Nutrition and the Environment

Question 1

What are the primary concerns with increased animals in operations?

Answer 1

1. Excess nutrients in manure
2. Gas emissions

Question 2

Why is excess nutrient in manure bad?

Answer 2

It can leach through the soil into groundwater. High N and high P can have negative effects

Question 3

Why are gas emissions bad?

Answer 3

Methane is a greenhouse gas

Question 4

Ratio of N to P2O5 in swine manure

Answer 4

5:3

Question 5

What is phytase?

Answer 5

It is an enzyme that hydrolyzes phosphorus from phytate

Question 6

How do manufacturers determine phytase activity?

Answer 6

Evaluate responses on the field and cost of response

Question 7

Adding 1 g/kg feed with phytase results in a decrease in phosphorus excretion by ___%

Answer 7

30%

Question 8

How can you calculate CP from N?

Answer 8

N x 6.25

Question 9

1st limiting aa in swine? birds?

Answer 9

Swine: lysine
Birds: methionine

Question 10

Synthetic forms of amino acids for pigs?

Answer 10

L-lysine-HCl
D,L-methionine
L-threonine

Question 11

What synthetic amino acids are too expensive to add?

Answer 11

L-leucine
L-isoleucine