖面描述,1996:50-112
|
CSCD被引
1
次
|
|
|
|
|
6.
Adejwon J O. A comparison of soil properties under different land use types in a part of the Nigerian cocoa belt.
Catena,1988,15:319-331
|
CSCD被引
1
次
|
|
|
|
|
7.
Lowery B. Physical properties of selected soils by erosion class.
Journal of Soil and Water Conservation,1995,50:306-311
|
CSCD被引
41
次
|
|
|
|
|
8.
Davidson E A. Change of soil carbon inventories following cultivation of previously untilled soils.
BIogeochemistry,1993,20:161-193
|
CSCD被引
135
次
|
|
|
|
|
9.
Post W M. Soil Carbon Sequestration and land-use change: processes and potential.
Global Change Biology,2000,6:3117-328
|
CSCD被引
1
次
|
|
|
|
|
10.
Brejda J J. Soil changes following 18 years of protection from grazing in Arizona chaparral.
The Southwestern Naturalist,1997,42:478-487
|
CSCD被引
3
次
|
|
|
|
|
11.
Carter M R. Organic C and N storage, and organic C fractions, in adjacent cultivated and forested soils of eastern Canada.
Soil & Tillage Research,1998,47:253-261
|
CSCD被引
14
次
|
|
|
|
|
12.
王绍强. 中国陆地土壤有机碳库的估算.
地理研究,1999,18(4):348-355
|
CSCD被引
1
次
|
|
|
|
|
13.
Susan J P. Carbon distribution in subalpine forests and meadows of the Olympic Mountains Washington.
Soil Science Society American Journal,2000,64:1834-1845
|
CSCD被引
1
次
|
|
|
|
|
14.
Wang J. Soil nutrients in relation to land use and landscape position in the semi-arid small catchment on Loess Plateau in China.
Journal of Arid Environments,2001,48:537-550
|
CSCD被引
64
次
|
|
|
|
|
15.
Brinkley D. The influence of tree species on forest soils processes and patterns.
Proceedings of the Trees and Soils Workshop,1995:1-34
|
CSCD被引
1
次
|
|
|
|
|
16.
Condron L M. Influence of conifers on the forms of phosphorus in selected New Zealand grassland soils.
Biological Fertility Soils,1996,21:37-42
|
CSCD被引
10
次
|
|
|
|
|
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