上海沿海防护林土壤理化性质分析

Analysis on soil physical and chemical properties of coastal protective forest in Shanghai

用常规方法调查了上海沿海防护林中具有代表性的7个林带:欧美杨、杂交柳、杜英、水杉、柳杉、池杉、东方杉林的林分基本特征,并对林下土壤进行了理化性质分析。研究结果表明:除杜英和东方杉林因林龄太小无法比较外,其他5种林分的生长快慢依次是:欧美杨、杂交柳、池杉、水杉、柳杉;由于树种不同、造林时间不等,7种林分对土壤的改良作用也不同,表现出林龄大的比林龄小的改良效果好,水杉林的土壤改良效果最好,欧美杨树林的土壤改良效果最差。

Soil physical and chemical properties were studied in stands of Populus euramericana,Salix matsudana var.umbraculifera × Salix babylonica,Elaeocarpus sylvestris,Metasequoia glyptostroboides,Cryptomeria fortunei,Taxodium ascendens.and Taxodium mucronatum ×Cryptomeria fortunei in Shanghai.The results showed that except Elaeocarpus sylvestris and Taxodium mucronatum ×Cryptomeria fortunei（too young to be compared）,the growth speed of the other five stands was in the order of Populus euramericanaSalix matsudana var umbraculifera×Salix babylonicaTaxodium ascendensMetasequoia glyptostroboidesCryptomeria fortunei.The improvements of tree species on soil properties were increased with the increase of tree ages.The soil properties in the Metasequoia glyptostroboides stand were significant better than those in the other stands,indicated that this tree species was good to the soil improvements.While the Populus euramericana was the worst in soil improvements.