This paper, probing into heavy metal control in domestic rubbish by source screening and nutrient element analysis, revealed the feasibility of source control of heavy metals and the suitability of rubbish as turfgras...This paper, probing into heavy metal control in domestic rubbish by source screening and nutrient element analysis, revealed the feasibility of source control of heavy metals and the suitability of rubbish as turfgrass medium. Heavy metals in domestic rubbish were controlled by source screening before composting. The study consisted of a control with garden soil. The contents of main mineral elements and heavy metals in rubbish compost and control were determined by the method of ICP-AES. The results showed that heavy metal concentrations in rubbish were lower than those in garden soil, and little difference occurred between rubbish and garden soil in main mineral element concentrations. Based on this, it was concluded that rubbish compost was favorable for using as turfgrass medium and heavy metal control in rubbish by source screening was effective.展开更多
文摘为研究不同发展演替阶段草坪生态系统结构和功能之间的相关关系,以狗牙根[Cynodon dactylon(L.)Persoon]、匍匐剪股颖(Agrostis stolonifera L.)、多年生黑麦草(Lolium perenne L.)、野牛草[Buchloe dactyloides(Nutt.)Engelm.]、高羊茅(Festuca elata Keng ex E. B. Alexeev)和白花三叶草(Trifolium repens L.)为研究对象,设置保持自然状态和人工去杂两种试验处理,调查其不同发展演替阶段植物物种多样性和生长量的变化。结果表明,不同发展演替阶段和不同试验处理中,草坪生态系统植物物种多样性和生长量之间的相关关系各异:初期,两者之间在6种草坪、2种试验处理中均呈线性正相关关系;中期,两者之间在保持自然状态试验处理中呈单峰曲线相关关系,在人工去杂试验处理中无明显相关关系;后期,两者之间在所有保持自然状态试验处理中呈单峰曲线相关关系,在50%的人工去杂试验处理中呈线性负相关关系,而剩下的50%则无明显相关关系。
基金NationalNaturalScienceFoundation (59878033)Tianjin Science and Technology Developm entProgram (043100611).
文摘This paper, probing into heavy metal control in domestic rubbish by source screening and nutrient element analysis, revealed the feasibility of source control of heavy metals and the suitability of rubbish as turfgrass medium. Heavy metals in domestic rubbish were controlled by source screening before composting. The study consisted of a control with garden soil. The contents of main mineral elements and heavy metals in rubbish compost and control were determined by the method of ICP-AES. The results showed that heavy metal concentrations in rubbish were lower than those in garden soil, and little difference occurred between rubbish and garden soil in main mineral element concentrations. Based on this, it was concluded that rubbish compost was favorable for using as turfgrass medium and heavy metal control in rubbish by source screening was effective.
