Microsoft PowerPoint - Tight times2 McNeill Aug09.ppt by lindayy

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									 Feeding dairy cows in tough times


                 Dr David McNeill
        Research Leader, TIAR Dairy Centre,
              University of Tasmania

Tight Management for Tough Times seminars, DairyTas, August 2009
     Feeding principles


Maximise intake of digestible nutrients

Balance th nutrients
B l     the t i t

D it at minimal cost/max efficiency
Do    t i i l      t/     ffi i
                 Options

                p       you grow
Use more of the pasture y g

Use less concentrate

Keep the concentrate level the same but buy
it cheaper/balance it better
Use less concentrate
  Know your Marginal rate of return

= Litres of milk per kg of extra grain fed

  MR        $/t concentrate at 25c/L
   1.5                 375
   1.0                 250
   0.5
   05                  125
Marginal response to concentrates

     1.60




(Bargo et al., J Dairy Sci.,2003; Fulkerson et al., J Dairy Sci., 2008)
  Use less concentrate – the risks

Loss of body condition – lower calving %

Lower milk protein %

Need to lower stocking rate

Harder to bounce back if milk price improves
Keep the concentrate level the same but
       y       p
    buy it cheaper/balance it better

  Which grain?

  Whi h energy rich b
  Which                   d t?
                i h by-product?

  Reduce protein meal and buffer/rumen modifier?
                                          Wheat                Barley        Oats Triticale Sorghum
                               18.00
                               18 00
                               17.00
                          M)




                               16.00
                               16 00
Available energy ( MJ/kg DM




                               15.00
                                                                                                               cattle
                               14.00
                                                                                                               Pigs
                               13.00
                                                                                                               Layers
                               12.00                                    C                                      Broilers
        e




                               11.00
                               10.00
A




                                9.00
                                8.00
                                       0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
                                                            Grain Num ber        (Black, J. 2008, Final Report , Premium
                                                                                 Grains for Livestock Program)
        72
Starch, 70
% DM
        68

        66

        64

        62

        60

        58
         0   2   4       6     8   10   12

                     Yield, t/ha
                          Remember
Get th     t t f            t    fi t
G t the most out of your pasture first

Buy feeds on $/unit of energy (ME) or protein (CP)

Balance the whole diet (ME, CP, NDF, Starch, minerals and vitamins)

Use grains/pellets with moderate levels of starch

Allow an adjustment period for new feeding strategies
                     More advice:

DairySmart project staff:

         Mark Fergusson
         Mark Freeman
         Rob Le Grange
         Lesley Irvine
         Liz Mann
         Guy Robertson

								
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