EXTRATORES E DISPONIBILIDADE DE MICRONUTRIENTES EM TERRA PRETA DE ÍNDIO DA AMAZÔNIA CENTRAL
EXTRATORES E DISPONIBILIDADE DE MICRONUTRIENTES EM TERRA PRETA DE ÍNDIO DA AMAZÔNIA CENTRAL
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亚马逊中部黑土地区的微量营养素外加剂和分配
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
G. C. Martins
中科院分区：
文献类型：
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作者：
A. Moreira;W. G. Teixeira;G. C. Martins
本研究的目的是比较萃取剂溶液（Mehlich 1、Mehlich 3和DTPA-TEA），以评估在亚马逊河流域被称为Terra Preta do Indio （TPI）的分散斑块中具有较高肥力的亚马逊暗土（ADE）土壤中B、Cu、Fe、Mn和Zn的有效性。从10个考古遗址中采集了16个不同深度的样品，并使用了该地区5个具有代表性的土壤类别（Oxisol, Inceptsol, Ultisol， Entisol和Spodsol）。DTPA-TEA溶液可提取更多的Cu和Fe，而Mehlich 1溶液可提取更多的Mn和Zn。在气候条件下，Mehlich 1萃取剂的敏感性优于Mehlich 3和DTPA-TEA萃取剂。萃取剂之间的最佳系数为：Cu有效价（Mehlich 3和DTPA-TEA）、Fe有效价（Mehlich 1和DTPA-TEA）、Mn和Zn有效价（Mehlich 1和Mehlich 3）。在其他地区，使用较高、中等和较低的原始范围可能导致对ADE土壤中微量营养素有效性诊断的不正确解释。spodsoil的有效态B浓度高于其他土壤。
The objective of this work was to compare extractants solutions (Mehlich 1, Mehlich 3 and DTPA-TEA) evaluating the availability of B, Cu, Fe, Mn and Zn in Amazonian Dark Earth (ADE) soils with higher fertility occurring in scattered patches throughout the Amazon, called Terra Preta do Indio (TPI). Sixteen samples of different depths were taken from ten archeology sites, and five representative soil classes of the region (Oxisol, Inceptsol, Ultisol, Entisol and Spodsol) were used. The DTPA-TEA solution extracted more Cu and Fe available, while Mehlich 1 solution extracted more Mn and Zn. At the edaphoclimatic conditions studied, the Mehlich 1 extractant showed better sensibility than Mehlich 3 and DTPA-TEA extractants. The best coefficients between extractants were observed with: Cu available (Mehlich 3 and DTPA-TEA), Fe available (Mehlich 1 and DTPA-TEA), Mn and Zn available (Mehlich 1 and Mehlich 3). The use of ranges higher, middle and lower originary in others regions can lead to incorrect interpretation of diagnoses on availability of the micronutrients in ADE soils. The Spodsol showed higher concentration of available B than others soils studieds.