Broadcast application of ground silicate rocks as potassium sources for grain crops

Authors

  • Carlos Alexandre Costa Crusciol Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Ciências Agronômicas, Departamento de Produção Vegetal, Campus de Botucatu, Fazenda Experimental Lageado, CEP 18610-034 Botucatu, SP.
  • Rogério Peres Soratto Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Ciências Agronômicas, Departamento de Produção Vegetal, Campus de Botucatu, Fazenda Experimental Lageado, CEP 18610-034 Botucatu, SP.
  • Amanda Prado Gilabel Universidade Federal de Jataí, Unidade Acadêmica de Ciências Agrárias, Campus Jatobá, Cidade Universitária, BR 364, Km 195, no 3.800, CEP 75801-615 Jataí, GO.
  • Claudio Hideo Martins da Costa Universidade Federal de Jataí, Unidade Acadêmica de Ciências Agrárias, Campus Jatobá, Cidade Universitária, BR 364, Km 195, no 3.800, CEP 75801-615 Jataí, GO.
  • Murilo de Campos Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Ciências Agronômicas, Departamento de Produção Vegetal, Campus de Botucatu, Fazenda Experimental Lageado, CEP 18610-034 Botucatu, SP.
  • Gustavo Spadotti Amaral Castro Embrapa Territorial, Avenida Soldado Passarinho, n.º 303, Fazenda Jardim Chapadão, CEP 13070-115 Campinas, SP.
  • Jayme Ferrari Neto Universidade Católica Dom Bosco, Avenida Tamandaré, no 6.000, Jardim Seminário, CEP 79117-900 Campo Grande, MS.

Keywords:

agronomic efficiency, alternative fertilizer, phonolite, potassic fertilization, potassic rock, silicon

Abstract

The objective of this work was to evaluate the agronomic and economic efficiency of phonolite rock (K2) and alkaline potassium-silicate rock (K3), ground and applied by surface broadcasting, as K sources for the soybean (Glycine max), corn (Zea mays), common bean (Phaseolus vulgaris), and upland rice (Oryza sativa) crops. Four experiments – one with each crop – were conducted in two crop years in a Typic Haplorthox in a randomized complete block design with four replicates. The treatments consisted of three sources (the KCl standard source, K2, and K3) and four rates (0, 0.5, 1.0, and 2.0 times the recommended for each crop) of K. The three sources increased similarly the leaf K concentration of soybean, corn, and common bean but had no effect on that of upland rice. The grain yield of all crops increased with the application of K2 and K3, as observed for KCl. The efficiency of the alternative K sources varies depending on the rate and crop. The K3 source is viable to be applied by broadcasting at the recommended K rate for all studied crops, while K2 is suitable only for soybean, corn, and common bean.

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Published

2022-11-22

How to Cite

Crusciol, C. A. C., Soratto, R. P., Gilabel, A. P., Costa, C. H. M. da, Campos, M. de, Castro, G. S. A., & Ferrari Neto, J. (2022). Broadcast application of ground silicate rocks as potassium sources for grain crops. Pesquisa Agropecuaria Brasileira, 57(Z), e02443. Retrieved from https://apct.sede.embrapa.br/pab/article/view/27156

Issue

V.57, Jan./Dec., 2022 :Continuos publication

Section

THEMATIC NUMBER - REGIONAL AGROMINERALS