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Nitric Acid as a Cold Extractor of Total Nutrient Contents from Mineral Fertilizers
Communications in Soil Science and Plant Analysis ( IF 1.8 ) Pub Date : 2021-07-21 , DOI: 10.1080/00103624.2021.1953055
Fabiane Carvalho Ballotin 1 , Wedisson Oliveira Santos 2 , Marcus Vinícius de Andrade Barros 1 , Edson Marcio Mattiello 1 , Adriana Correa Mendonça 1 , Rodrigo Coqui da Silva 3
Affiliation  

ABSTRACT

Chemical characterization of fertilizers, in terms of total nutrient content, is essential for quality control and definition of field-based rates. The Ministry of Agriculture, Livestock and Supply (MAPA) by IN/2007 recommends different methods for nutrient content extraction for fertilizers. These methods can have high analytical costs, be laborious, and generate large quantities of residues. Therefore, this work proposes a simple and more environmentally friendly extraction method by using nitric acid solution to extract total content of nutrients from fertilizers, which has the advantage of a cold extraction, less residue generation, and easier execution. The experiment was carried out using eight nutrient sources (tricalcium phosphate, monocalcium phosphate, potassium chloride, zinc oxide, copper oxide, manganese oxide, ulexite, and a mixture of soluble sources of these nutrients), four nitric acid concentrations (0.0, 1.0, 2.5, or 5.0 mol L−1), and six shaking times (10, 20, 30, 40, 50, or 60 min). A completely randomized design with three replicates was used. These data indicated 2.5 mol L−1 HNO3 as suitable concentration to extract total nutrient content from the sources. In addition, as there was no shaking time effect on elements extraction; in a second trial, we compared the performance of HNO3- at 2.5 mol L−1 under a shaking time of 60 min across MAPA methods. The results evidenced that soluble contents extracted by both methods were highly correlated, recovering equivalent amounts of B and K. For other nutrients, nitric acid method extracted a greater amount than MAPA method. Therefore, this paper represents a first approach to the use of a method based on nitric acid for the recovery of total nutrient contents (P, K, Ca Mg, S, B, Cu, Mn, and Zn) in mineral fertilizers of varying solubility.



中文翻译:

硝酸作为矿物肥料中总养分含量的冷提取剂

摘要

就总养分含量而言,肥料的化学特性对于质量控制和基于田间用量的定义至关重要。农业、畜牧业和供应部 (MAPA) 通过 IN/2007 推荐了不同的肥料养分提取方法。这些方法可能具有高分析成本、费力且产生大量残留物。因此,本工作提出了一种简单且更环保的提取方法,即使用硝酸溶液从肥料中提取总养分含量,具有冷提取、残留少、易于实施的优点。该实验使用八种营养源(磷酸三钙、磷酸一钙、氯化钾、氧化锌、氧化铜、氧化锰、ulexite、-1 ),以及六次摇动时间(10、20、30、40、50 或 60 分钟)。使用具有三个重复的完全随机设计。这些数据表明2.5 mol L -1 HNO 3是从来源中提取总营养成分的合适浓度。此外,由于没有振动时间对元素提取的影响;在第二次试验中,我们比较了 HNO 3 - 在 2.5 mol L -1MAPA 方法在 60 分钟的摇晃时间下。结果表明,两种方法提取的可溶性含量高度相关,回收等量的 B 和 K。对于其他营养素,硝酸法提取的量高于 MAPA 法。因此,本文代表了使用基于硝酸的方法回收不同溶解度矿物肥料中总养分含量(P、K、Ca、Mg、S、B、Cu、Mn 和 Zn)的第一种方法.

更新日期:2021-09-24
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