1 / 14

Oklahoma State University

NUTRIENT REMOVAL WITH GRAZING CATTLE Steven C. Smith Area Extension Livestock Specialist McAlester, OK. Oklahoma State University. More grass = more cattle. BODY COMPOSITION. Across species and age, fat-free body composition is remarkably similar. water 74-76% protein 20-22% ash 3-5%

britanni-farmer
Download Presentation

Oklahoma State University

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. NUTRIENT REMOVAL WITH GRAZING CATTLESteven C. SmithArea Extension Livestock SpecialistMcAlester, OK Oklahoma State University

  2. More grass = more cattle

  3. BODY COMPOSITION • Across species and age, fat-free body composition is remarkably similar. water 74-76% protein 20-22% ash 3-5% • Fat: <5% to over 40%. cattle, goats, mice, rats, sheep, swine, chickens, quail, turkeys, fish & humans OSU

  4. Body Composition, Cattle Weight Water Protein Fat Ash Newborn 74 19.0 3 4.0 200 70 19.6 6 4.6 400 66 19.3 11 4.4 600 62 19.2 14 4.6 800 58 18.7 19 4.2 1000 53 17.6 26 3.8 Armsby, Pond

  5. FUNCTIONS OF N & P • Phosphorus found in: • Bone 17-18% • Phospholipids (fats) used in cell metabolism, structure, membranes, energy metabolism • Blood serum, RNA & DNA & enzymes • Nitrogen used as a component of protein, found in blood, excreted in urine & as component of feces.

  6. BRIGGS GRAZING DEMO. • Growing, breeding, 823# heifers • Stocking rate • .9A/head for litter treatment • .9A/head for commercial fertilizer • 2.5A/head for control • Season gains • 107# litter • 125# commercial fertilizer • 71# control OSU Extension

  7. NUTRIENTS REMOVED BY CATTLE • Litter, 107# gain • 5.36# protein= .86# N, .21# P (44% fat) • Commercial Fertilizer, 125# gain • 5.33# protein= .85# N, .21# P (51% fat) • Control, 71# gain • 6.95# protein = 1.12# N, .27# P (27% fat)

  8. NUTRIENT REMOVAL CROP N, lbs P, lbs Corn (60 bu/A) 43 8.8 Milo (30 bu/A) 27 4.8 Bermuda hay (3 tons/A) 86 10.3 --------------------------------------------------------------- Corn 9%CP .29%P Milo 11 .32 Ber. Hay 10 .19 NRC, 1996

  9. $$$ ECONOMICS • Broiler litter, $9/T ($50/load, spread) • Urea @ $180/T = $0.20/# N • Opportunity cost of land = $80/acre/yr • no taxes, fencing, weed control, etc • 6 month grazing season • Stocking rate • litter = .6A/head or 1.7 head/A • fertilizer = .6A/head or 1.7 head/A • no fertilizer = 1.5 A/head or .7 head/A

  10. BUDGET, 450# Stocker Cattle No fert Litter Fert. • Fert. $/A 0 30 38 • Opp. $/A/Y 80 80 80 • Total 80 110 118 • Forage $/head* 60 42 47 • Brkvn. price 79.50 77.11 77.84 *1/2 land + fert x stocking rate

  11. OSU Extension Cattle are nutrient recyclers, not nutrient harvesters.

More Related