Assessing the Content of Micronutrients in Soils and Sugarcane in Different Pedogeological Contexts of Northeastern Brazil
Assessing the Content of Micronutrients in Soils and Sugarcane in Different Pedogeological Contexts of Northeastern Brazil
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DOI：
10.1590/18069657rbcs20180228
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发表时间：
2019-01-01
期刊：
影响因子：
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通讯作者：
Oliveira, Emídio Cantídio Almeida de
中科院分区：
文献类型：
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作者：
Silva, Rita de Cássia Ferreira da;Silva, Fernando Bruno Vieira da;Oliveira, Emídio Cantídio Almeida de
巴西东北部甘蔗的微量营养素研究很少，这方面的大部分工作可以追溯到70年代的S和80年代的S。本研究的目的是评估巴西东北部三种地质背景下甘蔗种植土壤中铁、锰、铜和锌的可用库和储备库，并诊断这些地区甘蔗的微量营养素营养状况，以确定可能存在微量营养素缺乏的土壤学条件。结果表明，在帕拉伊巴州和伯南布哥州种植甘蔗的土壤提供了与母质和土壤质地等级相关的有效和储备微量营养素含量。所有被分析的土壤样品中Fe、Mn、Zn和Cu的储量含量均低于该地区设定的背景值，表明微量营养素通过耕作持续输出。甘蔗诊断叶中锰、锌、铜含量的平均值和中位数均低于向巴西推荐的营养适宜范围，而铁含量达到作物营养需要。这是第一次使用这种基于土壤学背景的方法来研究巴西东北部土壤中可用和储备的微量营养素池。
Micronutrient research for sugarcane in northeastern Brazil is scarce and most works on this issue date back to the 70's and 80's. The objectives of this study were to assess the available and reserve pools of Fe, Mn, Cu, and Zn in soils cultivated with sugarcane under three geological contexts in northeastern Brazil as well as to diagnose the micronutrient nutritional status of sugarcane grown on these areas in order to identify pedogeological conditions in which micronutrient deficiencies are likely. Results showed that the soils cultivated with sugarcane in the states of Paraiba and Pernambuco posed available and reserve contents of micronutrients related to the parent materials and soil textural classes. The reserve contents of Fe, Mn, Zn, and Cu in all the soil samples analyzed were below the background values established for the region, which indicates a continuous exportation of micronutrients through cultivation. The mean and median contents of Mn, Zn, and Cu in diagnostic leaves of sugarcane were below their respective nutritional optimum ranges recommended to Brazil while Fe contents achieved the crop nutritional requirement. This is the first time such an approach based on pedogeological contexts is used to study the available and reserve pools of micronutrients in soils of Northeast Brazil.