山西省公益林涵养水源与保育土壤效益评价

Benefit Evaluation of Water and Soil Conservation of Ecological Forests in Shanxi Province

基于2009年林保数据和山西省森林生态系统监测网络的高密度实测数据,应用水量平衡和替代工程等方法对山西省公益林的生态效益进行评估。结果表明,山西省公益林涵养水源、保育土壤的价值量分别为706.61×10~8元/a和335.93×10~8元/a,11个公益林树种对两者的贡献率分别为0.7%~35.9%和1.1%~31.5%.其中,油松、刺槐、辽东栎、杨树、落叶松的总贡献率分别为81.4%和82.4%,是维持山西省公益林主导功能的主要树种。基于高密度实测数据的评估结果高于以模拟数据为主的评估结果,说明以往评估结果及评估模型参数尚需进行进一步校正和修订。

The water and soil conservation benefit of ecological forests in Shanxi province was evaluated by using water bal- ance and shadow project method based on ecological forest investigation data in 2009 and high spatial density measured data from Shanxi province forest ecosystem monitoring network. The results showed that water conservation and soil conservation value of ecological forests in Shanxi province were 706.61 × 10-8 yuan and 335.93 ×10-8 yuan respectively, the value contri- bution rates of 11 ecological tree species were 0.7% -35.9% and 1.1% -31.5% respectively. The total value contribu- tion rates of Pinus tabulaeformis, Robinia pseudoacacia, Quercus liaotungensis, populous and Betula platyphylla were 81.4% and 82.4% respectively, which were the main tree species in dominant function of Shanxi province ecological for- est. The evaluation results based on the high spatial density measured data were higher than those mainly based on simula- tion data, which indicated that the previous evaluation results and evaluation model parameters needed to be further re- vised.