Investigations into some effects of cysteine administration to the New Zealand Romney : a thesis presented in partial fulfilment of the requirements for the degree of Master of Agricultural Science in Animal Scienc

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thesis sent in al fulfi of the rements for e

D e of er of cultural cienc in Animal Science.

by

G. • Dryden

ey Univ ty, New Zealand January, 1968.

l.,

I sh to thank sors, • F.R •• C

t r encoura a stance over the course this sterate.

are so due to • L. H his assistance

in for e s us in these ments.

I so sh to e a stance ce ven

ers of the nary Cli cal ci ences

H st assey.

versi ty, by of e st s of the orth

Ho t the D of fie I ri esearch.

on en.

.,

L I

N

2.

I.

Prot n

T"

l.

Int

cy ( c)

c

( ) (e)

me e I

H r

i

on

conver interconv

ne

s on on le a

excr on ⁽

ucts et

Cyst (e) i era

n on

ne 0 c st

ne

d

)ine on

e into wool

e

on

1 2 3

5

5

21

22

iii.

III. ^{0 u}

TO

of

c

^t(e)ine

1 ^.... v

E of Cont ni

on on the Character of 1

(a) the ctemic c si tion e wool

(b) ameter

(c) the cal es of

3

Int on

ls

Di ty- ons

(a) collection

(b) t en yses

(c) dry matter det nations

F e es

Cyst ne s

(a) el re se

(b) n level

ol and IJ1easurement et

IVl s of Data sis (a) dose 1 response (b) prot n 1

D

on on

no-Acid the

t

the fibre

s

34

35 35

37 37 37

39 40 40 42 42 45 45

Dose L e e

51

(a) ·wool h rate response 52

(b) ameter re onse

53

Prot n Lev ment

(a) wool rate re se

54

(b) ameter response 57

( c) t ect of c ne i on on

the l i of the d 58

(d) ect of c ne i on on

.... ^v 58

5

Re ts

sm of e C t ne ect

i.,

v.

s

^{i i .}

pa

ote: ¹ f' means ci out).

2.1. Cont d Cone ons

in the Rumen Contents. 9

2.2. Occurrence of in 1 s er

35

_{cy ne I on.}

2.3 ..

^E, ect Cont no- d

on uc on. 32

n Response to Cont

no- d st on.

33

3.1. t p s. 37f.

of ents in the ^t:. n Level ment.

ot on e se L Re e

Post- ^p

Rot on Protein L

3 5

. .

^{~;o -" on Us ons s}

v

^ance

s

es. 49

4.1. lVlean ly 1 from Patch 2. 52f

f

1

4 ^s e

e In on 5

• o. /

on P 55

5

at

4. • ^j s e 5

4.

r

.11. es ons b 1

a 7 5

s ons b ns

a f

4 .

^{1':< / . Pan r;}

^-

^{~ e Prot n and er I1ti s. 5Sf}

4.

^{y s} a nee e t n

l i a. 5Sf

4. 5. ^s a nee ter

bi a.

on of Protein in the

2. 2. Pro s ^p s of a1

c

ne orr1 ate.

2. 3. of ore I

Cyst( ) ine.

2.4. Occurrence L in

.1.

Us

3.2.

4.1.

4.2. Fi

.

^:; ..,

.

^e

R

1

es

Goncentra on s over

on p en e

Up the Prot n Lev

at s.

ss ven e Gont

Rot on e L

at R es to C

ameter Res e to G

on

7

t s of

10

R ons of

2

f

23f

t ons

Cant

3f

1

s u f

Re e

ne I on. 5

ne I on 53f

ons

54f

i

l ate e es in

Prot n L

e arneter e s in Prot n

L

5

4. 6. bre ameters r R p to

r D ons.

* 7. ^Re es to Cyst ne I on.

5.1. ^{p F saly I}

5. 2. p s

c

^r Venous I

c

ne. 60

et srn (e) i ne 1 7

er in Po on in e J V n.

3. 3. ^{t I on}

c

^er

ne

6 1 not n

22 22 read ^I e,

. ^'

59 .(5.1) no arrmv 0 c net.

71 3 'D ^{Beva "'! • )}

72 ^f hi n-

t n- ne ^{SST •}