Macro and Micro-Nutrient Accumulation and Partitioning in Soybean Affected by Water and Nitrogen Supply
Author:
Setubal Ingrid Silva1ORCID, Andrade Júnior Aderson Soares de2ORCID, Silva Silvestre Paulino da1, Rodrigues Artenisa Cerqueira1, Bonifácio Aurenívia3ORCID, Silva Evandro Henrique Figueiredo Moura da4, Vieira Paulo Fernando de Melo Jorge2, Miranda Rafael de Souza5ORCID, Cafaro La Menza Nicolas6ORCID, Souza Henrique Antunes de2ORCID
Affiliation:
1. Postgraduate Program in Agronomy, Agricultural Science Center, Federal University of Piauí, Teresina 64048-550, Brazil 2. Embrapa Mid North, Brazilian Agricultural Research Corporation, Teresina 64008-780, Brazil 3. Department of Biology, Center of Nature Science, Federal University of Piauí, Teresina 64600-000, Brazil 4. Luiz de Queiroz College of Agriculture, University of São Paulo, Piracicaba 13418-900, Brazil 5. Campus Profa. Cinobelina Elvas, Federal University of Piauí, Bom Jesus 64900-000, Brazil 6. West Central Research, Extension and Education Center, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
Abstract
This study aimed to investigate the influence of water availability and nitrogen fertilization on plant growth, nutrient dynamics, and variables related to soybean crop yield. Trials were performed in Teresina, Piauí, Brazil, using randomized blocks in a split-split plot arrangement. The plots corresponded to water regimes (full and deficient), the split plots to N fertilization (0 and 1000 kg ha−1 N-urea), and the split-split plots to harvest times of soybean plants (16, 23, 30, 37, 44, 58, 65, 79 and 86 days after emergence), with three replicates. In general, the accumulation and partitioning of nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), sulphur (S), copper (Cu), iron (Fe), manganese (Mn), zinc (Zn) and boron (B) were decreased in plants subjected to water deficit and without N fertilization. Although nitrogen fertilization promoted elevated N accumulation in tissues, it did not result in any significant yield gain, and the highest seed yields were found in plants under full irrigation, regardless of N supplementation. However, deficient irrigation decreased the seed oil content of N-fertilized plants. In conclusion, N fertilization is critical for nutrient homeostasis, and water availability impairs biomass and nutrient accumulation, thereby limiting soybean yield performance.
Funder
Brazilian Agricultural Research Corporation São Paulo Research Foundation Coordination for the Improvement of Higher Education Personnel—Finance
Subject
Plant Science,Ecology,Ecology, Evolution, Behavior and Systematics
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