Effects of increasing supplementation rates of extruded distillers grains cubes
on stocker steer production grazing native range in Western Oklahoma
#MMPMID41384041
Grigsby Z
; Gunter SA
; Lalman D
; New M
; Worthington C
; Beck PA
Transl Anim Sci
2025[]; 9
(?): txaf128
PMID41384041
show ga
Our objectives were to determine the response curve of increasing supplementation
rate with extruded distillers' grains (DDG) cubes for animal performance,
supplement conversion ratio, and N excretion by steers grazing midgrass prairie
in western Oklahoma. A 2-yr trial was conducted at the Marvin Klemme Range
Research Station (Klemme) and the USDA-ARS Southern Plains Experimental Range
(SPER) in western Oklahoma. At Klemme, steers (Yr 1, n?=?133, BW?=?247?±?24.5?kg;
Yr 2, n?=?134, BW?=?264?±?29.1?kg) were allocated to 6 pastures in Yr 1 and 7
pastures in Yr 2 which were assigned to three daily supplementation rates of DDG
cubes: (i) Negative Control (NC)- no supplementation; (ii) Low supplement (LS) -
0.91?kg/steer and (iii) Medium Supplementation (MS) - 1.82?kg/steer. At Klemme,
steers were stocked at 2.0?ha/steer in yr 1 and 2.8?ha/steer in yr 2. At SPER
steers (n?=?119 each year; Yr 1, BW?=?295?±?28.8?kg; Yr 2, BW?=?294?±?25.7?kg)
were allocated to 12 pastures stocked at 2.0?ha/steer with pastures assigned to:
(i) NC; (ii) LS; (iii) MS and (iv) High Supplement-daily supplementation rate of
2.72?kg/steer. Data were analyzed by year and experimental site as a completely
randomized design. Least-squares means were separated using orthogonal polynomial
contrasts. In both years at Klemme, the increased supplementation rate linearly
increased (P???0.01) average daily gain (ADG) but made no difference (P???0.16)
in supplement conversion ratio. At SPER, ADG increased linearly (P?
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