摘要
城市土壤pH值普遍偏高,已成为限制城市绿化发展的主要障碍因子之一,土壤酸碱缓冲性能是土壤质量评价的重要指标之一,也是预测和调控土壤pH值变化的定量依据。以城市搬迁地土壤为研究对象,探讨了静置时间、土壤类型和有机、无机改良材料对土壤缓冲性能的影响。通过酸碱滴定法绘制酸碱性能缓冲曲线,使用线性方程拟合计算样品酸碱缓冲容量。结果表明:土壤震荡混匀后的静置时间会显著影响土壤缓冲容量;灰潮土缓冲容量大于红壤和黄棕壤;无机材料改良后,灰潮土缓冲容量显著提高;湿垃圾沼渣堆肥缓冲容量大于草炭和绿化废弃物堆肥。湿垃圾沼渣堆肥可有效提高灰潮土缓冲容量,添加适宜比例为30%。研究可为城市搬迁地土壤的园林绿化应用提供技术支撑和指导。
The urban soil pH is generally high, and it has become one of the main obstacles to restrict urban greening. The soil acid-base buffering performance is one of the important indicators of soil quality assessment, and it is also a quantitative basis for predicting and regulating soil PH. Taking the soil from urban relocation as the research object. The effects of retention time, soil type, and organic, inorganic modified materials on soil buffering performance was studied. Titration curve method was used to investigate the acid base buffer capacity, separate titration curves were established by adding incremental amounts of either standardized hydrochloric acid or sodium hydroxide to soil suspended in deionized water, the calculated sample acid base buffer capacity is fitted with a linear equation. The results showed that the standing time after the soil shock and mixed, significant influence of soil buffering capacity;the cushioning capacity of the calcareous alluvial soil was greater than the red soil and yellow brown earth;After the calcareous alluvial soil was improved by inorganic modified materials, the soil buffer capacity was significantly improved;Blending capacity of the biogas residue compost is greater than peat and garden waste compost. The biogas residue compost can effectively improve the cooling capacity of the calcareous alluvial soil and add a suitable ratio of 30%. The study provides technical support and guidance for landscaping applications in urban relocation soil.
作者
马想
徐冰
梁晶
MA Xiang;XU Bing;LIANG Jing
出处
《园林》
2021年第12期24-31,共8页
Landscape Architecture Academic Journal
基金
上海市绿化和市容管理局科技攻关项目“湿垃圾处置固态餐余物资源化利用途径研究”(编号:G200202)
上海市绿化和市容管理局科技攻关项目“城市污染土壤生态修复关键技术研发与集成应用”(编号:G190202)。
关键词
城市搬迁地
灰潮土
湿垃圾沼渣堆肥
酸碱缓冲容量
city relocation site
gray tide
the food waste biogas residue compost
acid base buffer capacity
作者简介
马想,1992年生,男,湖北武汉人,硕士,上海市园林科学规划研究院、上海城市困难立地绿化工程技术研究中心、城市困难立地生态园林国家林草局重点实验室助理工程师,研究方向为城市土壤培肥与改良(上海200232);徐冰,1990年生,男,上海人,上海市园林科学规划研究院、上海城市困难立地绿化工程技术研究中心、城市困难立地生态园林国家林草局重点实验室助理工程师,研究方向为城市园林绿化土壤调查、评价与改良(上海200232);通信作者:梁晶,1981年生,女,山西人,博士,上海市园林科学规划研究院土壤研究所所长,上海城市困难立地绿化工程技术研究中心、城市困难立地生态园林国家林草局重点实验室教授级高级工程师,研究方向为城市土壤质量评价、修复及有机废弃物再利用(上海200232),E-mail:liangjing336@163.com。
