兰州市郊园林绿化土壤改良培肥效果试验初报

针对兰州市绿化用土的盐分含量高、养分含量低且绿化用土不足的现状,以兰州市郊低山丘陵前沿台坪阶地黄绵土为研究对象,用小叶扶芳藤为指示植物,进行了7种土壤改良剂的培肥改良试验,测定了0~10、10~20和20~40cm土层土壤有机质、有效磷,速效钾,pH,电导率含量和小叶扶芳藤的成活率。结果表明:供试的7种改良剂均能不同程度提高土壤养分和小叶扶芳藤的成活率,在0~40cm土层,随着土壤深度的增加培肥效果呈下降的趋势,综合评定施用后的电导率、pH、有机质等指标,以处理7(羊粪+磷肥+尿素)的培肥效果最为显著。

Preliminary study on amendment effect of soil for horticulture in suburb of Lanzhou City

In order to resolve the soil problems of high salt content,low nutrients content for landscape greening in Lanzhou City,the treatments on improving terrace upper soil (0~10,10~20 and 20~40 cm)were carried out by using Euonymus fortunei var.radicans as the indicative plant and 7 soil amendments.The result showed that 7 soil amendments could improve the soil nutrition and the survival rate of Euonymus fortunei .A-long with the soil depth,the effect showed a decreasing trend.Treatment 7 (sheep dung+phosphate+urea) performed best based on the integrated evaluation with soil electric conductivity,pH value and organic matter content.