摘要
香榧为我国特有的珍贵经济树种,是近年来发展较快、经济效益最好的经济林树种之一。以RS、GIS技术为工具,利用研究区高分辨率IKONOS遥感影像、数字高程模型、土壤图和实地调查等资料,探索会稽山区香榧种群生境特征。结果表明,香榧分布对地形因子的选择性强,96.2%的香榧分布在300~600 m高度带上,93.6%分布区坡度界于10°~30°,香榧对光照需求较高,74.4%分布于阳坡和半阳坡。香榧分布区母岩类型主要为酸性凝灰岩,香榧对土壤肥力要求较高,75.2%的分布区土壤有机质含量大于2%,61.6%的分布区土层厚度大于70 cm,最适宜的土壤类型为山地黄泥土和黄泥土。通过香榧核心区和对照区气候资料的对比分析,阐明香榧核心区的气候特征与分配模式,证实香榧核心区的小气候与香榧生长发育关键时期的气候需求的高度匹配。研究结果为香榧的引种、扩种和区划提供理论依据,对其产业化发展和可持续利用具有重要意义。
Chinese torreya（Torreya grandis cv.Merrillii） is a rare economic tree in China,which is extended rapidly and has significant economic value.The habitat characteristics of Chinese torreya in Kuaiji Mountains were analyzed with a series of data,such as IKONOS imagery,Digital Elevation Model（DEM）,soil and field survey data based on GIS.The results showed that Chinese torreya exhibited high selectivity of topographical factors,96.2% occurred at the elevation belts between 300~600 m,93.6% grew on the slopes between 10°~30° and 74.4% belonged to sunny or half-sunny slopes.The parent rock type of the distribution area was mainly acidic tuff.Chinese torreya had a high requirement for soil fertility and the most suitable soil type was mountain yellow earth and yellow earth.The distribution area with soil organic matter content higher than 2% accounted for 75.2% of the total area and 61.6% of soil thickness was larger than 70 cm.By comparing the analysis of climate data between core area and control area,the climatic characteristics and distribution
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2010年第3期523-527,共5页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家自然科学基金资助项目(30671212)
国家“十一五”科技支撑重大项目(2006BAD03A1806)
中国林科院中央级公益性科研专项(CAFYBB2008006)
关键词
GIS
DEM
香榧
空间格局
会稽山区
GIS
DEM
Chinese torreya
spatial pattern
KuaijiMountains
