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首页> 外文期刊>The Kasetsart Journal >Status of Cu, Zn, B and Mo in Agricultural Soils of Western Ethiopia: Laboratory Assessment
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Status of Cu, Zn, B and Mo in Agricultural Soils of Western Ethiopia: Laboratory Assessment

机译：埃塞俄比亚西部农业土壤中铜，锌，硼和钼的状况：实验室评估

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摘要

One hundred and sixty soil samples of Nitisols of Western Ethiopia were collected following three elevational positions and two fanning practices. The objectives of the study were to assess the status of copper, zinc, boron and molybdenum in the soils and to examine effects of altitude and farming practices on status of the nutrients. The status of copper and zinc were determined by diethylene triamine pentaacetic acid-triethanolamine (DTPA-TEA), ammonium bicarbonate diethylene triamine pentaacetic acid (AB-DTPA) and Mehlich-III methods using atomic absorption spectrophotometer. Boron was analyzed by hot water extraction method and molybdenum by ammonium acetate EDTA extraction method using spectrophotometer. The contents of extractable copper were in the sufficient ranges by DTPA-TEA and AB-DTPA methods. However, by Mehlich-III method the amounts of extractable copper of 18, 3.6 and 1.8% of the samples were below the critical level in low, mid and high altitudes, respectively. The contents of extractable Zn were all in the deficient ranges in low and mid altitudes by DTPA-TEA and Mehlich-III methods. However, by AB-DTPA method, the contents of 72 and 51 % of the samples were below critical level in low and mid altitudes, respectively. The contents of extractable Zn were in the deficient range in high altitude by 73, 9 and 71% of the samples using DTPA-TEA, AB-DTPA and Mehlich-III, respectively. The contents of extractable boron in 30, 38 and 27% of the samples and the contents of molybdenum in 6, 2 and 6% of the samples were in the deficient range in low, mid and high altitudes, respectively. The contents of copper were higher in traditional farms than in intensive farms in low altitude, while the contents were mostly higher in intensive farms than in traditional farms in mid and high altitudes. The amounts of extractable zinc were higher in intensive farms than traditional farms. The values of extractable boron and extractable molybdenum mostly were higher in traditional farms than in intensive farms in all altitudes. The amounts of copper and zinc by Mehlich-III and AB-DTPA methods increased with increase in altitudes. Boron and molybdenum did not show consistency in the effects of altitudes.
机译：在三个高程位置和两个扇形练习之后，收集了埃塞俄比亚西部尼采醇的160个土壤样品。该研究的目的是评估土壤中铜，锌，硼和钼的状况，并研究海拔和耕作方式对养分状况的影响。铜和锌的状态通过原子吸收分光光度计通过二亚乙基三胺五乙酸-三乙醇胺（DTPA-TEA），碳酸氢铵二亚乙基三胺五乙酸（AB-DTPA）和Mehlich-III方法测定。使用分光光度计，通过热水萃取法分析硼，通过醋酸铵EDTA萃取法分析钼。用DTPA-TEA法和AB-DTPA法可提取的铜含量在足够的范围内。但是，通过Mehlich-III方法，分别在低海拔，中海拔和高海拔地区，可提取铜的量分别为18％，3.6％和1.8％低于临界水平。 DTPA-TEA和Mehlich-III方法在低海拔和中海拔地区可提取的Zn含量均在不足的范围内。但是，通过AB-DTPA方法，在低海拔和中海拔地区，样品的含量分别为72％和51％低于临界水平。在高海拔地区，分别使用DTPA-TEA，AB-DTPA和Mehlich-III的样品中可提取的Zn含量在73％，9％和71％的不足范围内。在低海拔，中海拔和高海拔地区，样品中30％，38％和27％的可提取硼含量以及6％，2％和6％的钼含量均处于不足范围。传统农场的铜含量高于低海拔的集约化农场，而集约化农场的铜含量大多高于中高海拔的传统农场。集约化养殖场中锌的可提取量高于传统养殖场。在所有高度，传统农场的可提取硼和钼的含量均高于集约化农场。通过Mehlich-III和AB-DTPA方法获得的铜和锌含量随着海拔的升高而增加。硼和钼在海拔的影响上没有表现出一致性。

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