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Full-Text Articles in Life Sciences

A Mass Balance Based Model To Evaluate The Impact Of Amino Acid Profiles On The Feeding And Processed Value Of Soybeans, Kortney Paige Wagner Jan 2017

A Mass Balance Based Model To Evaluate The Impact Of Amino Acid Profiles On The Feeding And Processed Value Of Soybeans, Kortney Paige Wagner

Graduate Theses and Dissertations

As the soybean industry continues to grow and become more globally competitive, the interest surrounding soybean quality has also increased. Historically, soybeans have been traded as a commodity, but over the past few decades, the idea of component based pricing as a way to assess quality has become more practical. Pricing soybeans based on components would account for the high variation in soybean composition and reward high quality and consistency, while commodity pricing does not. In order for component based pricing to become a viable option for the soybean industry, a rapid, reliable, and relatively low-cost method for evaluating soybeans ...


Nutrient Mass Balance And Performance Of Feedlot Cattle Fed Barley Based Diets In Large Pens In Western Canada, Erin M. Hussey Apr 2012

Nutrient Mass Balance And Performance Of Feedlot Cattle Fed Barley Based Diets In Large Pens In Western Canada, Erin M. Hussey

Theses and Dissertations in Animal Science

Three separate large pen commercial feeding trials with approximately 9,000 heifers with either eight or ten reps/treatment were conducted at a Western Feedlots Ltd.- High River, a commercial feedyard near High River, AB, Canada. For all three experiments, Near Infrared Spectroscopy (NIRS) was used to segregate feed barley. In Exp. 1, barley was segregated based on digestible energy (DE) content as predicted by NIRS and heifers were fed low or high DE barley, or a 50:50 blend of the two. Feeding low DE barley improved weight gain, dry matter intake (DMI), and mortality; with little effect on ...


Nutrient Management In Beef Feedlots And Forage Replacement With Byproduct And Crop Residues, Annie J. Doerr Dec 2011

Nutrient Management In Beef Feedlots And Forage Replacement With Byproduct And Crop Residues, Annie J. Doerr

Theses and Dissertations in Animal Science

Finishing cattle performance and mass balance was evaluated with Micro-Aid was fed in diets containing wet distillers grains plus solubles (WDGS) at 35% (DM basis). Micro-Aid is a feed ingredient derived from a Yucca extract which contains saponins, and was included in the treatment diet at 1 g/hd daily in the supplement. There was no difference in performance and carcass characteristics between treatments. In the winter experiment, cattle fed Micro-Aid had a greater amount of OM and DM removed from the pen surface. Micro-Aid in the diet increased the amount of manure N and decreased N lossis in the ...


Phosphorus Retention, Accumulation, And Movement In Six Feedlot Runoff Vegetative Treatment Areas, Daniel S. Andersen, Matthew J. Helmers, Robert T. Burns Aug 2011

Phosphorus Retention, Accumulation, And Movement In Six Feedlot Runoff Vegetative Treatment Areas, Daniel S. Andersen, Matthew J. Helmers, Robert T. Burns

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Increased environmental awareness has prompted the need for improved feedlot runoff control. Vegetative treatment systems (VTSs) provide a cost effective option that may enhance environmental security. Vegetative treatment systems are typically designed on the basis of hydraulic performance, which may result in over-application of nutrients, especially phosphorus. This study assessed the retention, accumulation, and movement of phosphorus in vegetative treatment areas used for runoff control on six Iowa feedlots over a four year period. Phosphorus loadings and retention were calculated based on measured settled feedlot effluent, or vegetative infiltration basin, and vegetative treatment area runoff volumes and phosphorus concentrations. Results ...


Vermicomposting Of Sewage Sludge By Lumbricus Rubellus Using Spent Mushroom Compost As Feed Material: Effect On Concentration Of Heavy Metals., Adi Ainurzaman Jamaludin, Noor Zalina Mahmood, Azizi Abu Bakar, Noorlidah Abdullah, Jaime A Teixeira Da Silva Jan 2011

Vermicomposting Of Sewage Sludge By Lumbricus Rubellus Using Spent Mushroom Compost As Feed Material: Effect On Concentration Of Heavy Metals., Adi Ainurzaman Jamaludin, Noor Zalina Mahmood, Azizi Abu Bakar, Noorlidah Abdullah, Jaime A Teixeira Da Silva

Adi Ainurzaman Jamaludin

Vermicomposting of sewage sludge (SS) using spent mushroom compost from Pleurotus sajor-caju as feed material was conducted to determine the effect on the concentration of heavy metals, namely Cr, Cd, Pb, Cu, and Zn. Previous studies have reported the feasibility of brandling worms, Eisenia foetida, for vermicomposting SS, whereas we conducted vermicomposting by employing red worms, Lumbricus rubellus, with a combination of different percentages of SS and spent mushroom compost (SMC) for 70 days subsequent to 21 days of precomposting. The vermicompost produced in treatments with a low percentage of SS were fine in texture, dark in colour and odourless ...


Composting Or Stockpiling Of Feedlot Manure In Nebraska: Nutrient Concentration And Mass Balance, Matt K. Luebbe, G. E. Erickson, T. J. Klopfenstein, Matthew A. Greenquist, J. R. Benton Jan 2011

Composting Or Stockpiling Of Feedlot Manure In Nebraska: Nutrient Concentration And Mass Balance, Matt K. Luebbe, G. E. Erickson, T. J. Klopfenstein, Matthew A. Greenquist, J. R. Benton

Faculty Papers and Publications in Animal Science

When feedlot pens are scraped in the spring and summer, manure is often stored before land application can occur in the fall. Manure stockpiled or composted was evaluated for nutrient losses in 2 experiments for 104 (Exp. 1) and 111 d (Exp. 2). Stockpiles (n = 2 in Exp. 1 and n = 3 in Exp. 2) and compost windrows (n = 6 in Exp. 1 and n = 4 in Exp. 2) were constructed with feedlot manure scraped from pens and sampled upon construction and throughout the storage period. In Exp. 1, N loss was 3 times greater (P < 0.01) for compost compared with stockpile on d 104 (43.6 and 14.3%, respectively). Loss of C was 34.7% greater (P < 0.01) for compost compared with stockpile on d 104 (54.4 and 40.4%, respectively). Total mass loss (water + DM) was not different (P = 0.30) among storage methods on d 104 (20.0 and 15.8% for compost and stockpile, respectively). In Exp. 2, N loss from compost was 42.1% greater (P < 0.01) compared with stockpiling on d 111. Carbon losses in Exp. 2 were not different (P = 0.77) among storage methods on d 111 (38.4 and 37.5% for compost and stockpile, respectively). Total mass loss in Exp. 2 was less compared with Exp. 1 and was not different (P = 0.23) among storage methods (5.7 and 3.6% for compost and stockpile, respectively). When evaluated on a nutrient basis, stockpiled manure had greater N and C concentrations compared with composted manure.


Estimation Of Ammonia Emission From Manure Belt Poultry Layer Houses Using An Alternative Mass-Balance Method, Shunli Wang, Lingying Zhao, Xinying Wang, Roderick B. Manuzon, Hui Li, Matthew J. Darr, Harold M. Keener, Albert J. Heber, Ji-Qin Ni Jun 2009

Estimation Of Ammonia Emission From Manure Belt Poultry Layer Houses Using An Alternative Mass-Balance Method, Shunli Wang, Lingying Zhao, Xinying Wang, Roderick B. Manuzon, Hui Li, Matthew J. Darr, Harold M. Keener, Albert J. Heber, Ji-Qin Ni

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Ammonia (NH3) emission from animal feeding operations (AFOs) has caused concerns on public health and environmental degradation, such as ecosystem acidification, eutrophication, and formation of PM2.5 fine particles. Current ammonia emission measurement methodologies are accurate and reliable, but time consuming, expensive, and impractical for most facilities. In the present study, an alternative and cost effective mass balance methodology was developed to predict the ammonia emission from animal facilities. The mass balance equations have been developed to eliminate needs for tracking manure flow rate to obtain accurate NH3 estimation. The methodology was applied to three manure-belt layer poultry houses with ...