ACÚMULO DE MACRONUTRIENTES NA CULTURA DO SORGO GRANÍFERO NA SAFRINHA
DOI:
https://doi.org/10.18512/1980-6477/rbms.v15n2p294-304Keywords:
Sorghum bicolor, crescimentoAbstract
RESUMO - Este trabalho teve como objetivo determinar o acúmulo de matéria seca e macronutrientes nos diferentes estádios fenológicos da cultura do sorgo granífero no período da safrinha. Foi instalado um experimento em condições de campo com irrigação complementar em um latossolo vermelho distrófico no município de Janaúba, MG, utilizando o híbrido de sorgo granífero DKB 599. Utilizou-se o delineamento de blocos casualizados, com quatro repetições. Foram determinados a marcha de absorção de macronutrientes (N, P, K, Ca, Mg e S) e o acúmulo de matéria seca do caule, folhas, panícula e grãos de sorgo. O sorgo granífero (DKB 599), plantado na safrinha, alcança o máximo acúmulo de massa seca e macronutrientes N, P, K, Ca, Mg e S durante o estágio de grãos duros, final do ciclo. O acúmulo de macronutrientes na parte aérea de sorgo granífero na safrinha (DKB 599) tem a seguinte ordem decrescente: K > N > Ca > P > Mg > S.
Palavras-chave: Sorghum bicolor, crescimento, acúmulo, nutrientes, exportação.
MACRONUTRIENTS ACCUMULATION IN OFF-SEASON GRAIN SORGHUM
ABSTRACT – The present study aimed to determine the curves of accumulation of dry mass and macronutrients in grain sorghum in the off-season period. For this, a field experiment was installed in an Oxisol in the municipality of Janauba-MG using the grain sorghum hybrid DKB599. A randomized block design was used, with four replications to determine the course of macronutrient uptake (N, P, K, Ca, Mg and S ) and dry matter accumulation. in stems, leaves, panicle and grains. The off-season grain sorghum (DKB 599) reaches the maximum accumulation of dry mass and macronutrients during the stage of hard grains, the end of the cycle. The accumulation of macronutrients in the shoots presented the following descending order: K> N> Ca> P> Mg> S.
Key words: Sorghum bicolor, growth, accumulation, nutrients, export.
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