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陕西省森林生态效益动态预估

张岗岗,惠刚盈*,杨瑷铭   

  1. (中国林业科学研究院林业研究所, 国家林业局林木培育重点实验室, 北京 100091)
  • 出版日期:2019-04-10 发布日期:2019-04-10

Dynamic estimation of forest ecological benefits in Shaanxi Province.

ZHANG Gang-gang, HUI Gang-ying*, YANG Ai-ming   

  1. (Research Institute of Forestry,  Key Laboratory of Tree  Breeding and Cultivation of State Forestry Administration, Chinese Academy of Forestry, Beijing 100091, China).
  • Online:2019-04-10 Published:2019-04-10

摘要: 森林资源作为森林生态效益的载体,决定着其价值量的高低和服务功能的发挥。本文以第6次和第7次国家森林资源连续清查期间全国各省森林面积和蓄积及其森林生态效益的物质量和价值量为基础数据,构建并筛选出最优预估模型,并估算了第2~9次国家森林资源连续清查期间陕西省森林生态效益物质量和价值量动态变化。结果表明:y=aS+bV+c为物质量和价值量最优预估模型,陕西省森林生态效益各项功能的物质量均呈明显的上升趋势,其中积累营养物质和净化大气环境方面物质量增长尤为显著,第5次连续清查期间增长率较大,介于9.45%~30.35%;第2~9次连续清查期间森林生态效益总价值量依次为1979.66×108、2061.41×108、2064.46×108、2324.02×108、3085.11×108、2394.08×108(第6次连续清查实际值)、3510.69×108、3896.77×108、4069.95×108元·a-1,呈现逐年增加的趋势;陕西省各项森林生态功能中涵养水源和生物多样性保护所占总价值比重较大,分别介于40.52%~40.70%和23.08%~26.50%,其次是固碳释氧、保育土壤和净化大气环境,积累营养物质所占比重最小。该最优预估模型体现了森林资源本身特征与森林生态效益之间的协同关系,为有效估算陕西省森林生态效益物质量和价值量动态变化提供了简便可行途径,为促进生态GDP和生态补偿制度的实施提供了支撑。

关键词: 甘蔗, 组培苗, 变栖克雷伯氏菌DX120E, 促生效应

Abstract: As a carrier of ecological benefits, forest resources determine the value and services they provide. Based on forest area and forest volume, and the corresponding material quantity and values of forest ecological benefits of the 6th and 7th National Forest Inventory (NFI) in each province of China, we established an optimal prediction model of material quantity and values of forest ecological benefits, and applied this model to estimate the dynamics of material quantity and value of forest ecological benefits of the 2nd to 9th NFI in Shaanxi Province. The results showed that y=aS+bV+c was the optimal prediction model of the material quality and values of forest ecological benefits. The material quality of forest ecological functions in Shaanxi Province exhibited an obvious rising trend, especially in terms of nutrient accumulation and atmosphere environmental purification. The growth rate was high during the 5th NFI, between 9.45% and 30.35%. The simulated total values of forest ecological benefits in Shaanxi Province during the period from the 2nd to 9th NFI were 1979.66×108, 2061.41×108, 2064.46×108, 2324.02×108, 3085.11×108, 2394.08×108 (the actual value of 6th NFI), 3510.69×108, 3896.77×108,4069.95×108 yuan·a-1 respectively, showing an increasing trend. Among all forest ecological functions in Shaanxi Province, water conservation and biodiversity conservation accounted for a large proportion, which were 40.52%-40.70%, and 23.08%-26.50% respectively, followed by carbon sequestration and oxygen release, soil conservation, atmosphere purification, with the smallest proportion for nutrient accumulation. The optimal prediction model objectively reflected the synergy between forest ecological benefits and forest resources, providing an easy and feasible way to effectively estimate the dynamics of material quantity and values of forest ecological benefits in Shaanxi Province, and thus support for promoting the implementation of ecological GDP and ecological compensation system.

Key words: sugarcane, micropropagated plant, Klebsiella variicola DX120E, growth promoting effect.