辽西地区次生林植被恢复对局地小气候的影响

Effects of Secondary Forest Vegetation Restoration on Local Microclimate in Western Liaoning Area

[目的]研究次生林植被对地方小气候的影响，为研究长远气候生态农业走向良性循环提供理论依据。[方法]采用平行观测，对比分析方法，应用总辐射平衡、热量平衡原理，统计学原理分析次生林小气候特征。[结果]次生林植被太阳辐射利用率提高41．1％；减小湍流5％～6％。蒸发耗热增加了5％左右；降低蒸发量1．6mm／d，提高土壤湿度1．56％；相对减小径流量71％、减少泥沙量67．9％。[结论]恢复次生林植被，可以起到保水保土、降低风速、减少蒸发和风蚀的作用。在人为作用下逐渐恢复次生林、人工林可使小气候条件、生态农业朝着良性发展，对减轻扣缓解气象灾害具有深远的意义。

[ Objective] The paper aimed to study the effects of the secondary forest vegetation restoration on local mlcroelimate, provide theo- retical basis for the long-term climate of ecological agriculture tend to a virtuous circle. [ Methods] Secondary microclimate characteristics were analyzed by the way of parallel observation, comparative analysis methods, application of the total radiation balance, heat balance principle, and statistical principle. [ Results] Utilization of secondary forest vegetation increased 41.1% after the solar radiation; turbulence reduced 5% -6%, evaporative heat consumption increased about 5% ; evaporation reduced 1.6 mm/d, soil moisture increased 1.56% ; relative run- off decreased 71%, sand amount reduced 67.9%. [ Conclusion] Restoration of secondary forest vegetation played the role of preserving the water and soil, lowering wind speed, evaporation and wind erosion. Restore the secondary forest and plantations gradually by man will enable microclimate conditions towards to the sound development of ecological agriculture, which have farureaching significance to reduce and mitigate meteorological disasters.