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(1)

Quality of pressed pulp silage in big bales

Ueli Wyss

Agroscope Liebefeld-Posieux, Switzerland

Federal Research Station for Animal Production and Dairy Products

(2)

Sugar beet pulp production in Switzerland Sugar beet pulp production in Switzerland

Figures of 2004 Figures of 2004

Sugar beets 1'466'900 t

Sugar beet pulp quantity total 332'074 t 100%

Quantity for drying 85'700 t 26%

Quantity for ensiling 246'374 t 74%

Quantity in big bales 54'346 t 22%

(3)

Big bale production in the sugar beet factory

(4)

Big bales

Weight of one bale: 1’200 kg

Density: 940 kg pro m 3 Transport “ on the farm!

(5)

z Opening two bales in March, May, June and July

z Unloading a layer of 7 cm during 14 days

z Taking samples on day 0, 7 and 14

Experiment 2000

(6)

0 5 10 15 20 25

March May June July

D M -c onte n t %

Day 0 Day 7 Day 14

DM-contents of the big bales

(7)

0 5 10 15 20 25

March May June July

S u ga r c o nt e n t g/k g D M

Day 0 Day 7 Day 14

Sugar content of the big bales

(8)

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

March May June July

pH

Day 0 Day 7 Day 14

pH-values of the big bales

(9)

0 5 10 15 20 25 30 35 40

March May June July

La c tic a c id, g/k g D M

Day 0 Day 7 Day 14

Lactic acid content of the big bales

(10)

0 5 10 15 20 25 30 35 40

March May June July

A c e tic a c id, g/k g D M

Day 0 Day 7 Day 14

Acetic acid content of the big bales

(11)

0 10 20 30 40 50 60 70 80 90 100

March May June July

DL G -P o in ts

Day 0 Day 7 Day 14

Silage quality of the big bales

(12)

-10 -5 0 5 10 15

0 24 48 72 96 120 144 168 192 216 240 Hours after unloading

Differences of temperature, °C

Day 0 Day 7 Day 14)

Development of the temperature in the decompacted silages

(13)

0 5 10 15 20 25

March May June July

A e robic s ta b ilit y , hour s S

Day 0 Day 7 Day 14

Aerobic stability of the the big bales

(14)

0 1 2 3 4 5 6 7 8

March May June July

Ye a s ts , l o g c fu /g

Day 0 Day 7 Day 14

Yeasts in the big bales

(15)

y = -0.107x + 8.35 R

2

= 0.69

4 5 6 7 8 9

0 12 24 36

Aerobic stability, hours

Y e a s ts , log c fu pe r g

Relation between the aerobic stability and yeasts

(16)

Influence of holes in the strech-film

(17)

Summary

z The structure of the pressed pulp silage in the bales was similar to that of the fresh pulp

z No butyric acid was found in the silage, the quality of the pulp silage was very good.

z The samples taken on the first day had higher pH-values and lower lactic acid contents in comparison to the samples taken after 7 or 14 days.

z After the taking out the decompacted silages heated very rapidly.

z The longer the bales stayed open, the more they tended to heat.

z With a longer storage period, the bales heated a little less rapidly.

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