黑麦草和百慕大混合草坪草对南方典型红壤五毒元素的耐受能力和富集能力研究  

Tolerance and Enrichment Abilities of Ryegrass and Bermuda Mixed Turfgrass to Five Toxic Elements in Typical Red Soil Regions of South China

作　　者：张鸿燕 赖发英[2,3] 徐德胜 郭乃嘉 王频 何晋保 ZHANG Hongyan;LAI Faying;XU Desheng;GUO Naijia;WANG Pin;HE Jinbao(Agricultural Ecology and Resource Protection Agency of Jiangxi Province,Nanchang 330046,China;School of Land Resource and Environment,Jiangxi Agricultural University,Nanchang 330045,China;Key Laboratory of Poyang Lake Watershed Agricultural Resource and Ecology of Jiangxi Province,Nanchang 330045,China;Agricultural Ecology and Resource Protection Agency of Ganzhou City,Ganzhou,Jiangxi 341000,China)

机构地区：[1]江西省农业生态与资源保护站,江西南昌330046 [2]江西农业大学国土资源与环境学院,江西南昌330045 [3]江西省鄱阳湖流域农业资源与生态重点实验室,江西南昌330045 [4]江西省赣州市农业生态与资源保护站,江西赣州341000

出　　处：《生物灾害科学》2022年第4期448-455,共8页Biological Disaster Science

基　　金：2020年江西省农牧渔业科研课题和江西省自然科学青年基金项目(20202BAB L213024)。

摘　　要：【目的】研究黑麦草和矮生百慕大混合草坪草对五毒元素(Cd、As、Cr、Pb、Hg)含量较低的江西省某典型红壤中的耐受能力和富集能力。【方法】以黑麦草和矮生百慕大混合草坪草为对象进行田间试验,测定其生长状况和富集五毒元素含量。【结果】试验区草体生长状况良好,地上部分草体长度与土壤中五毒元素含量相关性不大。草体对Cd的富集能力最强,其次为As、Cr、Pb、Hg,在低Cd含量红壤中对Cd的平均富集系数达到1.156,平均转运系数达到0.923。Cd含量最高试验区的草体和附着土壤的Cd总量为2.353 mg/m^(2),其中根、茎叶和附着土壤的Cd含量占比分别为3.82%、7.86%、88.32%。【结论】混合草坪草对红壤中低含量Cd具有较高的耐受能力和富集能力,且移栽草坪富集的Cd以附着土壤中的Cd为主。[Objective]The field experiment was conducted to study the tolerance and enrichment abilities of ryegrass and dwarf bermuda mixed turfgrass to low-content five toxic elements(Cd,As,Cr,Pb,Hg)in a typical red soil region of Jiangxi Province.[Method]The ryegrass and dwarf bermuda mixed turfgrass was cultivated and the growth status and enrichment contents of 5 toxic elements were determined.[Results]The results showed that the grass grew well in each test area,and the length of overground part was not obviously related with the contents of five toxic elements in the soil.The mixed turfgrass had the strongest enrichment ability for Cd,followed by As,Cr,Pb,and Hg.In the red soil area with low content of Cd,the average bioconcentration factor and translocation factor for Cd were 1.156 and 0.923,respectively.In the experimental area with the highest content of Cd in soil,the total amount of Cd in grass and attached soil was 2.353 mg/m^(2),and the proportions of Cd in root,stem and leaves,attached soil were 3.82%,7.86%,and 88.32%,respectively.[Conclusion]The ryegrass and bermuda mixed turfgrass had relatively high tolerance and enrichment abilities for Cd in red soil.The Cd in transplanted lawn was mainly carried by attached soil.

关 键 词：草坪 CD污染 红壤 黑麦草 百慕大 

分 类 号：X172[环境科学与工程—环境科学]