Reduction of the Forage Seeds Physiological Quality by the Contact with Fertilizer in the Crop-Livestock Integration
Anne Caroline Dallabrida Avelino *
Department of Agronomy and Zootechny, Federal University of Mato Grosso, Cuiabá, Mato Grosso, Brazil.
Dayana Aparecida de Faria
Department of Agronomy and Zootechny, Federal University of Mato Grosso, Cuiabá, Mato Grosso, Brazil.
Carlos Eduardo Avelino Cabral
Department of Agricultural and Environmental Engineering, Institute of Agricultural Sciences and Technology, Federal University of Mato Grosso, Rondonópolis, Brazil.
Joadil Gonçalves de Abreu
Department of Agronomy and Zootechny, Federal University of Mato Grosso, Cuiabá, Mato Grosso, Brazil.
Elisangela Clarete Camili
Department of Agronomy and Zootechny, Federal University of Mato Grosso, Cuiabá, Mato Grosso, Brazil.
Alyce Raiana Monteiro dos Santos
Department of Agronomy and Zootechny, Federal University of Mato Grosso, Cuiabá, Mato Grosso, Brazil.
*Author to whom correspondence should be addressed.
Abstract
The aim of this study was to evaluate the effects of Brachiaria seed contact time with 05-25-15 fertilizer (N-P2O5-K2O) on the seed’s physiological quality. The experimental design was a completely randomized design with four replicates. Treatments were arranged in a 5x4 factorial, being: five seeds contact times with fertilizer (0, 24, 48, 72 and 96 hours); four forages: Marandu palisadegrass, Piatã palisadegrass, Xaraés palisadegrass and Ruziziensis grass. The performed tests were: water content, germination (first count and germination percentage), tetrazolium (viability), electrical conductivity, accelerated aging, sand emergency and emergence speed index. Contact time of 05-25-15 fertilizer with Brachiaria seeds reduces linearly: Germination, emergence and emergence speed index of Brachiaria seeds; Piatã and Xaraés palisadegrass seeds viability; vigor (electrical conductivity), except in Ruziziensis grass seeds; and seeds germination of Piatã palisadegrass submitted to accelerated aging test (vigor). Piatã palisadegrass is the least recommended, among the analyzed grasses, for intercropping in simultaneous sowing.
Keywords: Brachiaria, emergence, germination, grass, vigor