摘要
针对延边地区苹果梨主产区进行土壤稀土元素地球化学特征的研究,以便于进一步分析土壤与果品的相关关系,提高苹果梨的产量和品质。结果表明:龙井、三合、图们和珲春4个苹果梨主产区的土壤稀土元素的平均含量分别为169.13、227.4、159.59、130.91mg/kg;4个产区的(La/Sm)N的值皆远大于1,(Gd/Yb)N的值略大于1,δCe的值接近1,δEu的值小于1。除三合产区外,其他3个研究区的土壤稀土元素总量皆低于中国大陆土壤中稀土元素的含量186.8mg/kg;土壤中稀土元素的含量曲线基本保持一致,遵循奥多-哈金斯法则,呈对数分布;稀土元素中轻重稀土分馏明显,呈现轻稀土相对富集,Eu元素亏损;研究区内不同土壤类型中稀土元素含量不同,不同地质背景的土壤稀土元素分配具有差异,不同地貌单元的土壤稀土元素含量也不同。
The geochemical properties of the soils at the apple-pear production regions in Yanbian were studied to understand the relationship between soil and fruit quality. The results indicated that in the four apple-pear main production regions, i.e., Longjing, Sanhe, Tumen and Hunchun, the mean contents of soil rare-earth elements were 169.13 mg/kg, 227.45 mg/kg, 159.59 mg/kg and 130.91 mg/kg respectively. In the four production regions, the value of（La/Sm）N was higher than 1, the value of（Gd/Yb）N was slightly higher than 1, 6Ce value was near 1, 6Eu value was lower than 1 REE levels in all soil samples except those from Sanhe region were under the mean level 186.8 mg/kg of China Mainland. The content curves of REE followed the Oddo-Harkin rule strictly, presented the logarithmic distribution. LREE and HREE separate obviously, showing light REE enrichment and negative Eu anomaly, and REE level was affected mainly by the parent materials. There was some differences in REE content between the top and bottom of a slope, but the soil usage patterns produced little effect on REE distribution.
出处
《土壤》
CAS
CSCD
北大核心
2009年第3期413-419,共7页
Soils
基金
中国地质调查局和吉林省政府联合项目资助
关键词
延边
苹果梨产区
土壤
稀土元素
地球化学
Yanbian, Apple-peer production regions, Soils, REE, Geochemistry
