Título:	Burial depths favor Italian ryegrass persistence in the soil seed bank.
Autoria:	CECHIN, J. SCHMITZ, M. F. HENCKS, J. R. VARGAS, A. A. M. VARGAS, L.
Afiliação:	JOANEI CECHIN, 1Universidade Federal de Pelotas – Depto. de Fitossanidade, Av. Eliseu Maciel, s/n – 96010-900 – Capão do Leão, RS – Brasil. MAICON FERNANDO SCHMITZ, 1Universidade Federal de Pelotas – Depto. de Fitossanidade, Av. Eliseu Maciel, s/n – 96010-900 – Capão do Leão, RS – Brasil. JONAS RODRIGO HENCKS, 2Universidade Estadual de Maringá – Depto. de Agronomia, Av. Colombo, 5790 – 87020-900 – Maringá, PR – Brasil. ANDRES ANTONIO MONGE VARGAS, 3Universidad de Costa Rica/Centro para Investigaciones en Granos y Semillas, Ciudad Universitaria Rodrigo Facio, Calle Costa Rica – 2060 - San José – Costa Rica. LEANDRO VARGAS, CNPT.
Ano de publicação:	2020
Referência:	Scientia Agrícola, v. 78, p. e20190078, 2020.
Conteúdo:	ABSTRACT: Italian ryegrass (Lolium multiflorum Lam.) is a weed broadly found in fields cultivated with wheat and barley crops. Seed inputs into the soil before harvesting winter crops increase seed bank, ensuring survival. This study evaluated the persistence of Italian ryegrass seeds subjected to burial depths over time. Experiments were carried out in the field for two years in randomized block experimental design with four repetitions. Dormant seeds harvested from mother-plants were put in nylon bags containing soil. Previously, seed viability was evaluated in a 1 % tetrazolium solution, and 50 viable seeds by repetition were buried at 0.5, 5.0, 10, and 20 cm depths. Seed persistence was evaluated by the percentage of deteriorated and remaining seeds, non-dormant seeds, abnormal seedlings, and viable and non-viable dormant seeds at 0, 30, 60, 90, 180, 360, 540, and 720 days after burial (DAB). Seed persistence increased at 10 and 20 cm of burial depth compared to seeds in the soil layers up to 5 cm. Moreover, burial depth at 10 and 20 cm showed lower percentage of deteriorated seeds (10 % lower) compared to 0.5 cm at 360 DAB. For non-dormant seeds, a higher percentage was found at 90 DAB, regardless of seed burial depth. Dormancy breakage occurred until 180 DAB, and more rapidly at 10 and 20 cm depths. At 540 DAB, more than 95 % of seeds were unviable, demonstrating short persistence of Italian ryegrass in the soil seed bank.
NAL Thesaurus:	Seed dormancy
Palavras-chave:	Lolium multiflorum Lam Seed bank weed management Seed longevity Soil seed bank inputs
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPT)