【作者】 韩天芳；

【导师】 赵鹏祥；

【作者基本信息】 西北农林科技大学 ， 林业， 2009， 硕士

【摘要】 本次研究主要采用地理信息系统(GIS)、遥感(RS)高新技术,对固原市原州区森林资源进行了调查,并对森林资源现状与特点进行了深入分析,包括土地资源现状(各类土地面积、森林覆盖率按乡(镇)分布情况)、森林资源现状(各类森林、林木面积蓄积结构情况、各林种面积蓄积结构情况、乔木林各龄组面积蓄积结构情况、人工林情况、经济林情况、无立木林地情况、宜林地情况、四旁树、散生木情况)等。同时,对森林资源动态进行了分析,最后对该地区的森林进行了分类经营区划。结果表明,该区林地面积占全地区土地总面积的37.1%;非林地面积土地总面积的62.9%。林地中,有林地、疏林地、灌木林、未成林造林地、无立木林地、宜林地分别占林地面积的2.29%、0.19%、20.32%、53.0%、1.71%、21.97%。该地区森林覆盖率为8.4%。乔木林、疏林地、四旁树、散生木蓄积分别占全地区活立木总蓄积的43.8%、0.79%、51.7%、4%。有林地、疏林地和灌木林地中防护林与经济林的面积比例约为994:1。乔木林龄组结构幼龄林:中龄林:近、成、过熟林,面积之比为1.53:4.38:1。人工造林乔木树种依次为落叶松、油松、云杉、杨树、山杏、榆树、软阔、苹果、刺槐、硬阔、柏类等。灌木树种依次为:沙棘、柠条、紫穗槐、山桃、胡枝子。森林覆盖率由1996年的6.1%增加到2006年的8.4%,提高了2.3%。林业发展的主要特点是林地面积比例大,林业发展空间广阔;有林地面积比例小,灌木林面积比例大;幼龄林、中龄林比例大;未成林造林地面积比例大,林木绿化率提高有空间;生态区位重要,公益林面积比例大;退耕还林工程建设质量高,效益明显;沙棘资源丰富,林业特色经济有潜力;资源分布不均,有地域性。更多还原

【Abstract】 Using Geographic Information systems (GIS), Remote sensing (RS),we conducted a survey of forest resources of Yuanzhou, Guyuan City, and analyzed the status and features of forest resources, including the status of land resources (total area of all kinds of land,the area of different land and the distribution of forest acreage by township ), the status quo of forest resources(construction and situation of the areas and volumes of all types of forests, trees, forest categories and age groups of highwood; situation of planted forest, production forest, woodland where no stumpage grow, forestation-suitable land; situation of scattered trees and trees planted by the side of farm house, the roads, rivers and fields) and so on. Meanwhile, this study analyzed the dynamics of forest resources and classified the forests by business divisions. The results show that the area of woodland account for 37.1% in the total area of land in the whole county; non-forest area account for 63%. Forested area accounted for 2.29% in woodland, open forest land is 0.19%, scrub growth is 20.32%, yong afforestation land is 53.0%, woodland where no stumpage grow is 1.71%, forestation-suitable land is 21.97%. The county’s forest coverage rate is 8.4%. The cumulation of highwood accounted for 43.8% in total volume of living forest in the whole county, open forest land is 0.79%, trees planted by the side of farm house, roads, rivers and fields is 51.7%, and scattered wood is 4%. The ratio of shelter forest and production forest is about 994:1 in woodland, open forest land and scrub growth. Plantation tree species followed by larch, Chinese pine, spruce, poplar, wild apricot, elm, apple trees, acacia, etc.. Shrub species were: sea buckthorn, caragana microphylla, shrubby falseindigo, mountain peach, lespedeza. By 2006, Forest coverage rate have increased to 8.4% from 6.1% in 1996, increased by 2.3%. The area ratio of Ecological forests and commercial forest is 3450:1 and the proportion have significantly increased.The main characteristics of forestry development is that the proportion of woodland is large and the space for development of forestry is wide; the proportion of forest area is very lower, but the proportion of shrubs is large; the proportion of large sapling forest, half-mature forest and Yong afforestation land is large, so there is still plenty of room for advancement in green percentage; because public welfare forests’area ratio is large, the ecologic niche is important; the project of conceding the land to forestry had been commendably carried out and much achievement had been got; the resource of sea buckthorn is very rich, forestry characteristic economy have a lot of potential; much resources are unevenly distributed, there are regional.更多还原