Partners Networking to Advance South Island Dairying

West Coast Monitor Farm

Westland has some unique challenges such as high rainfall and seasonal dry peroids which are variable across the region. Westland has now been collecting data for 10 years and continues to building on the information currently available.

This project funded by Westland Milk Products, DairyNZ, CRV Ambreed, ARL-Ravensdown and Rabobank aims to generate reliable pasture growth and quality, and soil temperature information, over the next 12 months, on two commercial dairy farms in Westland.

Farm walks schedule for this season are weekly from August to May, and monthly over the winter period.

Each week we will provide a Weekly Summary of information from the following regions:

Buller: Mawheraiti (Stu and Deb Bland), Westland: Kowhitirangi (Anna and Jeremy Hart).

Expanded farm summary for the week ending 16 January 2019

CO comment

Welcome back to the West Coast Farm watch 2019. I trust everyone had an enjoyable Christmas and New Year and if you didn’t quite get a break over holidays, you have one planned in January.

The weather was fantastic over Christmas, although some could have done with more rain than we got, it is safe to say we are still in a better position than this time last year.

 

With the hot weather we will have seen a decrease in production, as the cows will have been under heat stress. In fact, for the week 1-7 January, Northern West Coast animals experienced the entire week being too hot for comfort and for the entire 7 days Friesian and crossbreed cows would have experienced a drop in milk solids. In 4 of the 7 days these same animals may have experienced health impacts as a result.

For Jersey cows, 4 out of the 7 days would have impacted their production.

 

When temperature humidity index (THI) reaches 68 for Friesians and 75 for Jerseys (equivalent to 21 and 25.5°C respectively at 75% relative humidity) New Zealand cows begin to experience the effects of heat stress. This is seen by a reduction in feed intake and a drop of around 10g milksolids per day per unit increase in THI.

For example, an increase in THI from 68-78 would equate to a 100g drop in milksolids/cow/day. Note that a drop in fat/protein percentage occurs before a drop in yield or milksolids is visible.

Be sure that cows have access to a good water source and shade on these days. Minimising the effects of heat stress will minimise the effects on production.

For more tips or to calculate the temperature humidity index in your area visit https://www.dairynz.co.nz/animal/cow-health/heat-stress/

Farm Summary

 

Mawheraiti

Kowhitirangi

Average cover (kg   DM/ha)

2221

2117

APC   (9 January)

2245

2211

Rotation length   (days)

23

28

Stocking rate

2.9

2.3

Percentage in milk

100

100

Milksolids kg/cow

1.76

1.52

Milksolids kg/ha

4.4

3.1

MS/cow (season to   date)

243

245

MS/ha (season to   date)

612

498

 

 

 

N (kg/ha) year to   date

83

158

Current N application   rate kg N/ha

28

 

 

 

 

 

 

 

DM%

16.8

16.7

Pasture ME

12.7

12.7

Pasture NDF

42.2

47.9

Pasture CP

18.8

20.8

 

 

 

Target Intake (kg   DM/cow/d)

20

18

Supplement   (kg/cow/day)

1.1

1.8

 

 

 

Soil temperature (°C)

18

-

Growth Rate (kg   DM/day)

49

34

Rainfall

25

75

Conditions for   farmwalk

Very hot and dry

Very hot and dry

Comments

 

 

 

Previous Weekly Summaries

 

2019

 
 
 
16 Jan
9 Jan

 

 

2018

    31 Oct                       30 May       31 Jan
 26 Dec 28 Nov 24 Oct 26 Sep       

 23 May

 25 Apr

28 Mar 28 Feb 24 Jan
 19 Dec 21 Nov 17 Oct 19 Sep        16 May  18 Apr 21 Mar 21 Feb 17 Jan
12 Dec 14 Nov 10 Oct 12 Sep     20 Jun 9 May 11 Apr 14 Mar  14 Feb 10 Jan
5 Dec 7 Nov 3 Oct 5 Sep 29 Aug 4 July 6 Jun 2 May 4 Apr 7 Mar 7 Feb  3 Jan

 

2017

                       
       29 Sept           30 Mar    
22 Dec 24 Nov  26 Oct 21 Sept 24 Aug   29 Jun 25 May 27 Apr 24 Mar 24 Feb 26 Jan
15 Dec 16 Nov  20 Oct 14 Sept 17 Aug 20 Jul   19 May  20 Apr 17 Mar 17 Feb 20 Jan
8 Dec 9 Nov  12 Oct 7 Sept 10 Aug   9 Jun 12 May 13 Apr 9 Mar 10 Feb 11 Jan
1 Dec 3 Nov 6 Oct 1 Sept 3 Aug    2 Jun 4 May 6 Apr 3 Mar 2 Feb 4 Jan


2016

       30 Sep                
23 Dec  25 Nov   22 Sep 26 Aug   30 June 26 May 28 Apr     28 Jan
16 Dec 17 Nov 27 Oct 15 Sep 19 Aug   23 June 19 May 21 Apr 18 Mar 25 Feb  
8 Dec 10 Nov 14 Oct 8 Sep 12 Aug 22 Jul 9 June 12 May 14 Apr 11 Mar 18 Feb  
1 Dec 3 Nov 7 Oct 1 Sep 5 Aug   3 June 5 May 8 Apr 4 Mar 11 Feb