Nutritive Values of Smooth Bromegrass, Meadow Bromegrass, and Meadow × Smooth Bromegrass Hybrids for Different Plant Parts and Growth Stages

Autor: Bruce Coulman, Yasas S. N. Ferdinandez
Rok vydání: 2001
Předmět:
Zdroj: Crop Science. 41:473-478
ISSN: 1435-0653
0011-183X
DOI: 10.2135/cropsci2001.412473x
Popis: Three hybrid populations between meadow bromegrass (Bromus riparius Rehm.) and smooth bromegrass (Bromus inermis Leyss) have been developed through hybridization and recurrent selection. The objective of this study was to determine the concentration of acid detergent fiber (ADF), neutral detergent fiber (NDF), and crude protein (CP) of leaf blades, stems, and whole-plant herbage of three hybrid bromegrass populations (S-9197, S-9073 and S-9183) and the two parental species at vegetative, heading, and anthesis stages of development. Generally, the highest leaf blade NDF, ADF, and lowest CP concentrations were observed in meadow bromegrass, regardless of the growth stage. For the stem fraction, hybrid S-9183 had the lowest ADF (240 g kg 1 ) and NDF (532 g kg -1 ) at the vegetative stage, At anthesis, in 1997, stem NDF concentrations of meadow bromegrass. S-9197. and S-9073 were similar, but lower than S-9183 and smooth bromegrass. At later stages of development, meadow bromegrass had higher stem CP concentrations (94-114 g kg -1 ) than other entries (62-110 g kg -1 ). For whole-plant samples. NDF (359-490 g kg -1 ) and ADF (178-214 g kg -1 ) concentrations of the three hybrid populations were consistently lower than the parental species at the vegetative stage of growth. The hybrid populations, particularly S-9183, were lower in NDF and ADF at early stages of maturity, suggesting that they have potential as high quatity forage species for grazing and hay prior to or at heading.
Databáze: OpenAIRE
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