不同比例珍珠岩对污泥堆肥理化性状与孔雀草生长的影响  

Effects of different perlite additions on physical and chemical properties of sewage sludge compost and growth of Tagetes patula

作　　者：胡雨彤[1,2] 时连辉[1,2,3] 刘登民[1,2] 仝少伟[1,2] 魏美艳[1,2] 孙杰[1,2] 

机构地区：[1]土肥资源高效利用国家工程实验室,山东泰安271018 [2]山东农业大学资源与环境学院,山东泰安271018 [3]山东省农业环境重点实验室,山东泰安271018

出　　处：《应用生态学报》2014年第7期1949-1954,共6页Chinese Journal of Applied Ecology

基　　金："十二五"国家"948"计划重点项目(2011-G30);国家科技支撑计划项目(2014BAL04B05);山东省优秀中青年科学家科研奖励基金项目(BS2010NY019);泰安市科技发展计划项目(20123064)资助

摘　　要：为解决污泥在替代泥炭应用时存在的透气性差等问题,用珍珠岩作为污泥透气性调节材料,以纯污泥堆肥为对照,研究添加珍珠岩20%、40%、60%、80%、100%(V/V)条件下混合基质理化性状的差异以及对孔雀草植株生长的影响.结果表明:混合基质的物理性状中容重、持水孔隙和水气比随珍珠岩比例的增大而降低,总孔隙度和通气孔隙则增加;化学性状中pH值随珍珠岩比例的增大而增加,EC值和养分含量则呈下降趋势;孔雀草地上部生物量以及开花数在添加60%珍珠岩条件下最高,纯污泥堆肥中最低;根系形态和根系活力在添加珍珠岩40%、60%、80%条件下较高.通气孔隙是影响最大根长和平均根直径的最强因子.珍珠岩主要是通过影响污泥堆肥物理性状来改善孔雀草生长,添加珍珠岩60%可显著改善污泥透气性差、盐分高的问题,对孔雀草根系及地上部生长等均有良好的调节作用.In order to resolve the problem of poor permeability of sewage sludge compost （SSC） which was used as the substitution of peat, perlite was used to regulate the permeability of the sew- age. The pure SSC was used as control. The proportions of perlite in the mixtures with SSC were 20%, 40%, 60%, 80% and 100% （V/V）, respectively. The effects of different perlite ratios on the physical and chemical properties and the growth of Tagetes patula were studied. The bulk densi- ty, water holding porosity and water holding porosity to aeration porosity decreased, but the total po- rosity and aeration porosity increased with the increasing addition of perlite to the SSC. For the chemical properties, the pH increased, and the EC and nutrient contents decreased with the in- creasing addition of perlite to the SSC. The aboveground biomass and flowers of T. patula were the highest in the 60% perlite treatment, and the lowest in the pure SSC treatment. The root morpholo- gy and activity were the best in the 40%, 60% and 80% perlite treatments. Aeration was the stron- gest factor to impact the maximum root length and average root diameter. Perlite promoted the growth of T. patula mainly through impacting the physical properties of the SSC. The addition of 60% perlite to the SSC could significantly improve the poor aeration and decrease the high salinity greatly in the SSC and regulate the growth of the root and aboveground of T. patula.

关 键 词：污泥堆肥 珍珠岩 理化性状 孔雀草 

分 类 号：S141.4[农业科学—肥料学] S681.9[农业科学—农业基础科学]