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不同气候区4种典型地带性植被土壤水文功能比较 总被引：5，自引：4，他引：1
以中国生态系统研究网络长期定位观测的西双版纳热带季节雨林、鼎湖山亚热带常绿阔叶林、哀牢山中山湿性常绿阔叶林和长白山阔叶红松林为基础,分析比较4种森林类型土壤水文功能的差异。研究结果表明:土壤容重随土层深度增加而增大,土壤孔隙度、有效含水范围、饱和含水量和月均含水量随土层深度增加而降低;鼎湖山地表径流量及其占总降雨量的比例最大,哀牢山蒸散量及其占总降雨量的比例最大;4种森林类型0~50 cm厚度土壤最大吸水能力为哀牢山>鼎湖山>长白山>西双版纳,蓄水量则为鼎湖山>长白山>哀牢山>西双版纳。 相似文献
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分析了休闲旅游业的形象产业属性与价值,探讨了长白山科学文化资源与旅游形象定位,对长白山休闲旅游地旅游形象的传播进行了研究,指出了长白山休闲旅游景区的导游产品及导游服务要成为长白山旅游形象的传播者,以此树立长白山国际休闲旅游名山的科学形象、文化形象、诚信友善的形象,获得满意体验的旅游者是旅游景区形象的最忠实的传播者。 相似文献
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在全国林业发展一、二级区划体系的指导下,依据吉林省林业实际进行了三级区划。吉林省林业发展共划分为10个三级区划区域,即:吉科尔沁沙地防风固沙、湿地保护区,吉科尔沁沙地东缘防风固沙综合治理区,吉中西部农田防护、果树林区,吉中部农田防护、观赏植物区,吉中部水土保持林区,松花江中上游水源涵养、风景林区,长白山西部水源涵养、珍贵用材林区,长白山东北部水源涵养、大径木培育林区,长白山自然资源保护区,吉南部水土保持、一般用材林区。区划反映出不同区域林业生态产品、物质产品和生态文化产品的生产力差异性,实现了林业生态功能和生产力的区域落实,对各区域中长期林业发展具有指导意义。 相似文献
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Tourism-induced deforestation outside Changbai Mountain Biosphere Reserve,northeast China 总被引：1，自引：0，他引：1
• Introduction
Old-growth forests on Changbai Mountain are economically and ecologically important but have been fragmented outside Changbai Mountain Biosphere Reserve. The trend of forest landscape degradation on Changbai Mountain threatens forest sustainability and biodiversity conservation in the region. Previous studies have focused mainly on the structure and function of protected forests but have ignored managed forests outside the reserve border. 相似文献5.
Effect of freezing-thawing on nitrogen mineralization in vegetation soils of four landscape zones of Changbai Mountain 总被引：1，自引：0，他引：1
• Introduction
We studied the effect of freezing-thawing on nitrogen (N) mineralization of four vegetation soils from typical vegetation zones of Changbai Mountain with a laboratory incubation experiment. The soils were treated with two levels of soil water content, representing the low and high soil water contents found during late autumn and early spring in Changbai Mountain, respectively, and underwent cycling of freezing at −5 or −25°C and thawing at 5°C up to 15 times. 相似文献6.
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长白山生态经济区是吉林省建设生态省所规划的四个省级生态经济区之一。生态经济区生态产业的发展,直接影响着生态省的建设。如何发挥长白山生态经济区的优势,将区域生态资源优势,转化为产业优势,寻求新的经济增长点,从而促进长白山生态经济区的经济发展和繁荣,是一个极具现实意义的课题。本文从长白山生态经济区生态资源状况、生态产业发展存在的问题出发,提出了长白山生态经济区发展生态产业的途径。 相似文献
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利用双指数模型预测中国不同森林带土壤有机碳矿化的动态变化 总被引：3，自引：0，他引：3
本文利用土壤培养实验和双指数模型(把土壤有机碳划分为活性碳和缓效性碳库)的方法,来分析确定长白山和祁连山的土壤有机碳的动态变化。分析和拟合土壤有机碳矿化释放的CO2的速率。结果表明:活性碳库占总有机碳的1.0%–8.5%,平均驻留时间的平均值为24天;缓效性碳库占总有机碳的91%–99%,平均驻留时间的平均值为179年。根据缓效性碳的大小和平均驻留时间可以得知,祁连山森林土壤的有机碳较长白山的难分解。通过分析影响森林土壤有机碳矿化的因素––土壤粘粒含量、海拔和温度,结果显示两种森林土壤有机碳的分解快慢与其温度正相关,并且长白山和祁连山的累积的土壤有机碳和缓效性碳的含量随土壤粘粒含量的增加而呈线性增加,其相关系数分别为0.7033和0.6575,充分表明温度和土壤粘粒含量对土壤有机碳的矿化有较大的影响。 相似文献
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WANGXian-cheng 《林业研究》2003,14(3):259-262
Changbai Mountain forest area is not only is a national timber base but also a green ecological defense for Songliao Plain of NE China. The Natural Forest Protection Project of this area has an important bearing on the social and economic sustainable development of Jilin Province or even the whole forest area in NE China. This paper summarized general conditions of natural forest in Changbai Mountain state-owned forest area and put forward six problems need to be urgently solved and five strategic suggestions on natural forest protection and sustainable management. 相似文献
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Genetic Differentiation of Pinus koraiensis under Different Altitude Conditions in Changbai Mountain
The genetic differentiation of Korean pine (Pinus koraiensis) in different altitudes in Changbai Mountain was analyzed by ISSR technique, and it was found that the level of genetic diversity of Korean pine reduces along with altitude increasing in Changbai Mountain. The variation of Korean pine is mainly from intra-population and there is a positive relativity between genetic distance and vertical geographic distance of Korean pine in different altitudes. The genedc coherence shows that altitude has less insulation to Korean pine. Therefore, it is deduced that the terrain formation of vertical distribution of Korean pine is a result of diffusion from lower altitude to higher altitude in the course of enlarging its adaptability. 相似文献
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中国国家公园准入标准研究述评——以9个国家公园体制试点区为例 总被引：4，自引：2，他引：2
国家公园属于全球保护地的一种,其最本质属性是公益性、国家主导性和科学性。以1974年IUCN对国家公园的定义为依据,将中国国家公园的准入标准概括为面积、资源级别、人类足迹指数和功能全面性4个方面,并据此建立指标体系。采用层次分析法确定各个层次指标的权重,然后运用模糊数学法对9个国家公园体制试点区进行综合评价,综合得分由高到低依次为青海三江源、黑龙江汤旺河、吉林长白山、湖北神农架、云南普达措、湖南南山、福建武夷山、浙江钱江源和北京八达岭国家公园。从结果来看,完全符合中国国家公园准入标准的试点区有青海三江源、吉林长白山和湖北神农架,即可以进入中国国家公园体系;黑龙江汤旺河虽然综合排名第2,但是资源级别不符合要求;云南普达措、湖南南山、福建武夷山、浙江钱江源和北京八达岭则是人类足迹指数未达标。 相似文献
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IntroductionUnderstanding the distribution patterns of biomassalong environmental gradients change from swampsthrough ecotones to forests is vital not only for revealing the law of ecotoneal community structure,function and succession, but also for conserving andmanaging ecotoneal communities. Research resultsshowed that conditions stressful in other environments might increase primary production in plantsadapted to wetland ecotones. For example, Sharmaand Gopal (1977) studied biomass structu… 相似文献
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In order to detect the effects of climate change on Erman's birch (Betula ermanii Charm.), we examined radial growth—climate relationships of Erman's birch forests at their upper limit of distribution in Changbai Mountain, Northeast China. Thirty Erman's birch trees from six stands were sampled at an elevation of about 1950 m a.s.l. Correlation and response function coefficients indicated that radial growth of Erman's birch was positively influenced by previous August, October and current February temperature, and previous winter, and current March, June and September precipitation. In addition, radial growth showed a negative relationship to previous August and current June sunshine ratio. Precipitation and temperatures in annualization periods also positively affected the radial growth of Erman's birch. Regression analyses indicated that precipitation explained more variation in radial growth than minimum temperature. Together, these results suggested that climate affected radial growth of Erman's birch through altering soil water availability. Therefore, the radial growth of Erman's birch at the tree line in Changbai Mountain could not be predicted by temperature alone even under a scenario of global warming. 相似文献