喀斯特中度石漠化地区不同生境小气候变化特征

Characteristics of Microclimate Change in Different Habitats of Karst Moderate Rocky Desertification Area

喀斯特中度石漠化地区小气候条件直接影响和限制石漠化地区植被恢复、演替的进程,为客观定量地认识中度石漠化区域不同生境小气候特点及差异,对典型中度石漠化区域开展实地小气候观测,统计分析不同生境光照强度、地表温度、土壤温度、土壤水分变化特征和差异。结果表明,石面小生境中光照强度、地表温度均最高,且日变化剧烈;石洞小生境中光照强度、地表温度、土壤温度均最低,土壤含水量最高,属于小气候最为极端的两种小生境。各小生境中乔灌草群落的光照强度、地表温度、土壤温度均明显低于藤刺灌草群落,表明乔灌草群落对于小气候具有明显的改善作用。

The microclimate conditions in different habitats of moderate rocky desertification directly affect or limit the rocky vegetation recovery and succession process, in order to objectively quantitative understanding characteristics and differences of microclimate in different habitats of moderate rocky desertification area. Based on the typical area the authors carried out field study of microelimate, and analyzed the effects of different habitats on light intensity, surface temperature, soil temperature and soil moisture. The result showed that light intensity and the surface temperatures were the highest in the stone surface microhabitat, and the day of rapid change The light intensity, surface temperature and soil temperature of the stone cave microhabitat were the lowest, the soil moisture was the highest, the stone surface and the stone cave belonged to two most extreme microclimate. The illumination intensity and surface temperature and soil temperature of arbor-shrub community were significantly lower than the shrub-grass community in different habitats. The result showed that the arbor-shrub community was of a significant improvement of mieroclimate.