生物炭及炭基肥对油麦菜生长及吸收重金属的影响

发布时间：2018-03-10 08:28

本文选题：生物炭　切入点：改良　出处：《中国环境科学》2016年10期 　论文类型：期刊论文

【摘要】：以水稻土和油麦菜为供试对象,通过盆栽试验研究了水稻秸秆生物炭和炭基肥对农田土壤物理化学性质,油麦菜生长及吸收Cd,Cu,Pb和Zn的影响.结果表明,稻杆炭及其炭基肥的施入可改善土壤理化性质,除铵态氮外各项指标均明显提高,油麦菜地上部生物量呈增加趋势.油麦菜各部位Cd,Cu,Pb和Zn的含量均随处理水平呈递减趋势,且根系茎叶,其中,高剂量炭基肥处理降低效果最佳,油麦菜茎叶Cd,Cu,Pb和Zn最高可分别降低34.78%、29.37%、46.59%和40.95%;油麦菜各部位对Cd,Cu,Pb和Zn的富集随处理水平呈递减趋势,而茎叶对Cd,Cu和Zn的转运系数呈增加趋势,稻秆炭及其炭基肥的施用均能显著减少油麦菜可食部位对Cd,Cu,Pb和Zn的吸收.
[Abstract]:The effects of rice straw biochar and carbon based fertilizer on the physical and chemical properties of farmland soil, growth and absorption of CD ~ (2 +) Cu ~ (2 +) Pb and Zn in cropland were studied by pot experiment. The physical and chemical properties of soil were improved by the application of rice straw carbon and carbon based fertilizer. The indexes except ammonium nitrogen were obviously increased, and the aboveground biomass of oatgrass showed an increasing trend. The contents of CD, Cu, Pb and Zn in different parts of oatgrass decreased with the treatment level. And the root stem and leaf, among them, the high dose carbon fertilizer treatment can reduce the best effect, the highest content of CD ~ (2 +) Cu ~ (2 +) Pb and Zn can reduce 34.78 ~ 29.37% and 40.95% respectively, the enrichment of CD ~ (2 +) Cu ~ (2 +) Pb and Zn in different parts of greasy vegetable is decreasing with the treatment level, and the content of CD ~ (2 +) ~ (2 +) Cu ~ (2 +) Pb and Zn is decreasing with the treatment level. However, the transport coefficients of Cu and Zn in culm and leaf increased, and the application of rice straw carbon and carbon fertilizer could significantly reduce the absorption of CD Cu Cu Pb and Zn in edible parts of oatmeal.
【作者单位】：环境保护部华南环境科学研究所;兰州大学资源环境学院西部环境教育部重点实验室甘肃省环境污染预警与控制重点实验室;
【基金】：国家自然科学基金项目(51178209,91025015,41501337) 中央高校基本科研业务费专项资金项目(lzujbky-2015-138,lzujbky-2015-214)
【分类号】：S636.9;X53

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