污泥蚓粪对滩涂盐碱地土壤的培肥效应  

Responses of fertility development and sorghum growth in a mudflat saline soil to the amendment with sewage sludge-based vermicompost

作　　者：严漪云 左文刚[1] 徐凯达 王耀 赵怡琳 顾传辉 柏彦超[1] 单玉华[1] YAN Yiyun;ZUO Wengang;XU Kaida;WANG Yao;ZHAO Yilin;GU Chuanhui;BAI Yanchao;SHAN Yuhua(College of Environmental Science and Engineering,Yangzhou University,Yangzhou 225127,China;Department of Geological and Envimmental Sciences,Applachicm State University,Boone,North Carolina,28608,USA)

机构地区：[1]扬州大学环境科学与工程学院,江苏扬州225127 [2]阿巴拉契亚州立大学地质和环境科学系,美国北卡罗来纳布恩28608

出　　处：《扬州大学学报（农业与生命科学版）》2019年第3期111-116,共6页Journal of Yangzhou University：Agricultural and Life Science Edition

基　　金：国家自然科学基金资助项目(31872179、41828701);扬州大学研究生国际学术交流专项基金项目(2018-08)

摘　　要：在新围垦滩涂土壤上通过田间试验,研究不同用量污泥蚓粪(0、25、50、125、250t·hm^-2)对新围垦滩涂土壤理化性质的影响,并以高粱为指示作物研究污泥蚓粪的培肥效果。结果表明:施用污泥蚓粪各处理(25、50、125、250t·hm^-2)土壤有机质含量分别比对照增加42.4%、43.3%、112.6%、317.6%,土壤EC分别比对照降低7.6%、25.9%、39.5%、47.6%。施用污泥蚓粪可改善滩涂土壤结构,增加土壤中大于0.25mm水稳性团聚体,并降低土壤容重。污泥蚓粪可提高滩涂土壤全氮、碱解氮、全磷和速效磷含量;随污泥蚓粪用量的增加,高粱生物量、植株全氮、全磷含量显著增加。这一研究提示污泥蚓粪是一种有应用前景的滩涂土壤改良剂。Mudflat reclamation is an important approach to relieve the pressure from the arable land reduction.However,costal mudflat is usually characterized by high salinity,inferior structure and low fertility and its amendment needs large amount of organic matters.Using sorghum as indicator plant,field experiment with different application rates(0,25,50,125,250 t·hm^-2)of sewage sludge vermicompost(SSV)was conducted in a newly reclaimed mudflat to investigate the effect of SSV addition on physi-chemical properties of mudflat soil and sorghum growth.Results showed that compared with the treatment with no SSV applied,soil organic matters increased 42.4%,43.3%.112.6%,317.6%respectively in the treatments with(25,50,125,250t·hm^-2)SSV applied,and soil EC decreased 7.6%,25.9%,39.5%,47.6%.SSV application improved soil structure by reducing soil bulk density and increasing water stable aggregates.Total N,alkaline N,total P and available P were also elevated by SSV application.With the increase of SSV rate,the biomass,total N and total P of sorghum plant was significantly increased.Our result provides a reference for evaluating feasibility of using SSV as a mudflat soil modifier.

关 键 词：沿海滩涂 盐碱地 污泥蚓粪 土壤培肥 

分 类 号：S156[农业科学—土壤学] S510[农业科学—农业基础科学]