Abstract
Abstract:
Subclinical ketosis (SCK) in dairy cattle is a metabolic disease that
occurs around the calving period and increases the risk on other
diseases. SCK and other diseases result in, e.g., milk losses, reduced
pregnancy rate, culling, and therefore have environmental and economic
consequences. This study aimed to estimate the environmental and
economic consequences of SCK and related diseases in dairy farming.
A dynamic stochastic simulation model at cow level was developed
and combined with a life cycle assessment and partial budget analysis.
The model was divided into 4 parts. In part one, cows receive a parity
(1–5+) and a potential milk production. Cows subsequently have a risk
on getting retained placenta or milk fever (part 2), SCK (part 3), and
metritis, displaced abomasum, clinical ketosis, lameness or mastitis
(part 4). The risk on diseases depends on parity and previous diseases.
The model was parameterized using literature. Inputs are the number
of dairy cows, prevalence of diseases and culling rate, outputs are the
change in global warming potential (GWP) and profit per case of SCK.
Outputs were divided in direct (SCK) and indirect (other diseases due
to SCK) consequences, that were estimated with the attributional risk of
SCK. Cows with (a combination of) diseases had: a reduced daily milk
yield, discarded milk if treated, an increased calving interval, and risk
of culling. Monte Carlo simulation was performed to find the variation
in the output. Preliminary results showed that the costs increased from
€33.0 (±31.3) to €55.2 (±58.3) and GWP increased from 1.3 (±1.3) to
1.8 (±2.0) % CO2-e/unit milk per parity based on milk losses per case
of SCK. Results differ per parity (P <0.001) due to differences in milk
yield and risk on diseases. The highest contribution came from SCK
(68%). Other diseases particularly had an effect on the variation of the
output. Future calculations will be extended by including reproduction
and culling, and by performing sensitivity analyses. In conclusion,
SCK has an effect on the environmental and economic performance
of dairy farming.
| Original language | English |
|---|---|
| Title of host publication | Book of Abstracts of the 66th Annual Meeting of the European Federation of Animal Science |
| Place of Publication | Wageningen |
| Publisher | Wageningen Academic Publishers |
| Pages | 141-141 |
| Volume | 21 |
| ISBN (Print) | 9789086862696 |
| Publication status | Published - 2015 |
| Event | EAAP - 66th Annual Meeting 2015 - Warsaw, Poland Duration: 31 Aug 2015 → 4 Sep 2015 |
Conference
| Conference | EAAP - 66th Annual Meeting 2015 |
|---|---|
| Country/Territory | Poland |
| City | Warsaw |
| Period | 31/08/15 → 4/09/15 |
