Glucose and Insulin Response of Aged Horses Grazing Alfalfa, Perennial Cool-Season Grass, and Teff During the Spring and Late Fall

Michelle L. DeBoer, Marcia R. Hathaway, Patty Sue D. Weber, Craig C. Sheaffer, Kerry J. Kuhle, Krishona L. Martinson

Research output: Contribution to journalArticle

Abstract

Spring and late fall grazing can lead to metabolic problems in horses (Equus caballus L.) as a result of elevated nonstructural carbohydrates (NSC) in pastures. Therefore, the objectives were to determine the impact of different forage species on blood glucose and insulin concentrations of horses during the spring and late fall. Research was conducted in May (spring) and October (late fall) in St. Paul, MN. Alfalfa (Medicago sativa L.) and mixed perennial cool-season grasses (CSG) were grazed in spring, and CSG and teff (Eragrostis tef [Zucc.] Trotter) were grazed in late fall by six adult horses randomly assigned to a forage in a cross-over design. Jugular catheters were inserted 1 hour before the start of grazing, and horses had access to pasture from 8 AM to 4 PM in the spring and 8 AM to 12 PM in the late fall. Jugular venous blood samples were collected from each horse before being turned out (0 hours) and then at 2 hours intervals after turnout. Plasma and serum samples were collected and analyzed for glucose and insulin, respectively. Corresponding forage samples were taken by hand harvest. Seasons were analyzed separately, and data were analyzed using the MIXED procedure in SAS with P ≤ .05. Teff had lower NSC compared with CSG in the late fall (P ≤ .05) with subsequently lower average glucose, average insulin, and peak insulin in horses grazing teff compared with CSG (P ≤ .05). These results suggest grazing teff could lower the glucose and insulin response of horses during late fall.

Original languageEnglish (US)
Pages (from-to)108-111
Number of pages4
JournalJournal of Equine Veterinary Science
Volume72
DOIs
StatePublished - Jan 2019

Fingerprint

Eragrostis
Eragrostis tef
cool season grasses
Medicago sativa
Poaceae
Horses
alfalfa
insulin
grazing
Insulin
horses
Glucose
glucose
forage
neck
Neck
Carbohydrates
pastures
carbohydrates
blood serum

Keywords

  • Grazing
  • Horse
  • Late fall
  • Pasture
  • Spring

Cite this

Glucose and Insulin Response of Aged Horses Grazing Alfalfa, Perennial Cool-Season Grass, and Teff During the Spring and Late Fall. / DeBoer, Michelle L.; Hathaway, Marcia R.; Weber, Patty Sue D.; Sheaffer, Craig C.; Kuhle, Kerry J.; Martinson, Krishona L.

In: Journal of Equine Veterinary Science, Vol. 72, 01.2019, p. 108-111.

Research output: Contribution to journalArticle

@article{ff6ba2f58c9748c0afe490a092f2c9e2,
title = "Glucose and Insulin Response of Aged Horses Grazing Alfalfa, Perennial Cool-Season Grass, and Teff During the Spring and Late Fall",
abstract = "Spring and late fall grazing can lead to metabolic problems in horses (Equus caballus L.) as a result of elevated nonstructural carbohydrates (NSC) in pastures. Therefore, the objectives were to determine the impact of different forage species on blood glucose and insulin concentrations of horses during the spring and late fall. Research was conducted in May (spring) and October (late fall) in St. Paul, MN. Alfalfa (Medicago sativa L.) and mixed perennial cool-season grasses (CSG) were grazed in spring, and CSG and teff (Eragrostis tef [Zucc.] Trotter) were grazed in late fall by six adult horses randomly assigned to a forage in a cross-over design. Jugular catheters were inserted 1 hour before the start of grazing, and horses had access to pasture from 8 AM to 4 PM in the spring and 8 AM to 12 PM in the late fall. Jugular venous blood samples were collected from each horse before being turned out (0 hours) and then at 2 hours intervals after turnout. Plasma and serum samples were collected and analyzed for glucose and insulin, respectively. Corresponding forage samples were taken by hand harvest. Seasons were analyzed separately, and data were analyzed using the MIXED procedure in SAS with P ≤ .05. Teff had lower NSC compared with CSG in the late fall (P ≤ .05) with subsequently lower average glucose, average insulin, and peak insulin in horses grazing teff compared with CSG (P ≤ .05). These results suggest grazing teff could lower the glucose and insulin response of horses during late fall.",
keywords = "Grazing, Horse, Late fall, Pasture, Spring",
author = "DeBoer, {Michelle L.} and Hathaway, {Marcia R.} and Weber, {Patty Sue D.} and Sheaffer, {Craig C.} and Kuhle, {Kerry J.} and Martinson, {Krishona L.}",
year = "2019",
month = "1",
doi = "10.1016/j.jevs.2018.10.027",
language = "English (US)",
volume = "72",
pages = "108--111",
journal = "Journal of Equine Veterinary Science",
issn = "0737-0806",
publisher = "W.B. Saunders Ltd",

}

TY - JOUR

T1 - Glucose and Insulin Response of Aged Horses Grazing Alfalfa, Perennial Cool-Season Grass, and Teff During the Spring and Late Fall

AU - DeBoer, Michelle L.

AU - Hathaway, Marcia R.

AU - Weber, Patty Sue D.

AU - Sheaffer, Craig C.

AU - Kuhle, Kerry J.

AU - Martinson, Krishona L.

PY - 2019/1

Y1 - 2019/1

N2 - Spring and late fall grazing can lead to metabolic problems in horses (Equus caballus L.) as a result of elevated nonstructural carbohydrates (NSC) in pastures. Therefore, the objectives were to determine the impact of different forage species on blood glucose and insulin concentrations of horses during the spring and late fall. Research was conducted in May (spring) and October (late fall) in St. Paul, MN. Alfalfa (Medicago sativa L.) and mixed perennial cool-season grasses (CSG) were grazed in spring, and CSG and teff (Eragrostis tef [Zucc.] Trotter) were grazed in late fall by six adult horses randomly assigned to a forage in a cross-over design. Jugular catheters were inserted 1 hour before the start of grazing, and horses had access to pasture from 8 AM to 4 PM in the spring and 8 AM to 12 PM in the late fall. Jugular venous blood samples were collected from each horse before being turned out (0 hours) and then at 2 hours intervals after turnout. Plasma and serum samples were collected and analyzed for glucose and insulin, respectively. Corresponding forage samples were taken by hand harvest. Seasons were analyzed separately, and data were analyzed using the MIXED procedure in SAS with P ≤ .05. Teff had lower NSC compared with CSG in the late fall (P ≤ .05) with subsequently lower average glucose, average insulin, and peak insulin in horses grazing teff compared with CSG (P ≤ .05). These results suggest grazing teff could lower the glucose and insulin response of horses during late fall.

AB - Spring and late fall grazing can lead to metabolic problems in horses (Equus caballus L.) as a result of elevated nonstructural carbohydrates (NSC) in pastures. Therefore, the objectives were to determine the impact of different forage species on blood glucose and insulin concentrations of horses during the spring and late fall. Research was conducted in May (spring) and October (late fall) in St. Paul, MN. Alfalfa (Medicago sativa L.) and mixed perennial cool-season grasses (CSG) were grazed in spring, and CSG and teff (Eragrostis tef [Zucc.] Trotter) were grazed in late fall by six adult horses randomly assigned to a forage in a cross-over design. Jugular catheters were inserted 1 hour before the start of grazing, and horses had access to pasture from 8 AM to 4 PM in the spring and 8 AM to 12 PM in the late fall. Jugular venous blood samples were collected from each horse before being turned out (0 hours) and then at 2 hours intervals after turnout. Plasma and serum samples were collected and analyzed for glucose and insulin, respectively. Corresponding forage samples were taken by hand harvest. Seasons were analyzed separately, and data were analyzed using the MIXED procedure in SAS with P ≤ .05. Teff had lower NSC compared with CSG in the late fall (P ≤ .05) with subsequently lower average glucose, average insulin, and peak insulin in horses grazing teff compared with CSG (P ≤ .05). These results suggest grazing teff could lower the glucose and insulin response of horses during late fall.

KW - Grazing

KW - Horse

KW - Late fall

KW - Pasture

KW - Spring

UR - http://www.scopus.com/inward/record.url?scp=85056796330&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85056796330&partnerID=8YFLogxK

U2 - 10.1016/j.jevs.2018.10.027

DO - 10.1016/j.jevs.2018.10.027

M3 - Article

C2 - 30929773

AN - SCOPUS:85056796330

VL - 72

SP - 108

EP - 111

JO - Journal of Equine Veterinary Science

JF - Journal of Equine Veterinary Science

SN - 0737-0806

ER -