Title:	Growth stimulation of tropical grass (Megathyrsus maximus Jacq.) by humic substances and Herbaspirillum seropedicae.
Authors:	CANELLAS, L. P. CANELLAS, N. A. SILVA, R. M. NOVOTNY, E. H. OLIVARES, F. L.
Affiliation:	LUCIANO P. CANELLAS, UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE DARCY RIBEIRO; NATÁLIA A. CANELLAS, UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE DARCY RIBEIRO; RAKIELY M. SILVA, UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE DARCY RIBEIRO; ETELVINO HENRIQUE NOVOTNY, CNPS; FABIO L. OLIVARES, UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE DARCY RIBEIRO.
Date Issued:	2024
Citation:	Agronomy, v. 14, n. 9, 2006, 2024.
Description:	This study aimed to evaluate the effect of soluble humic substances and plant-growth-promoting bacteria on the vegetative growth of Mombaça grass. A greenhouse experiment was conducted to study the effects of foliar applications of humic substances (0, 12, 24, 48, and 96 mg C L−1) on the growth of Mombaça fifteen days after germination. After determining the optimal concentration range, a field trial was carried out in which humic substances at the best concentration were applied simultaneously with Herbaspirillum seropedicae strain UENF-H19 fifteen days after germination in three replicates. The best growth of Mombaça in the greenhouse was obtained with 48 mg C of the humic substance L−1, which promoted a shoot fresh weight 80% higher than in the control treatment. The increase was almost identical to that observed during the 50-week field experiment in plots treated with humic substances combined with H. seropedicae. The treated plants produced an 81% higher shoot fresh weight than the control, with no dry mass, nitrogen content, or crude protein change during the one-year evaluation period. Despite the efficiency of the selected microbial inoculants under controlled-environment experiments, the agronomical significance under field conditions remains a subject of debate and improvement. The present study demonstrates that combining Herbaspirillum seropedicae with humic substances (plural) could significantly increase pasture production under field conditions.
NAL Thesaurus:	Tropical grasslands
Keywords:	Biostimulants Plant-growth-promoting bacteria Sustainability
DOI:	https://doi.org/10.3390/agronomy14092006
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPS)