PMID- 10521049
OWN - NLM
STAT- MEDLINE
DCOM- 19991109
LR  - 20190513
IS  - 0021-8812 (Print)
IS  - 0021-8812 (Linking)
VI  - 77
IP  - 10
DP  - 1999 Oct
TI  - Effects of level and source of carbohydrate and level of degradable intake 
      protein on intake and digestion of low-quality tallgrass-prairie hay by beef 
      steers.
PG  - 2846-54
AB  - Ruminally fistulated steers (n = 13; 263 kg) were used in an incomplete Latin 
      square with 13 treatments and four periods to evaluate the effects of level and 
      source of supplemental carbohydrate (CHO) and level of degradable intake protein 
      (DIP) on the utilization of low-quality, tallgrass-prairie hay. Steers were given 
      ad libitum access to forage (5.7% CP, 2.6% DIP, and 74.9% NDF). The 
      supplementation treatments were fashioned as a 2x3x2 factorial arrangement plus a 
      negative control (NC; no supplement). The factors included two DIP levels (.031 
      and .122% BW) and three CHO sources (starch, glucose, and fiber) fed at two 
      levels (.15 and .30% BW) within each level of DIP supplementation. The effect of 
      supplementation on forage OM intake (FOMI) was dependent (P<.01) on level and 
      source of CHO and level of DIP fed. When DIP was low, forage, total, and 
      digestible OM intakes were generally greater for the starch treatment than for 
      the nonstarch treatments. However, when the DIP level was high, intakes were 
      greater for the nonstarch (i.e., fiber and glucose) treatments. Generally, FOMI 
      decreased (P<.01) when more supplemental CHO was provided. Supplementation 
      typically increased fiber digestion, but the response was dependent (P<.01) on 
      level and source of CHO and level of DIP. Generally, supplements with low levels 
      of CHO improved NDF digestion (NDFD). However, supplements with the high level of 
      CHO decreased NDFD, except for fiber at the high level of DIP. Organic matter 
      digestion was increased by supplementation, but the impact of increasing CHO was 
      dependent (P<.01) on source of CHO and level of DIP. Supplementation treatments 
      had significant impact on ruminal pH, NH3 N, and the total concentration of 
      organic acids as well as their relative proportions. In conclusion, supplemental 
      DIP enhanced the use of low-quality forage; however, the impact of supplemental 
      CHO on low-quality forage use was dependent on source and level of CHO offered, 
      as well as the level of DIP provided.
FAU - Heldt, J S
AU  - Heldt JS
AD  - Department of Animal Sciences and Industry, Kansas State University, Manhattan 
      66506-1600, USA.
FAU - Cochran, R C
AU  - Cochran RC
FAU - Mathis, C P
AU  - Mathis CP
FAU - Woods, B C
AU  - Woods BC
FAU - Olson, K C
AU  - Olson KC
FAU - Titgemeyer, E C
AU  - Titgemeyer EC
FAU - Nagaraja, T G
AU  - Nagaraja TG
FAU - Vanzant, E S
AU  - Vanzant ES
FAU - Johnson, D E
AU  - Johnson DE
LA  - eng
PT  - Journal Article
PL  - United States
TA  - J Anim Sci
JT  - Journal of animal science
JID - 8003002
RN  - 0 (Dietary Carbohydrates)
RN  - 0 (Dietary Proteins)
SB  - IM
MH  - Animals
MH  - Cattle/*metabolism
MH  - Dietary Carbohydrates/administration & dosage/*pharmacology
MH  - Dietary Proteins/administration & dosage/*pharmacology
MH  - Dietary Supplements
MH  - *Digestion
MH  - *Energy Intake
MH  - Male
MH  - Poaceae/*metabolism
MH  - Silage
EDAT- 1999/10/16 00:00
MHDA- 1999/10/16 00:01
CRDT- 1999/10/16 00:00
PHST- 1999/10/16 00:00 [pubmed]
PHST- 1999/10/16 00:01 [medline]
PHST- 1999/10/16 00:00 [entrez]
AID - 10.2527/1999.77102846x [doi]
PST - ppublish
SO  - J Anim Sci. 1999 Oct;77(10):2846-54. doi: 10.2527/1999.77102846x.