污水处理后的陶粒废料改良土壤的机理及农用效果  

Mechanism of soil amelioration by used sewage-treating ceramsite and its agricultural value

作　　者：罗沛聪[1,2,3] 谌建宇[1,3] 罗隽[1,3] 庞志华[1,3] 王振兴[1,3] 张燕[1,3] 

机构地区：[1]中国环境保护部华南环境科学研究所,广东广州510655 [2]华南农业大学资源环境学院,广东广州510642 [3]国家环境保护水环境模拟与污染控制重点实验室,广东广州510655

出　　处：《湖南农业大学学报（自然科学版）》2012年第2期198-202,共5页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：国际科技合作项目(2009DFA91780);国家水体污染控制与治理科技重大专项(2008ZX07211-004)

摘　　要：为探索陶粒废料的农业资源化处置途径,对污水处理后的陶粒废料进行电子显微镜(SEM)观察和X射线扫描(XRD)分析,并将陶粒废料(350 g)和土壤(1.2 kg)混合,用于华农2008糯玉米(T1处理)和珍甜1号甜玉米(T2处理)盆栽试验,与未施加陶粒废料的空白对照组CK1、CK2进行比较,对陶粒废料改良土壤的效果、原理及其对玉米生长的影响进行研究。结果表明:污水处理后的陶粒废料含有碱性物质,表面附着有一定量的磷酸钙水合物、三斜磷钙石和磷酸氢钙钠等含磷矿物;施加陶粒废料能显著提高土壤的pH值,显著增加有效磷和全磷含量,其中,T1处理土壤的有效磷含量比CK1提高27.9%,T2处理较CK2提高了27.3%;T1处理土壤的全磷含量较CK1提高了17.7%,T2处理的较CK2提高了14.3%;T1处理玉米的株高比CK1提高14.5%,茎粗增大16.2%,叶面积扩大75.9%,根长增长17.2%;T2处理玉米的株高比CK2提高23.6%,茎粗增大24.5%,叶面积扩大64.6%,根长增长24.1%,且更能促进植株的干物质积累。To explore the way of agricultural recycling,the used sewage-treating ceramsite was first observed by Scanning electron microscope（SEM） and X-ray diffraction（XRD） analysis.Then the ceramsite（350 g） was mixed with soil（1.2 kg） and applied on pot cultivation of two kinds of maize,referred as treatment T1 and T2,at the same time,the two kinds of maize cultivated without ceramsite were served as control group,namely,CK2 and CK2 to study the effect of ceramsite on soil amelioration and on growth of maize,and the underlying mechanisms were also explored.The results showed that after treating the sewage,alkaline substance was found in ceramsite and phosphorite was detected on the surface of ceramsite.Soil pH,available phosphorus and total phosphorus in soil were obviously enhanced.The available phosphorus and total phosphorus in T1 respectively increased 27.9% and 17.7%,compared to CK1,and those in T2 respectively increased 27.3% and 14.3%,compared to CK2.Maize growth under T1 and T2 treatments were all better than that under CK1 and CK2.Compared to CK1 and CK2,maize height increased 14.5% and 23.6%,stem diameter increased 16.2% and 24.5%,leaf area increased 75.9% and 64.6% and length of root increased 17.2% and 24.1% correspondingly in T1 and T2.In addition,accumulation of dry matter in the plant was also promoted in T1 and T2.These results suggest used sewage-treating ceramsite could be applied on soil amelioration,which would be an important and prosperous way for disposing the ceramsite after municipal sewage-treating.

关 键 词：陶粒废料 土壤改良 农用效果 玉米 

分 类 号：X705[环境科学与工程—环境工程]