Assessment Of Ecosystem Service Function Of Water Conservation Forest In The Northern Hebei Mountainous Area Of Luanping County

In order to solve the problem of water shortage in the mountainous areas of northern Hebei Province,Beijing and Hebei cooperated in the creation of water resources protection forest.To understand the role and effect of water resources protection forest in Beijing and Hebei as soon as possible,it is particularly urgent and important to study the ecosystem service value of the water resources protection forest in Beijing and Hebei.This research will further study,evaluate and analyze the ecosystem service value of water resources protection forest.In this study,Luanping Water Conservation Forest in Hebei Province was selected as the research object.Through field survey and laboratory experiments,a large amount of basic data was obtained.Combined with ecological theory,economic theory and energy theory,the monetary value of 5 ecosystem service values(water conservation,soil conservation,carbon sequestration and oxygen release,air purification and biodiversity conservation)of Luanping Water Conservation Forest were evaluated and analyzed from the aspects of afforestation model and site conditions.The results are as follows:The total energy value of ecosystem service of water conservation forest in Luanping County is 1.65E+19 sej,the energy value per unit area is 7.29E+14 sej/hm2,the total value is 6.92E+05 million yuan,and the value per unit area is 9.14E+01 million yuan/hm2.The value of each service is as follows:water conservation 3.48E+05 million yuan,accounting for 50.25%of the total value;air purification 1.50E+05 million yuan,accounting for 21.64%;biodiversity protection 1.23E+05 million yuan,accounting for 17.83%;soil conservation 5.47E+04 million yuan,accounting for 7.91%;carbon sequestration and oxygen release 1.64E+04 million yuan,accounting for 2.37%.The value of unit area is 4.59E+01 million yuan/hm2,1.98E+01 million yuan/hm2,1.63E+01 million yuan/hm2,7.23E+00 million yuan/hm2 and 2.1 7E+00 million yuan/hm2,respectively.The results show that the water conservation forest in Luanping County has great ecological benefits,among which water conservation and air purification services are the main service values of the water conservation forest ecosystem in Luanping County.From the analysis of different afforestation models,the unit area value of Pinus tabulaeformis forest land was the highest among the four afforestation models,reaching an average of 4.36E+0.02 million yuan per hectare,which was 32.15%,80.73%and 80.29%higher than the other three afforestation models respectively.The results showed that the afforestation model had a great influence on the ecosystem service value of water conservation forest in Luanping Coulty,and Pinus tabulaeformis forest could be the preferred choice for future creation of water conservation forest in Beijing and Hebei.The order of value per unit area is Pinus tabulaeformis>Platycladus orientalis>Platycladus orientalis+Apricot>Pinus tabulaeformis+Apricot.From the analysis of different site conditions,the value of unit area of sunny slope and shady slope,cinnamon soil and loam soil are almost the same.The value of unit area of sunny slope and shady slope are 8.73E+01 million yuan/hm2,9.15E+01 million yuan/hm2,8.37E+01 million yuan/hm2 and 8.40E+01 million yuan/hm2,respectively.The results showed that site conditions had little effect on the ecosystem service value of water conservation forest in Luanping County.The order of unit area value of two different slope directions was shady slope>sunny slope,and the order of two soil types was loam>cinnamon soil.