摘要
[目的]研究不同柳条根系土壤对营养物质富集的影响，筛选出适宜工程施工的最佳植物材料。[方法]在现场岸坡扦插4种柳条（垂柳、杞柳、柽柳、馒头柳），比较不同植物材料对环境的适应性、根际土与非根际土养分指标及根际土对营养物质的富集作用。[结果]4种柳条成活率均在84％以上，垂柳的平均基径最大，而柽柳的枝条生物量最大、株高最高。比较根际土与非根际土养分指标可知，垂柳和馒头柳的根际土全氮含量高于非根际土；垂柳的根际土全磷含量高于非根际土；4种柳条根际土的有效磷含量均高于非根际土， pH均低于非根际土；垂柳、杞柳、柽柳的根际土有机质含量均高于非根际土。垂柳和馒头柳对土壤全氮有很高的富集效应；垂柳对土壤全磷有一定的富集作用；4种柳条均能有效地将有效磷富集在根际土中。[结论]可根据工程施工的要求，筛选不同柳条品种用于岸坡扦插。
Abstract
Objective] To study the effect of the rhizosphere soil of different varieties of cutting wickers on the enrichment of nutrients, and screen out the optimal plant materials for engineering construction.[Method] Cutting 4 kinds of wickers on slope(including Salix babylonica, Salix integra, Tamarix chinensis, Salix matsudana), the adaptability of different plant materials to environment,nutrient index of rhizosphere and non rhizosphere soil, enrichment of nutrients in rhizosphere soil were compared.[Result] The survival rates were above 84%of four vari-eties of wicker, the average base diameter of Salix babylonica was maximum, the branch biomass and plant height of Tamarix chinensis was maximum.The comparison of element content in rhizosphere soil and non-rhizosphere soil showed that the total nitrogen content of Salix baby-lonica and Salix matsudana in rhizosphere soil was lower than that of non-rhizosphere soil, and the total phosphorus content of Salix babylonica in rhizosphere soil was higher than that in non-rhizosphere soil.The available phosphorus content in rhizosphere soil of all 4 kinds of wickers was higher than that in non-rhizosphere soil, pH were lower than that of non-rhizosphere soil;the organic matter content in rhizosphere soil of Salix babylonica, Salix integra, Tamarix chinensis were higher than that in non-rhizosphere soil.Salix babylonica and Salix matsudana had highest enrichment effect on total nitrogen; Salix babylonica had a certain enrichment effect on total phosphorus; available phosphorus was ef-fectively enriched by rhizosphere soil of 4 kinds of wickers.[ Conclusion] According to the requirements of engineering construction, different wickers should be selected for slope cutting.
基金项目
国家“十二五”水专项---太湖新城湖滨流域水质改善与生态修复综合示范项目(2012ZX07101－013－5)
国家科技期刊平台
NSTL
维普
万方数据