Magnesium thermophosphates from the Maicuru complex as sources of P and Mg in maize production

IF 0.7 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY Pesquisa Agropecuaria Brasileira Pub Date : 2023-08-25 DOI:10.1590/s1678-3921.pab2023.v58.02892
C. Castro, M. Costa, R. F. Firmano, R. Guardani, George Silva
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Abstract

Abstract The objective of this work was to investigate changes in soil chemical characteristics, phosphorous concentrations in maize leaves, and the agronomic efficiency (AE) of magnesium thermophosphates produced from rocks of the Maicuru complex in the Brazilian Amazon Basin, in comparison with triple superphosphate (TSP). The thermophosphates consisted of a mixture of raw material from apatite, dunite, and quartz sandstone from Maicuru, aiming to adjust the contents of P, Mg, and Si. The mixture was melted, ground, and subjected to the analysis of solubility, chemical characteristics, and granulometry. The experiment consisted of two rates of dolomitic lime (0 and 2.4 Mg ha-1), three rates of P (20, 60, and 100 mg kg-1 soil), and four sources of P (TSP and three Mg thermophosphates), as well as of two control treatments, with and without lime. Three replicates were carried out per treatment in pots containing plants of the BR 5107 maize hybrid. Phosphorous concentration was determined in maize leaves at 45 days after sowing. The Mg thermophosphates showed a high AE and a higher neutralizing effect with the application of lime, which improved soil chemical characteristics and AE. The thermophosphates obtained from rocks of the Maicuru complex can be an alternative P fertilizer in maize production.
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麦库鲁复合体热磷酸镁作为玉米生产中磷和镁的来源
摘要:本研究旨在研究巴西亚马逊盆地Maicuru杂岩产热磷酸镁与三重过磷酸钾(TSP)的土壤化学特征、玉米叶片中磷浓度的变化以及热磷酸镁的农艺效率(AE)。热磷酸盐是由来自麦库鲁的磷灰石、白云石和石英砂岩的原料混合而成,目的是调整P、Mg和Si的含量。将混合物熔化、研磨,并对其溶解度、化学特性和粒度进行分析。试验包括2种白云石石灰(0和2.4 Mg ha-1)、3种磷(20、60和100 Mg kg-1土壤)、4种磷源(TSP和3 Mg热磷酸盐),以及2种对照处理(加石灰和不加石灰)。在br5107玉米杂交种盆栽中,每个处理进行3个重复。测定了播后45 d玉米叶片中磷的浓度。施用石灰后,热磷酸盐Mg表现出较高的声发射效应和中和效应,改善了土壤化学特性和声发射效应。从麦库鲁复合体的岩石中获得的热磷酸盐可以作为玉米生产的替代磷肥。
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来源期刊
Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuaria Brasileira 农林科学-农业综合
CiteScore
1.20
自引率
0.00%
发文量
45
审稿时长
9-18 weeks
期刊介绍: Pesquisa Agropecuária Brasileira – PAB – is issued monthly by Empresa Brasileira de Pesquisa Agropecuária – EMBRAPA, affiliated to Ministry of Agriculture, Livestock and Food Supply. PAB publishes original scientific-technological articles on Plant Physiology, Plant Pathology, Crop Science, Genetics, Soil Science, Food Technology and Animal Science. Its abbreviated title is Pesq. agropec. bras., and it should be used in bibliographies, footnotes, references and bibliographic strips.
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