不同改良物质添加对滨海盐碱地土壤重金属及酶活性的影响  

Effects of Supplementation of Different Amendments on Soil Heavy Metals and Enzyme Activities in Coastal Saline Land

作　　者：解雪峰[1,2] 徐梓晴 田再洋 卜心国 徐飞 梁晶[5] 濮励杰 XIE Xue-feng;XU Zi-qing;TIAN Zai-yang;BU Xin-guo;XU Fei;LIANG Jing;PU Li-jie(College of Geography and Environmental Sciences,Zhejiang Normal University,Jinhua 321004,China;Key Laboratory of the Coastal Zone Exploitation and Protection of Ministry of Natural Resources,Nanjing 210023,China;Jiangsu Provincial Land Survey and Planning Institute,Nanjing 210017,China;Institute of Land and Urban-Rural Development,Zhejiang University of Finance&Economics,Hangzhou 310018,China;Shanghai Academy of Landscape Architecture Science and Planning,Shanghai 200232,China;School of Environmental Engineering,Nanjing Institute of Technology,Nanjing 211167,China;School of Geography and Ocean Science,Nanjing University,Nanjing 210023,China)

机构地区：[1]浙江师范大学地理与环境科学学院,金华321004 [2]自然资源部海岸带开发与保护重点实验室,南京210023 [3]江苏省土地勘测规划院,南京210017 [4]浙江财经大学土地与城乡发展研究院,杭州310018 [5]上海市园林科学规划研究院,上海200232 [6]南京工程学院环境工程学院,南京211167 [7]南京大学地理与海洋科学学院,南京210023

出　　处：《环境科学》2023年第10期5649-5656,共8页Environmental Science

基　　金：国家自然科学基金项目(42101068,42171245,41701618);江苏省海洋科技创新项目(JSZRHYKJ202212);浙江省自然科学基金项目(LQ21D010007,LY21D010008);海岸带开发与保护重点实验室开放课题项目(2021CZEPK01)。

摘　　要：改良物质添加在改善土壤理化性质的同时也可能会导致土壤重金属累积.实验设置了对照(CK)、有机肥(OM)、聚丙烯酰胺+有机肥(PAM+OM)、秸秆覆盖+有机肥(SM+OM)、秸秆深埋+有机肥(BS+OM)和生物菌肥+有机肥(BM+OM)共6个处理方式,研究不同改良物质添加对滨海盐碱地土壤重金属和土壤酶活性的影响,以及二者之间的关系.结果表明,与CK处理相比,不同处理下土壤Cr、Cu、Ni和Pb含量呈现上升趋势,其中SM+OM和PAM+OM处理分别对Cr和Cu含量的影响最为显著,而BM+OM处理对Ni和Pb含量影响最为显著.与CK处理相比,改良物质添加后土壤蔗糖酶和脲酶活性显著上升,其中BM+OM处理效果最好;碱性磷酸酶活性呈现上升趋势,但上升程度较小;过氧化氢酶活性无显著变化.冗余分析表明前两轴累积可解释酶活性变异特征的70.3%,单一重金属对土壤酶活性影响的重要性大小依次为:Ni>Cu>Cr>Pb.The supplementation of soil amendments may not only improve the soil physical and chemical properties but also lead to the accumulation of heavy metals in soil.This experiment included six treatments:control(CK),organic manure(OM),polyacrylamide+organic manure(PAM+OM),straw mulching+organic manure(SM+OM),buried straw+organic manure(BS+OM),and bio-organic manure+organic manure(BM+OM)to explore the effects of different soil amendments on heavy metals and soil enzyme activities in coastal saline land and the relationship between them.The results revealed that compared with that in the CK treatment,the contents of soil Cr,Cu,Ni,and Pb exhibited an upward trend after the supplementation of soil amendments,among which the SM+OM and PAM+OM treatments had the most significant effects on the contents of soil Cr and Cu,respectively,whereas the BM+OM treatment had the most significant effects on the contents of soil Ni and Pb.Compared with those in the CK treatment,the activities of soil invertase and urease increased significantly following supplementation of soil amendments,and the BM+OM treatment had the best effect.The alkaline phosphatase activity exhibited a slightly upward trend after the supplementation of soil amendments,whereas the catalase activity did not change significantly.The redundancy analysis revealed that the first two axes cumulatively accounted for 70.3%of the variability in enzyme activities,and the importance of single soil heavy metals on soil enzyme activity was as follows:Ni>Cu>Cr>Pb.

关 键 词：滨海盐碱地 土壤改良剂 土壤重金属 土壤酶活性 冗余分析 

分 类 号：X171.1[环境科学与工程—环境科学]