Improved fertilizer effect of nitrogen- trials in winter wheat

0 20 40 60 80 100

Cattle slurry

Pig slurry

Digested slurry

N-utilization, % (fertilizer equivalent)

Utilization of nitrogen in solid fraction

0 20 40 60 80

Spring barley,applied spring

Winter wheat,applied autumn

Winter wheat,applied spring

100

N-utilization, % (fertilizer equivalent)

Utilization of nitrogen in liquid fraction, spring application

0 20 40 60 80 100

Spring barley,injected

Spring barley,trailing hoses

Winter wheat,injected

Winter wheat, trailing hoses

N-utilization, % (fertilizer equivalent)

Cattle slurry to spring barley, 9 trials, 2000-2001

Yield,

hkg grain per ha

No nitrogen

Trailing hoses + harrowed

Injected before plowing

Injected after plowing

34,4

43,2

47,7

47,2

Pig slurry to winter wheat,11 trials, 2002-05

50 N + 100 kg NH4-N per ha

Yield, hkg grain per ha

Damage, hkg per ha

Excl. damage

Incl. damage

Trailing hoses 72,1 69,2 2,9

Injection 74,8 69,0 5,8

Cattle slurry to grass for silage,6 trials, 2004-05

80 kg NH4-N per ha

Yield, 2.+.3 cut, feeding units per ha

Damage, hkg per ha

Excl. damage

Incl. damage

Trailing hoses 37,4 37,0 0,5

Injection 38,2 38,1 0,1

Net economy for injection compared to trailing hoses

-40

-20

0

20

40

60

80

Fodderbeet

Spring

barley

Maize

Grass

Winter

barley

Winter

wheat

Winter rye

Ex

tra

yie

ld,

€ p

er

he

cta

re

Danish recommendations on injection:

Spring sown crops ………..….

Grass ………………………….

Winter cereal ………….………