摘要
在我国施用稀土时间最长的黑龙江省花园农场 ,研究比较了施用稀土 1 2 a和不施稀土的对照处理上小麦和土壤中的稀土元素的分布、累积及运移 .结果表明 ,长期叶面喷施稀土并未造成耕层土壤和下部土层的稀土元素的累积 .成熟期小麦植株各部位的稀土元素含量顺序为根 >叶 >茎、壳 ;稀土元素主要累积在根部 ,其次是叶 ,茎和壳累积较少 .喷施处理小麦根部的稀土元素累积量高于对照 ,叶部也有此趋势 ,而茎、壳等部位差异不大 .根、茎、叶、壳稀土元素分布模式与土壤中相似 ,与施用的常乐稀土差别较大 ;
In this paper, the distribution,accumulation and translocation of rare earth elements(REEs) in soil and spring wheat are studied after foliage dressing with REEs for 12 years. The long term foliage dressing with REEs did not result in the accumulation of REEs in upper and lower soil layers. At maturing stage of spring wheat,the REEs content is in the order of root>leaf>stem and crust. Comparing with control, foliage dressing leads a higher accumulation of REEs in root, but no significant difference is found in stem and crust between these two treatments. The distribution patterns of REEs in root,stem,leaf and crust are similar to that in soil. Long term foliage dressing with REEs did not have an obvious effect on the REEs content of spring wheat grain.
出处
《应用生态学报》
CAS
CSCD
1997年第1期55-58,共4页
Chinese Journal of Applied Ecology
基金
国家自然科学基金重大资助项目
关键词
稀土元素
小麦
分布
累积
运移
土壤-植物系
Rare earth elements
Spring wheat
Distribution
Accumulation and translocation.
