REPLACEMENT OF GRAZED FORAGE WITH WDGS AND POOR QUALITY HAY AND STRAW MIXTURES

A grazing study was conducted at the University of Nebraska Gudmundsen Sandhills Laboratory from mid-June to late-August across two years (2009 and 2010) to evaluate the effects of supplementation with mixtures of wet distillers grains (WDGS) and straw or hay on grazed forage intake. Twenty 1 ha paddocks replicated over two blocks were randomly assigned to one of four treatments: Control (CON) at the recommended stocking rate (1.68 AUM/ha in 2009 and 1.64 AUM/ha in 2010), and three double stocked treatments supplemented with 60% straw and 40% WDGS (STRAW), 60% hay and 40% WDGS (LOW), and 70% hay and 30% WDGS (HIGH). Forty yearling steers were stratified by BW and assigned randomly to treatment paddocks, giving a total of five steers per treatment. Five paddocks on each block were rotationally grazed for each treatment once during the experimental period. Post-grazing standing crop was determined by clipping five 0.25 m2 quadrats from each paddock at the end of the grazing period. Pre-graze forage allowance was calculated by adding an estimated amount of forage intake to the amount of forage remaining in the paddocks at the end of the grazing period. Forage intake was estimated by the difference between pre-graze and post-grazing forage availability. During the first year of the study, there was no difference in ADG between CON and HIGH; steers supplemented with 60:40 blends of straw or hay with WDGS presented higher ADG than the other two treatments. During the second year, steers in the STRAW treatment achieved significantly lower ADG than steers in the other treatments. Forage intake was significantly higher for the CON steers and intake of range forage was reduced by 18% to 22% when the animals were supplemented with the mixes. Mixing WDGS with low quality harvested forage to cattle grazing rangeland may be an alternative to increase or maintain stocking rates without hurting animal performance

Replacement of Grazed Forage with WDGS and Poor Quality Hay Mixtures

A grazing study was conducted at the Gudmundsen Sandhills Laboratory, Whitman, Neb., to evaluate the effects of mixtures of wet distillers grains (WDGS) and straw or hay on grazed forage intake. There was no difference in ADG between the control and 70% hay/30% WDGS; however, steers supplemented with 60:40 blends of straw or hay with WDGS had higher ADG than the other two treatments. Range forage intake was decreased by 44% to 54% when steers were supplemented with the mixes. Feeding a mixture of WDGS and low-quality harvested-forage to cattle grazing rangeland may allow increasing stocking rate without decreasing animal performance

Byproducts with Low Quality Forage to Grazing Cattle

Sixteen cows grazing smooth bromegrass pasture were unsupplemented or supplemented a 35:65 Synergy:straw mixture. Grazed forage intake was replaced about 50% with supplementation, with no differences in cow performance. In a second experiment conducted over two summers, yearling steers grazing native range were fed a mixture of 70:30 or 60:40 hay:WDGS or 60:40 straw:WDGS. During the first year, all steers fed byproduct-forage mixtures had greater ADG than control steers. During the second year, steers supplemented with byproduct-hay mixtures had similar gains as control while steers supplemented byproduct-straw mixtures gained less. Supplementing WDGS and low quality forage reduced forage intake by 17 to 22% in Experiment 2