铅污染及酸化的农田改良与利用研究  

Amelioration and Reutilization of Lead Contaminated and Acidified Farmland

作　　者：梅娟[1,2] 谢华[3] 阎秀兰[1] 李华[2] 廖晓勇[1] 

机构地区：[1]中国科学院地理科学与资源研究所,北京100101 [2]山西大学,太原030006 [3]广西壮族自治区环境保护科学研究院,南宁530022

出　　处：《农业环境科学学报》2014年第1期75-80,共6页Journal of Agro-Environment Science

基　　金：中央环境保护专项资金项目;国家863计划项目(2012AA06 A201)

摘　　要：研究石灰-氢氧化钠单施或与有机肥、蚕沙配施对铅污染及土壤酸化的农田改良效果及植物生长的影响。结果表明,各种改良处理可在一定程度上提高土壤的pH和有机质,促进植物生长。改良处理后种植甘蔗,其植株地上部Pb含量均有所下降,但甘蔗汁、蔗糖Pb含量均超过相关标准,具有较大的健康风险。与对照处理相比,各类改良处理可降低皇竹草地上部Pb含量的39%~88%,且均在《GB 13078—2001饲料卫生标准》限值内。由此可见,改良污染农田后,种植皇竹草具有较低的重金属健康风险,还可将其用作饲料以产生经济效益,因而是一种经济、安全且生态的治理模式。Exploring measures for ameliorating and reutilizing heavy metal contaminated soils attracts wide-ranging interest. A field experiment was conducted on farmland with lead contamination and soil acidification. Four treatments including lime-sodium hydroxide(LS), lime-sodium hydroxide and organic fertilizer(LSO), lime-sodium hydroxide and silkworm excrement(LSS)and control(CK)were used. To some extent, all amelioration treatments improved soil pH and organic matter, promoting plant growth. Amendments slightly decreased lead accumulation in the shoots of sugarcane. However, lead concentrations in the juice and sucrose exceeded the food health standards, posing a great healthy risk. Compared with the control, amelioration treatments reduced lead contents of hybrid giant napier(Pennisetum hydridum) by 39 to 88%, and plant lead concentrations were within the 'feed hygiene standards'(GB 13078—2001). These results suggest that heavy metal contaminated soils could be used to grow hybrid giant napier for feeds with lower health risks after being ameliorated.

关 键 词：铅 土壤酸化 改良 皇竹草 甘蔗 

分 类 号：X53[环境科学与工程—环境工程]