comp of feed

Question 1

what is the biggest challenge with composition of feedstuffs

Answer 1

realtime measurements

Question 2

what are the 5 assessments on the quality of feeds

Answer 2

quantity
availability
degradability
balance
capture

Question 3

over what % of fat can effect carbohydrate breakdown

Answer 3

5/6%

Question 4

what component of feedstuffs has the largest effect on feeding value

Answer 4

fibre

Question 5

what does acid detergent lignin measure

Answer 5

lignin

Question 6

what does acid detergent fibre measure

Answer 6

lignin and cellulose

Question 7

what does neutral detergent fibre measure

Answer 7

lignin, cellulose and hemicellulose

Question 8

what % should NDF content be maintained at as proportion of dry matter

Answer 8

30%

Question 9

what % of NDF content should be made up of forages

Answer 9

21%

Question 10

what does NDF fraction of fibre stimulate

Answer 10

stimulates chewing activity and related to particle size

Question 11

approx what is the % of energy lost due to methane

Answer 11

6-7 %

Question 12

what is nutrient availability influenced by

Answer 12

degradability

Question 13

what would a good protein content be in a silage sample

Answer 13

above 12%

Question 14

2 factors that will reduce the bacteria growth in a silage sample

Answer 14

1. removal of oxygen from silage using compactor
2. keeping pH low as close to 4 as possible inhibit bacteria growth

Question 15

what is a good DMD of silage

Answer 15

above 70% good
average 67-68%

Question 16

what is the aim of ammonia in a silage sample as % of total nitrogen

Answer 16

below 10%

Question 17

what does high ammonia in a silage sample indicate

Answer 17

bad conservation

Question 18

why is high lactic acid needed in silage sample

Answer 18

to reduced pH of sample leading to more protein and energy conserved

Question 19

how can a DMD of 75% compared to 60% have an effect on liveweight gain

Answer 19

up to 60% lower liveweight gain

Question 20

what is the total amount of feeds imported to country for animal use in tonnes

Answer 20

700 million tonnes

Question 21

why is soya highest imported cereal what does it offer

Answer 21

bioavailable amino acids/ quickly available

Question 22

in a wheat grain where in the starch for energy located

Answer 22

endosperm

Question 23

list some low protein feeds

Answer 23

cereals
beet pulp/ citrus pulp
soya hulls
molasses

Question 24

what is the oil content of cereals 10 - 60g/kg

Question 25

why are cereals processed ?

Answer 25

to make starch more available increase surface area for uptake

Question 26

why are citrus or beet pulps used

Answer 26

to maintain fibre in the rumen and increase saliva production

Question 27

why is sunflower meal not used in Ireland even though has a CF of 28%

Answer 27

because quality of protein is not good

Question 28

what is a common deficiency caused feeding too much soyabean

Answer 28

iodine deficiency as raw beans contain goitregens inhibiting the uptake of iodine

Question 29

why is cottonseed meal not often used

Answer 29

very variable may contain gossypol risk of aflatoxins