江苏洋口港临港工业区耐盐绿化树木引种试验

A experiment on the introduction of salt-tolerant tree species in Yangkou Harbor industrial area of Jiangsu

在对江苏洋口港临港工业区土壤盐分和pH值分析的基础上,引种了12种较耐盐乔灌木,3年后对其成活率、树高、地径等进行调查并对土壤的N、P、K及有机质含量进行分析。结果表明:合欢、旱柳、红花刺槐、紫穗槐4个树种在表层土(0～10 cm)含盐量为6.91‰的土壤上能正常生长,其中合欢第3年树高相对生长量为62.8%,红花刺槐第3年地径相对生长量为65.9%。‘中山杉302’在表层土(0～10 cm)含盐量为1.36‰,次表层土(10～20 cm)含盐量为3.18‰的土壤上成活率为100%。栽植耐盐树木对盐碱地的土壤养分都能起到一定的改善作用,其中豆科树种合欢对增加土壤养分效果最好。

Twelve species of salt-tolerant trees were introduced and planted in the Yangkou Harbor industrial area of Jiangsu based on the field sampling analysis of soil salinity and pH value.After three years growth,the survival rate,height and caliper of the tested trees were measured,the content of N,P,K and organic matter in the soil were investigated.The results showed that,Albizzia julibrissin,Salix matsudana,Robinia pseudoacacia f.decaisneana and Amorpha fruticosa could normally growth under 6.91‰ salt content of 0～10 cm topsoil.In third years,the tree height of Albizzia julibrissin could retain the relative growth rate at 62.8% and the caliper of Robinia pseudoacacia f.decaisneana could retain the relative growth rate at 65.9%.The survival rate of Taxodium ‘zhongshanshan 302’ was 100% under the 1.36‰ salt content in 0～10 cm soil layer and 3.18‰ salt content in 10～20 cm soil layer.Saline land could be improved to some extent by planting salt tolerant trees,especially Albizzia julibrissin.