Author: McKenna M. BrintonPublisher:
ISBN:
Category :
Languages : en
Pages : 166
Book Description
Evaluation of Alpha Amylase Containing Corn on Beef Cattle Performance and Digestibility and Double-cropped Annual Forages Following Corn Harvest
Author: McKenna M. BrintonEvaluation of Alpha Amylase Containing Corn on Finishing Cattle Performance and Digestibilty
Author: Melissa L. Jolly-BreithauptPublisher:
ISBN: 9780355868197
Category : Cattle
Languages : en
Pages : 0
Book Description
One digestion and four finishing trials were conducted to evaluate the effect of a new corn hybrid containing an alpha-amylase trait, Syngenta Enogen Feed Corn (SYT-EFC) on site and extent of digestion, ruminal fermentation parameters, and feedlot performance. Experiments utilized corn containing the enzymatic gene compared to controls, the near isoline parental corn (NEG) or commercially available corn grain (CON), processed as dry-rolled corn (DRC) or high moisture corn (HMC) in diets with dry [distillers grains plus solubles (DGS)] or wet (Sweet Bran) milling byproducts. The corn grain of the experimental diets were fed as the sole grain source, comprising 100% of the concentrate in the diet. Cattle fed SYT-EFC, processed as DRC with Sweet Bran had increased G:F resulting in feeding values ranging from 103 to 116% of CON or NEG. Steers fed SYT-EFC, processed as DRC with DGS had increased G:F resulting in feeding values ranging from 101 to 107% of CON or 105% of NEG. However, when processed as HMC, feeding SYT-EFC resulted in 96 and 102% that of NEG when fed with Sweet Bran or DGS, respectively. Marbling and 12th rib fat thickness data were mixed among trials with being increased in cattle fed SYT-EFC or observing no detectable difference among treatments. Cattle fed SYT-EFC had greater postruminal starch digestibility compared to NEG resulting in a 2.2 and 6.3% increase in total tract starch digestibility in DGS and Sweet Bran diets, respectively. Overall, feeding corn containing an alpha-amylase trait as DRC would suggest a slight improvement in feed efficiency.
Evaluation of Corn Condensed Distillers Solubles in Beef Cattle Diets and Grazing Double-cropped Forages Following Corn Harvest
Author: Benjamin H. HansenPublisher:
ISBN:
Category :
Languages : en
Pages : 119
Book Description
Corn condensed distillers solubles (CDS) is a protein and energy dense by-product from dry-milled production of ethanol. Recent oil extraction has posed modifications to the nutrient profile of CDS, suggesting that de-oiled CDS needs to be re-evaluated in beef cattle diets. Three experiments were conducted to evaluate the effects of CDS in high-concentrate diets, forage-based diets, as well as evaluate the effects of CDS on diet digestibility and rumen fermentation parameters in forage-based diets. Feeding CDS in high-concentrate diets up to 20% of the diet DM or in combination with wet distillers grains plus solubles (WDGS) improved performance and resulted in greater energy value compared to corn. Feeding values of 20% CDS or the combination of 16% CDS and 20% WDGS were 147 and 129% compared to corn, respectively. Feeding CDS in forage-based diets up to 40% of the diet DM diminished performance and resulted in a lesser energy value compared to corn. Linear decreases were observed in total tract digestibility of NDF and the acetate to propionate ratio in rumen fluid. Double-cropped forages following corn harvest offer livestock producers an opportunity to extend their grazing season on high quality forage in the fall. Additionally, crop producers may benefit from the implementation of grazing animals due to added soil nutrients and removal of residue. Therefore, an experiment was conducted to evaluate the effects of double-cropped oats following corn silage (CS) or high-moisture corn (HMC) on calf gains, forage production, and subsequent cash crop yields. Oats seeded after CS produced more forage biomass than oats seeded after HMC. Both treatments produced high quality oats (22% CP, 39% NDF, and 24% ADF averaged across treatments). Calf gains were greater grazing oats following CS compared to HMC at 1.10 and 0.84 kg / d, respectively. Across 1-yr of data, subsequent cash crop yields were not different for HMC and soybeans with increased CS yields in both covered/grazed and non-covered/non-grazed treatments compared to the covered/non-grazed treatment..
Evaluation of preharvest and postharvest factors on forage crop quality, physiology, and ensiling characteristics
Author: Siran WangPublisher: Frontiers Media SA
ISBN: 2832549578
Category : Science
Languages : en
Pages : 147
Book Description
Annual Meetings Abstracts
Author: American Society of AgronomyPublisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 464
Book Description
The Effects of Feeding Corn Containing an Alpha-amylase Gene on the Performance and Digestibility of Growing Cattle
Author: Marissa A. JohnsonPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Two growth performance studies and two digestibility trials were conducted to evaluate the effects of feeding Enogen feed Corn silage and corn grain to growing cattle. In Experiment 1, there were a total of four diets offered for ad libitum intake. The four diets consisted of two varieties of corn (Enogen Feed Corn (EFC) vs. negative isoline control corn (CON)) with two different methods of corn processing (dry-rolled corn (DRC) vs. whole-shelled corn (WC)) and were formulated to provide 1.13 Mcal NEg/kg DM. ADG and final BW tended to be greater for calves fed EFC (P 0.10). Feed efficiency was greater for calves fed EFC (P 0.01), improving by 5.50% over calves fed CON corn. In Experiment 2, a digestibility trial was conducted using 7 cannulated Holstein steers fed the same diets from Experiment 1. Ruminal pH was not affected by corn variety (P 0.82). Liquid passage rate was greater for CON-fed calves, which resulted in decreased digestibility. Total tract organic matter (OM) and dry matter (DM) digestibility was greater for EFC-fed calves (P 0.04). In Experiment 3, there were a total of four diets offered for ad libitum intake. Diets consisted of two varieties of corn silage (EFC vs. CON) and two varieties of DRC (EFC vs. CON) and were formulated to provide 1.11 Mcal NEg/kg DM. ADG was greater (P 0.01) for calves fed EFC silage and feed efficiency tended to be greater for calves fed EFC silage (P
Bibliography of Agriculture
Author: Evaluation of an Amylase-enabled Corn Silage in Lactating Cows
Author: Sergio Cueva WelchezPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
An experiment was conducted to investigate the effects of an amylase-enabled corn silage on the lactation performance, enteric gas emission and rumen fermentation of lactating dairy cows. The amylase-enabled corn hybrid (Enogen; Syngenta Seeds LLC) was harvested, ensiled, and included in the diet at 40% of dry matter (DM) of the cows. The Enogen corn silage (ECS) was compared with silage from a control (CON) isogenic corn hybrid without the amylase trait. Both silages were included at the same inclusion rate of dietary DM and the diet fed, with exception of the silage source, was identical between the treatments. The purpose of the experiment was to investigate the effect of ECS on lactational performance, enteric gas emission, and rumen fermentation of lactating dairy cows. Both corn hybrids were grown for approximately 130 d, and silages were fermented for approximately 220 d before the beginning of the animal experiment in April 2019. At harvest, the CON hybrid yielded approximated 1.1 t of DM/ha more than the ECS hybrid. Crude protein concentration was 6% lesser in ECS when compared with the CON hybrid. Acid detergent fiber was also 3.9% lesser for ECS. Furthermore, the ECS was greater in starch content, when compared with the CON (9.3%, on average). As expected, the amylase activity in ECS was 13-fold greater when compared with the CON silage. Nevertheless, the differences mentioned in the nutritional content of the silages, did not result in major differences in fermentation end-products between the silages. Inclusion of ECS at 40% dietary DM did not affect DMI but increased MY (40.8 vs 38.8 kg/d), improved feed efficiency (1.55 vs. 1.47 kg/kg) and tended to improve energy-corrected milk yield (ECM) feed efficiency in lactating cows (1.50 vs. 1.45 kg/kg). Milk lactose was greater (4.92 vs 4.86 %) for cows fed the ECS diet, relative to CON, but milk protein and fat contents were similar. Methane emission intensity (per unit of milk yield) was decreased by the ECS diet compared with CON; however, treatment did not affect CH4 emission intensity expressed per kilogram of ECM. Rumen fermentation, apart from a decreased molar proportion of butyrate in rumen fluid of ECS-fed cows, was not affected by treatment. Amylase activity was numerically, but not statistically, greater in rumen fluid of ECS-fed cows, however, the difference could be related both to a greater amylase activity in ECS (as previously described) and greater starch intake with the ECS diet, when compared with CON. As suspected, intake of starch was greater in cows fed the ECS diet relative to CON, and apparent total-tract DM digestibility also tended to be greater in cows fed the ECS. There were no differences in intakes in any of the other nutrients or their apparent total-tract digestibility. Nitrogen intake and utilization, as well as urinary purine derivative excretion, were not affected by the silage treatment. Effects induced by ECS were likely a result of the greater starch content in ECS and greater overall availability of digestible nutrients. Moreover, given that ECS decreased CH4 emission intensity (per unit of MY, but not of ECM), data would suggest that the carbon footprint of milk production could be reduced by inclusion of ECS, Inclusion of an amylase-enabled hybrid in dairy rations showed promising effects by improving feed efficiency and ECM feed efficiency in dairy cows. However, the amylase-enabled corn silage used in the current experiment tended to have a greater overall availability of digestible nutrients and was greater in starch content, when compared with its isogenic counterpart. In this regard, effects observed on cow performance can be attributed, at least partially, to differences in silage nutritional composition. Research investigating the effects of feeding amylase-enabled corn silages to dairy cows is limited. This makes it challenging to concretely determine the mode and extent of action of the amylase enzyme in the current study. Thus, future research on amylase-enabled hybrids should be focused on determining modes and stages of action of the enzyme, potential nutritional and environmental benefits in dairy cows, and possible interactions with other additives or dietary ingredients. The amylase-enabled technology seems to be promising, however, questions remain that must be answered to fully understand the benefits of the inclusion of amylase-enabled corn in dairy cow diets.
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