不同林龄橡胶林的滞尘能力研究

Study on Dust Retention of Rubber Plantation at Different Ages of Stand

通过取样洗脱测定滞留在叶片上的粉尘量,对3个不同林龄阶段的橡胶林滞尘能力进行研究,分析林龄、叶面积、季节和累积天数等因素对滞尘量的影响。结果表明:不同林龄的橡胶林对空气中的粉尘颗粒物均具有显著的阻挡、截留与吸滞作用,单株橡胶树滞尘量为0.0025~0.1171 kg/株,单位面积橡胶林滞尘量为1.1394~39.7919 kg/hm^(2)。橡胶林的滞尘量与林龄、叶面积和季节显著相关,而与取样间隔天数无明显相关性,表现为:老林的滞尘量通常高于中龄林和幼林,雨季滞尘量明显低于旱季和雾凉季,而滞尘总量不会随天数的增加而不断累积增多。

The dust retention of three rubber plantations at different ages of stand was investigated by sampling and elution to determine the amount of dust retained on leaves.And the effects of age of stand,leaf area,seasons and retention days were analyzed.The results showed that all the rubber plantations at different ages of stand had significant blocking,intercepting and absorbing effects on air dust particles.The dust retention of per rubber tree and per unit area of stand was 0.0025~0.1171 kg/plant and 1.1394~39.7919 kg/hm^(2),respectively.The dust retention was significantly correlated with age of stand,leaf area and season,but not with retention days.The dust retention of old rubber trees is usually higher than that of middle and young rubber trees.The dust retention in rainy season was obviously lower than that in dry season and fog cool season.The amount of dust retention would not keep accumulating with the increase of days.