Selection of Sugar Cane Varieties with a Low Heavy Metal Accumulation Ability for the Ecological Remediation of Contaminated Farmland  

通过选种重金属低积累甘蔗品种实现污染农田的生态修复(英文)

作　　者：王学礼[1,2] 陈同斌[1] 雷梅[1] 宋波[1] 万小铭[1] 李艳梅[1] 

机构地区：[1]中国科学院地理科学与资源研究所环境修复中心,北京100101 [2]广西大学农学院,南宁530005

出　　处：《Journal of Resources and Ecology》2012年第4期373-378,共6页资源与生态学报（英文版）

基　　金：the National Natural Science Foundation of China (Grant No. 41071215);the National High Technology Research and Development Program of China (Grant No. 2012AA06A202)

摘　　要：How to best use farmland contaminated with low to moderate levels of heavy metals remains a challenge in many parts of the world. Here, we screened sugar cane varieties to identify those with a low ability to accumulate heavy metals and with high tolerance. These trials were conducted in arsenic （As）, lead （Pb） and Cadmium （Cd） contaminated farmland in Huanjiang County, Guangxi Zhuang Autonomous Region, China. We tested seven varieties and found that cultivar Guiyin9 had the highest cane stem yield （187.5t ha-1 ） and sugar content （27t ha-1 ）. The concentrations of As, Pb and Cd in the cane juice of Guiyin9 were all below the maximum limit for contaminants in food. Because Guiyin9 showed low accumulation of the heavy metals tested here and produced a high cane stem yield, this cultivar could be planted as a valuable crop in large areas of southern China contaminated with low to moderate levels of heavy metals.为探索重金属中低污染农田的生态、安全利用难题,在广西环江典型的砷、铅复合污染农田上开展了低积累高耐性甘蔗品种的筛选。研究发现:不同甘蔗品种的产量差别较大,桂引9号的蔗茎产量和含糖量在所有7个参试品种中表现最好的,分别达到了每公顷187.5 t 和27 t,比桂糖00-122高出127.0%和86.0%。同时该甘蔗品种蔗汁中的砷、铅含量均低于国标《食品中污染物限量》所规定的限值。因此,在重金属中低污染农田上种植桂引9号能获得较大的蔗茎产量和安全的农产品。这一研究结果将促进华南地区大面积的重金属中低污染农田的生态、安全利用。

关 键 词：sugar cane VARIETY SCREENING heavy metal contaminated farmland 

分 类 号：X53[环境科学与工程—环境工程]