EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Effects of supplementation on the ingestive behaviour of grazing steers


Grass and Forage Science 43(4): 353-361
Effects of supplementation on the ingestive behaviour of grazing steers
Herbage intake is usually depressed when beef cattle grazing abundant pastures are supplemented with energy-rich feedstuffs but relatively little is known about the effects of supplementation on the components of ingestive behaviour. An experiment was conducted to establish the effect of ground corn (Zea mays L.) on the ingestive behaviour of yearling Angus and Angus .times. Hereford steers (Bos taurus) (mean live weight (LW) of 323 kg) grazing autumn stockpiled Boone cocksfoot (Dactylis glomerata L.) using a tethered grazing system in which the experimental unit was the tethered steer and its grazing area (45 m2) for one grazing session. Herbage dry matter (DM) mass was 1662 kg ha-1 and herbage DM allowance was 7.5 kg steer-1 for each grazing session. Herbage DM intake was measured as the difference between herbage DM mass offered and refused. Grazing took place during two daily sessions each of about 2 h duration commencing at 08.00 and 14.00 h for 9 days. Ground corn (0,1.5, 3.0 and 4.5 kg steer-1) was fed each day at 12.00 h and had no significant (P > 0.05) effect on rate of DM intake, rate of biting or DM intake per bite. Mean DM intake was 6.2 kg steer-1 d-1 (87 mg(kg LW)-1 min-1). Steers averaged 4832 bites per grazing session, with a mean DM intake per bite of 644 mg (2.0 mg (kg LW)-1) and a mean rate of 44 bites min-1. Data obtained at the beginning and end of each grazing period on ingestive behaviour of one group of four steers (mean LW of 306 kg) fitted with oesophageal fistulae supported data for the two groups of normal steers and showed no response to supplementation. Mean values for rate of DM intake, DM intake per bite and rate of biting established for the fistulated cattle were 73 mg (kg LW)-1 min-1, 521 mg bite-1 (1.7 mg (kg LW)-1) and 39 bites min-1, respectively.

Accession: 001820313

DOI: 10.1111/j.1365-2494.1988.tb01890.x

Download PDF Full Text: Effects of supplementation on the ingestive behaviour of grazing steers



Related references

Effects of supplementation on the ingestive behavior of grazing steers. Grass & Forage Science 43(4): 353-362, 1988

Ingestive behaviour of grazing steers. Forages: the keystone of agriculture: 295-299, .

Diurnal ingestive behavior of grazing steers fed increasing levels of energy supplementation. Revista Brasileira de Zootecnia 32(6): 1408-1418, 2003

Ingestive behavior of grazing steers fed increasing levels of concentrate supplementation with different crude protein contents. Tropical Animal Health and Production 47(2): 423-428, 2015

Effects of sward height and concentrate supplementation on the ingestive behaviour of spring-calving dairy cows grazing grass-clover swards. Applied Animal Behaviour Science 40(2): 101-112, 1994

Estimation of herbage intake based on components of ingestive behaviour in grazing steers. Revista Argentina de Produccion Animal 5(9/10): 573-579, 1985

Studies of the ingestive behaviour of steers and geldings conducted with a tethered grazing technique. Dissertation Abstracts International, B Sciences and Engineering 47(11): 4357B-4358B, 1987

Ingestive behaviour of steers grazing two cultivars of Festuca arundinacea Schreb and its relationship with canopy structure. Revista Argentina de Produccion Animal 6(3-4): 159-163, 1986

Ingestive behaviour of beef steers grazing oat and Italian ryegrass pasture with different levels of green leaves. Ciencia Rural 34(5): 1543-1548, 2004

Short-term ingestive behaviour of sheep and goats grazing grasses and legumes. 2. Quantitative relationships between sets of sward and ingestive behaviour variables. New Zealand Journal of Agricultural Research 39(1): 75-82, 1996