有机肥施用对土壤-萝卜体系中Cd迁移积累的影响
The Effect of Organic Fertilizer on Cadmium Accumulation and Migration in Soil-Radish Systems
马国泰 1关天霞 1王玉 2李彩霞2
作者信息
- 1. 河西学院生命科学与工程学院;甘肃省河西走廊特色资源利用重点实验室,甘肃 张掖 734000
- 2. 河西学院生命科学与工程学院
- 折叠
摘要
本研究采用盆栽试验,通过在施用不同浓度水平(0,15,30,45,60t/hm2)猪粪、鸡粪的条件下种植萝卜,分析元素镉(Cd)在土壤—萝卜体系中的迁移积累规律.结果表明,施用有机肥后Cd在土壤和萝卜中有积累现象.与对照相比,在60t/hm2处理下,猪粪和鸡粪处理中土壤全Cd含量分别增加7.23%、7.45%;施用猪粪时,萝卜根系在收获期Cd浓度增加明显,而施用鸡粪时,Cd浓度在叶片生长旺盛期增加明显.在相同处理条件下,随萝卜生长时间的延长,根系Cd浓度有降低的趋势,而茎叶部Cd浓度有增加的趋势.收获期时,在60t/hm2处理下,猪粪和鸡粪处理中叶部Cd含量分别比对照增加18.99%、5.79%.不同处理下,萝卜对Cd元素的富集系数最大值达到0.16,Cd元素从萝卜根部到叶部的转移系数最大值达到1.25.在该施肥范围内土壤中全Cd含量均未超过国家土壤环境质量标准,萝卜根中Cd含量也未超过食品安全国家标准.
Abstract
A pot experiment was conducted to investigate the migration and accumulation of cadmium(Cd)in the soil-rad-ish system by planting radish under different concentrations of fresh pig manure and chicken manure(0,15,30,45,and 60 t/hm2).The results showed that Cd accumulated in both the soil and radish after the application of organic fertilizers,with signifi-cant differences in Cd content between various dosages and the control group.Compared to the control,the total Cd content in-creased by 7.23%and 7.45%for pig manure and chicken manure,respectively,under the treatment of 60 t/hm2.The Cd concen-tration in the radish root system significantly increased at the harvest period,particularly when chicken manure was applied,al-though the Cd concentration also rose notably with pig manure.The Cd concentration in radish roots peaked during the vigorous leaf growth period.Under the same treatment conditions,as the growth time of radish extended,the Cd concentration in roots de-creased while that in leaves increased.Specifically,the Cd content in leaves increased by 18.99%and 5.79%with pig manure and chicken manure,respectively,under the 60 t/hm2 treatment.Across different treatments,the maximum concentration coeffi-cient of Cd in radish was 0.16,while the maximum value of the Cd transfer coefficient from root to leaf was 1.25.Importantly,the total Cd content in the soil did not exceed national standards for soil environmental quality,and the Cd content in the radish roots remained within the national food safety standards.
关键词
猪粪/鸡粪/土壤/萝卜/CdKey words
pig manure/chicken manure/soil/radish/cadmium引用本文复制引用
出版年
2024
NETL
NSTL
万方数据