Study On Theory And Technology Of Forest Ecological Harvesting Planning At Landscape Level In Northeast Over-cutting Forest Area

Theory and technology of landscape-level forest ecological harvesting are studied in Jingoulin forest farm, where it is located in Wangqing forestry bureau of Jilin province. The main studied theories and methods include spot sampling, RS & GIS technology application, TWINSPAN landscape classification, DCA landscape succession and ordination, environment factors CCA correlation analysis, landscape pattern analysis, landscape spatial trend surface analysis, landscape development model simulation, landscape planning, etc. The main conclusions are as follows:In theory:(1)Forest ecological harvesting involves landscape and stand levels. At stand level, some related to stand, such as forest volume, trees species, trees groups and its arrangement, trees DBH class, biodiversity optimization combination and forest-land productivity, nutrient, water, exchange process of matter and energy, should be taken into account in order to keep forest ecosystem structure and function, to maintain ecosystem stability and sustainability, to reflect the harmony between nature, society, environment and human eco-society development. At landscape level, the harvesting process should simulate nature landscape character。According to forest community succession ordination and the correlation between them,ecological harvesting at stand level would be implement with landscape-level planning and guidance for maintaining forest landscape integration by stand-level forest logging and regeneration to accelerate community succession.(2)Quantitative classification and ordination of forest landscape can be applied by TWINSPAN and DCA. The two methods are useful tools in landscape ecology quantitative classification.(3)By close-to-nature WET designed, stand management can be realized within landcape controling. Community site mapping is their"ligament"of top-down managemnet...