| The forest is the main body of land ecosystem and ecology civilization construction. The forest resources’quantity, quality and its evolution process and result, can reflect a regional ecological condition and forestry construction effect. Used the resources inventory data about Liandu commonweal forest in the year of1999and2008to researches its present situation and resources dynamic change, and used the volume conversion factor method to estimate the area’s forest biomass, carbon storage and existing carbon density’s characteristics and dynamics, to make a thorough inquiry the exiting problems in the area’s commonweal forest construction and changes and provide the basis for the commonweal forest construction and management. The results show that:In2008, there are1.0285million mu commonweal forest, total volume of2.3168million cubic meters, and average unit volume of2.25cubic meters per mu in Liandu. The area’s commonweal forest are dominant with coniferous forest, many for a natural secondary forest, located in a lower altitude, given priority to the young, mainly in the whole higher canopy density, and the density as in low density primarily. Its distribution and structure is not rational, the unit stock is generally not high, the forest quality is different between towns, as well as between forests. So its distribution and structure needs to be further perfected.The area’s forest biomass is6.2589million ton, the unit biomass is91.28t/ha. Pine forest is highest in forest biomass, and Chinese Fir Plantation is highest in per unit biomass (98.09tons/acre). The area’s commonweal forest carbon storage is amounted to3.1295million ton and the average carbon density is45.64t/h. Though Liandu forest quality is not high, yet still at the forefront of Zhejiang province and Lishui. Considering the current commonweal forest is for from mature state, especially the unit biomass of broad-leaved forest and the needle and broad-leaved mixed forest still have quite large ascendant space, Liandu forest on carbon accumulation has great potential.After the ten years construction of public welfare forest, the construction of liandu area continues to optimize, the quality is increasing. The forest category are all the shelter forest after changing, Age of stand, near. mature.over maturity forest’s area and the commutation is increasing, shade density and degree closeness are also incasing, In the forest type, broad leaved forest and mixed broadleaf-conifer forest of public welfare forest in area are increasing quickly,coniferous forest’s area is decreasing relatively. Totally copulation from898.2thousand cubic meter to1329.5thousand cubic meter in1999of the525thousand acres public welfare forest, about increase431.2thousand cubic meter, every year growth rate is4.80percent. A unit accumulation from1.71cubic meter every acre in1999,increase to2.53cubic meter every acre in2008.According research, the public welfare forest’s overall quality in Lishui of Zhejiang province is in the front of the Liandu, but there are also several problems. Mainly there are too many coniferous forest, the quality of the mixed broadleaf-conifer forest and broad leaved forest are low level, the potential is unleash,lead to all the pubic welfare forest are mainly middle and infancy forest, the structure is unreasonable, the public welfare forest’s quality of every country. town, street is widely different. From dynamic change, the Liandu area’s public welfare forest’s profit is very obvious, it can be reference later. In the later public welfare forest’s construction, except capital construction, complete detect machine processed, should adjust coniferous forest in value ecological locality, during broad leaf’s increasing, should increasing the quality of broad leaved forest, in the foundation of distinguish public welfare forest’s forest resources and data accumulation, grasp the trend of the forest ecological system totally changing, lay the first stone for carrying out effective and feasible safeguard of the ecological environment. |
PDF Full Text Request