广西速生桉种植的空间分布及生态特征
NIE Xin ZHANG Wenbo XUE Lixia. The spatial distribution of fast-growing Eucalyptus and ecological characteristics in Guangxia[J]. Journal of Beijing Normal University(Natural Science), 2017, 53(2): 215-221. DOI: 10.16360/j.cnki.jbnuns.2017.02.017
Citation: NIE Xin ZHANG Wenbo XUE Lixia. The spatial distribution of fast-growing Eucalyptus and ecological characteristics in Guangxia[J]. Journal of Beijing Normal University(Natural Science), 2017, 53(2): 215-221. DOI: 10.16360/j.cnki.jbnuns.2017.02.017
广西速生桉种植的空间分布及生态特征
北京师范大学地理学与遥感科学学院,地表过程与资源生态国家重点实验室,100875,北京
详细信息
中图分类号: P935
计量 文章访问数: 0186 HTML全文浏览量: 036 PDF下载量: 064The spatial distribution of fast-growing Eucalyptus and ecological characteristics in Guangxia
School of Geography,State Key Laboratory of Earth Surface Processes and Resources Ecology, Beijing Normal University,100875,Beijing,China;)
摘要
摘要: 广西是我国速生桉种植面积最大的省份之一,在大面积种植速生桉带来经济效益的同时,速生桉种植现状、
生态特征及其环境影响也日益受到关注.基于第一次水利普查水土保持情况普查数据,以广西为例,综合分析了速生桉
种植面积、空间分布及生态特征:1)广西速生桉种植面积已占到区国土面积的9.7%,并呈现“东南多西北少”的空间分
布特点;2)广西速生桉林分布的平均坡度为20.4°,集中分布在8°~35°的坡面上,这与有林地坡度分布存在明显差异,有
林地分布的平均坡度为26.9°,主要分布在大于25°的陡坡上;3)速生桉林分布的平均郁闭度为33.2%,有林地平均郁闭
度为53.0%,速生桉的郁闭度相对有林地明显偏小,这与速生桉作为速生树种的特殊形态特征有关;4)速生桉林的平均
盖度为61.9%,有林地平均盖度为81.1%,速生桉的盖度明显偏小.
Abstract: Guang xi region has the largest area of fast-growing Eucalyptus plants in China.Considerable
economic benefits come with wide planting of fast-growing Eucalyptus,therefore more attention has been
focused on planting, ecological characteristics of and environmental impacton fast-growing Eucalyptus plants.
Census data of the first Soiland Water Conservation Water Conservancy Survey in Guangxi were used to
analyze planting area, spatial distribution and ecological characteristics of fast-growing Eucalyptus. Fast growing Eucalyptus has been found to be planted in9.7 % of the province, with the feature of “more in the southeast than in the northwest”. The average slope of fast-growing Eucalyptus forest in Guangxi was found to
be 20.4° ,concentrated on the slope8°~35°.This was significantly different from the distribution of wood land
slope,distribution of wood land averaged 26.9° ,mainly on steeps lopes greater than25°.The average crown
density of fast-growing Eucalyptus forest distribution was found to be 33.2%,forest canopy density average
was 53.0%. Eucalyptus canopy density in wood land significantly was found to be smaller,which was related to
the special morpho logical characteristics of fast-growingEucalyptus as one of fast growing species.The average
coverage of fast-growing Eucalyptus forests was 61.9%,wood land average coverage of 81.1%,coverage of
fast-growing Eucalyptus was significantly less.
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