Desenvolvimento e produtividade de gergelim (cultivar k3) em latossolo amarelo em função da adubação potássica

Luciana Alves Martins; João Carlos de Souza Maia; Juliana Pires Basílio; Elisangela Clarete Camili; Suzana  Pereira de Melo

doi:10.1590/1983-21252024v3712504rc

Authors

Luciana Alves Martins Post Graduate Program in Tropical Agriculture, Universidade Federal de Mato Grosso, Cuiabá, MT, Brazil https://orcid.org/0000-0002-2975-9374
João Carlos de Souza Maia Department of Soils and Rural Engineering, Universidade Federal de Mato Grosso, Cuiabá, MT, Brazil https://orcid.org/0000-0001-6204-8112
Juliana Pires Basílio Post Graduate Program in Tropical Agriculture, Universidade Federal de Mato Grosso, Cuiabá, MT, Brazil https://orcid.org/0000-0002-4915-927X
Elisangela Clarete Camili Department of Plant Sciences and Plant Protection, Universidade Federal de Mato Grosso, Cuiabá, MT, Brazil https://orcid.org/0000-0002-4642-2511
Suzana Pereira de Melo Department of Soils and Rural Engineering, Universidade Federal de Mato Grosso, Barra do Garças, MT, Brazil https://orcid.org/0000-0003-2163-2376

DOI:

https://doi.org/10.1590/1983-21252024v3712504rc

Keywords:

Sesamum indicum L.. Fertilizer. Oilseed Production.

Abstract

Sesame (Sesamum indicum L.) is an oilseed crop species valued for its nutritional properties. Sesame production has been a strategic alternative for expanding agricultural diversification in Mato Grosso, Brazil. In this context, the objective of this study was to assess growth and seed yield of sesame plants (cultivar K3) grown in a Typic Hapludox soil under potassium (K) fertilizer application. The experiment was conducted in a randomized block design with four replications, using a 6×4 factorial arrangement consisting of six K₂O rates (0, 30, 50, 70, 90, and 120 kg ha^-1) and four application times (0, 20, 30, and 40 days after sowing). Agronomic parameters were evaluated, including plant height, first capsule height, numbers of branches and capsules per plant, capsule weight, 1000-seed weight, and seed yield. Soil samples were chemically analyzed after harvest. Individual factors (K₂O rates and application times) and the interaction between factors had no significant effects on plant height, first capsule height, number of branches per plant, and capsule and 1000-seed weights. The timing of fertilizer application did not significantly affect plant growth and seed yield. However, K fertilizer application increased soil K contents, number of capsules per plant, and seed yield. The highest seed yield was found for the K₂O rate of 90 kg ha^-1.

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