原子吸收光谱法测定内蒙古典型草原长期施用有机肥对土壤锰组分影响  

Variation in Soil Mn Fractions as Affected by Long-Term Manure Amendment Using Atomic Absorption Spectrophotometer in a Typical Grassland of Inner Mongolia

作　　者：符明明[1] 姜勇[1] 白永飞[2] 张玉革[3] 徐柱文[1] 李波[1] 

机构地区：[1]中国科学院沈阳应用生态研究所,森林与土壤生态国家重点实验室,辽宁沈阳110164 [2]中国科学院植物研究所,植被与环境变化国家重点实验室,北京100093 [3]沈阳大学生物与环境工程学院,辽宁沈阳110044

出　　处：《光谱学与光谱分析》2012年第8期2238-2241,共4页Spectroscopy and Spectral Analysis

基　　金：国家(973计划)课题(2011CB403204)项目;国家自然科学基金项目(31000200)资助

摘　　要：采用改进的BCR连续提取,利用原子吸收光谱法测定了内蒙古草地施用羊粪试验11年后土壤中Mn组分。试验设置5个处理,分别施干羊粪0,50,250,750和1 500g.m-2.yr-1。结果表明,以四步加和法与强酸直接消煮法测定的全Mn含量作为回收率,各处理回收率为91.4%～105.9%,加标回收率为97.2%～102.9%。长期大量施有机肥可提高0～5cm土层植物可利用的交换态Mn含量47.89%,但还原态Mn和全Mn含量显著下降。施肥对0～5cm土层Mn形态影响大于5～10cm土层。研究结果对于土壤微量元素形态测定及草地养分管理具有一定的参考价值。The effect of sheep manure amendment on soil manganese fractions was conducted in a 11 year experiment at inner Mongolia grassland, using sequential extraction procedure in modified Community Bureau of Reference, and determined by atomic absorption spectrophotometer. Five treatments with dry sheep manure addition rate 0, 50, 250, 750, and 1 500g.m-2.yr-1, respectively, were carried out in this experiment. Results showed that the recovery rate for total Mn was 91.4% 105.9%, as the percentage recovered from the summation of the improved BCR results with aqua regia extractable contents, and it was 97.2%-102.9% from Certified Soil Reference Materials. Plant available exchangeable Mn could be enhanced by 47. 89%, but reducible and total Mn contents decreased significantly under heavy application of manure at depth of 0-5 cm. The effect of manure amendment on Mn fractions was greater in 0-5 cm than in 5- 10 cm soil layer. The results are benefit to micronutrient fractions determination and nutrient management in grassland soils.

关 键 词：原子吸收光谱 有机肥 土壤微量元素 锰 温带草原 

分 类 号：O657.3[理学—分析化学]