Site pages
Current course
Participants
General
3 March - 9 March
10 March - 16 March
17 March - 23 March
24 March - 30 March
31 March - 6 April
7 April - 13 April
14 April - 20 April
21 April - 27 April
28 April - 4 May
5 May - 11 May
Measurement of pasture consumption and its digestibilty
Aim /font>
Requirements /font>
Procedure First method Example
Second method In this method, the DMI is determined by using an indicator. This indicator can be a natural indicator (present in feed) like lignin or an external indicator (mixed with feed) like chromic oxide (or) chromic oxide (green). /font>/font>
External indicator fed (g)
Faecal DM output (g) = -------------------------------------------------------------- x 100
% external indicator in faeces grab sample DM /font>
Note:
The DM consumed (g / d) can also be determined from DM digestibility by use of internal indicator as shown below.
% indicator in feed % nutrient in faeces
DM digestibility = 100 – {100 x -----------------------------x -----------------------------}
% indicator in faeces % nutrient in feed
Indigestibility of DM = {100 – Digestibility of DM}
DM in faeces (g)
DM consumed (g/d) = ---------------------------------- x 100
% indigestibility of DM
Example:
Solution:
1. Calculation of DM voided in faeces (g/d):
2. Calculation of DM consumed per day:
3. Calculation of DM digestibility:
4. Calculation of indigestibility of DM:
5. Calculation of DM consumed based on the indigestibility of feed: /font>
1. Calculate the DMI, DM digestibility and CP digestibility in an animal maintained on range conditions by using the following data.
/font>/font>42.5 %: Calculate the DM intake and DM digestibility of an animal maintained on range conditions by using the following data. Grab samples should be taken from each animal to keep error below 5 % and chromic oxide should be fed for atleast 10 days before the start of sampling. Faeces bags (if necessary) method: In this method, the animals are harnessed with faeces bags. An animal on range has voided 2500 g DM in faeces in 24 h. The digestibility of DM of pasture on range determined separately was 50 %. Calculate the amount of DM consumed by that animal.
|
Last modified: Wednesday, 4 April 2012, 5:22 AM