聊城市农田生态系统服务价值动态分析

Analysis of Farmland Ecosystem Service Value in Liaocheng City

根据聊城市统计年鉴等资料,利用市场价值法、替代法、影子价格法等方法,分析了聊城市2005-2015年农田生态系统服务价值的变化。结果表明:2005、2010、2015年聊城市农田服务价值总量为253. 7174×10^8、412. 1818×10^8、570. 3325×10^8元,持续增长。其中,直接服务价值分别占比52%、64%、65%,高于间接服务价值;粮食作物、蔬菜和食用菌的直接服务价值及间接服务价值中的释氧价值占比较高。2005-2010年,除经济作物的直接服务价值、废弃物处理价值外,各类服务价值都呈上升趋势;2010-2015年,由于农田种植面积减少,农田生态系统的直接服务价值增长放缓,固碳价值、气体净化价值、废弃物处理价值、涵养水源价值均呈下降趋势,但作物产量和农产品价格并没有下降,所以产品供给价值和社会保障价值仍在逐步增加。为了农田生态系统的可持续发展,必须统筹考虑农田生态系统的直接和间接服务价值。

Using data from the statistical yearbooks,the service value of farmland ecosystem of Liaocheng City was analyzed by using market value method,substitution method and shadow price method.The results were as follows.The total value of farmland services in Liaocheng in 2005,2010 and 2015 were253.7174×10^8,412.1818×10^8 and 570.3325×10^8 yuan,showing an upward trend.In which,the direct serevice value occupied 52%,64%and 65%respectively,and was higher than the indirect service value.The direct service value of food crops,vegetables and edible mushrooms and oxygen release value occupied higher proportions.In 2005-2010 years,in addition to the values of commercial crops and waste disposal,the value of other services were all on the rises.In 2010-2015 years,the increase of direct service values was slow because of the decrease of planting area,so the carbon sequestration,gas purification,waste disposal and water conservation decreased.But the crop yield and product price did not decline,so the values of product supply and social insurance still increased.For the sustainable development of farmland ecosystem,the direct and indirect values of farmland ecosystem must be considered as a whole.