Morphogenesis of carpet grass in response to pig slurry fertilization/ Morfogenese da grama-tapete em resposta a adubacao com dejeto liquido de suinos

This study aimed to evaluate the morphogenesis of carpet grass fertilized for two years with pig slurry (PS). On the average of two years were applied 0, 51, 102, 153, 204 and 255[m.sup.3] of PS [ha.sup.-1], calculated to provide 0, 100, 200, 300, 400 and 500kg of N [ha.sup.-1] [year.sup.-1], respec...

Full description

Saved in:
Bibliographic Details
Published in:Ciência rural 2014-03, Vol.44 (3), p.461
Main Authors: Travi, Magdalena Reschke Lajus, Scheffer-Basso, Simone Meredith, Escosteguy, Pedro Alexandre Varella, Brustolin, Karen Doering, Zabot, Valdirene, Miranda, Mario
Format: Article
Language:Spanish
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This study aimed to evaluate the morphogenesis of carpet grass fertilized for two years with pig slurry (PS). On the average of two years were applied 0, 51, 102, 153, 204 and 255[m.sup.3] of PS [ha.sup.-1], calculated to provide 0, 100, 200, 300, 400 and 500kg of N [ha.sup.-1] [year.sup.-1], respectively. The morphogenesis was evaluated in the spring and summer of 2008-2009 and 2009-2010, considering 10°C as threshold temperature to evaluate the thermal sum in degree-days (DD) between the samplings. The fertilization linearly increased the tiller number, tiller elongation rate, leaf elongation rate and leaf area index. There was no effect of the fertilization on pseudoculm elongation rate (0.004cm [DD.sup.-1]), leaf appearance rate (0.004 leaf [tiller.sup.-1] [DD.sup.-1]) and phyllochron (274DD). Key words: Axonopus affinis Chase, leaf elongation rate, organic fertilization, phyllochron, tillers Este trabalho teve como objetivo avaliar a morfogenese da grama-tapete (Axonopus affinis) adubada durante dois anos com dejeto liquido de suinos (DLS). Na media de dois anos, foram aplicados 0, 51, 102, 153, 204 e 255[m.sup.3] de DLS [ha.sup.-1], calculados para prover 0, 100, 200, 300, 400 e 500kg de N/ha/ano, respetivamente. A morfogenese foi avaliada na primavera e verao de 2008-2009 e 2009-2010, considerando-se como temperatura basal 10°C para calculo da soma termica no intervalo entre as amostragens. Houve aumento linear no numero de perfilhos, taxa de alongamento de perfilhos, taxa de expansao foliar e indice de area foliar em funcao das doses de DLS. Nao houve efeito da adubacao na taxa de alongamento de pseudocolmo (0,004cm [GD.sup.-1]), taxa de aparecimento foliar (0,004 folha [perfilho.sup.-1] [GD.sup.-1]) e filocrono (274GD). Palavras-chave: Axonopus affinis Chase, adubacao organica, filocrono, perfilhos, taxa de expansao foliar
ISSN:0103-8478
1678-4596