摘要
对藻类、地衣、苔藓生物岩溶样品及相应岩石样品（ 相同成分、结构构造） 进行了室内蒸发失水、主动吸水试验，结果表明：与无生物覆盖的岩石相比，有藻类生物覆盖的岩石表面失水量、吸水量分别提高１８．８ 、１．６ 倍，蒸发失水、主动吸水的时间分别延长４８ ％ 、５７ ％ ，持水量提高１６．６ 倍；有地衣生物覆盖的岩石表面失水量、吸水量分别提高２．９、１９．１ 倍，蒸发失水、主动吸水的时间分别延长３１ ％ 、１１９％ ，持水量提高２ ．９ 倍；有苔藓生物覆盖的岩石表面失水量、吸水量分别提高８１．２ 、８．１ 倍，蒸发失水的时间延长６．１ 倍，主动吸水时间相同，持水量提高５７．２ 倍。生物在岩面的殖居、演化不仅改善了岩面的持水性能，而且生物循环的加入，促进了岩面碳循环速率，加速了下伏碳酸盐岩的溶蚀，富集了营养元素，为高等植物种子的萌发、生长提供了物质基础。
Indoor experiments on water holding by evaporation and active water absorbing for algae, lichen and moss are carried out. The results indicate that the amount, on an average, of loss and absorption of water for algae, lichen and moss biokarst samples increases 18.8 and 1.6 times, 2.9 and 19.1 times and 81.2 and 8.1 times, respectively,compared with relative fresh rock samples. The continuous times of active water absorbing prolong 48%and 57%, 31%and 119%and 610%and 0%, respectively. The amount of water holding improves 16.6 times, 2.9 times and 57.2 times, respectively. On account of the colonization of organisms on rock surface, not only the property of water holding of rock is improved, but also the addition of biological cycle accelerated the carbon cycle on rock surface and the rates of carbonate rock corrosion underneath algae, lichen and moss are enlarged. Moreover, the nutrient elements are accumulated. All these provide the material basis for the development of seeds of high plant.
出处
《地球化学》
CAS
CSCD
北大核心
1999年第3期248-256,共9页
Geochimica
基金
国家自然科学基金!(编号:49632100
49272160)
岩溶动力学开发研究实验室基金
