Lucerne Agronomy

74 Pages·2016·6.31 MB·English

by  Derrick Moot

This work byProf. Derrick Moot and the Lincoln University Dryland Pastures Research Teamis licensed
under aCreative Commons Attribution-NonCommercial-NoDerivatives4.0 International License.
Flock Hill, 28 July 2016
Lucerne Agronomy
Dr Derrick Moot
Professor of Plant Science
Website
Handouts & presentations
FAQs
Direct link to Blog
www.lincoln.ac.nz/dryland
Experiment site
Rep 1
Rep 2
Rep 3
Growth rates (2 year means)
D-N
21.9 t/ha
120 I-N
)
d D+N
/
a
h I+N
/ 90
g
k
(
15.7 t/ha
e
t
a 60
r

h
9.8 t/ha
t
w
o
30
r
G
6.3 t/ha
0
J A S O N D J F M A M J J
Month
Mills et al. 2006, 2009
Winter
⇒ temperature response
ky
ollocersit
Pv
M Uni
Kn
o: ol
otnc
PhLi
The Nitrogen gap
30
I +N
I –N
) y = 7.0 kg DM/ha/oCd
a
h 21.9 t/ha
20
/
t
(

d
l
e
i
y

M
10
D
9.8 t/ha
y = 3.3 kg DM/ha/oCd
0
0 1000 2000 3000
Thermal time (°Cd)
Mills et al. 2006; 2009
Nitrogen deficient pasture
1000 kg N/ha
Nitrogen applied in NZ
500
397 000 t
)
t

0400
0
0
'
(

n300
o
i
t
p
m
200
u
s
n
o
100
c 6 000 t

N
0
Year
NZ Fertiliser Association, 2015
High feeding value pastures have:
• high legume content
• high leaf content
• low stem content
• young herbage age
Sheep prefer 70% legume, 30% grass
h
g
u
ggoro
o GriMarlb
o: Jo’
Photmpell
e
T
‘