Grass Watch May 2016

Grass Watch Report – 27 June 2016

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Grass Watch Report – 27 June 2016

There has been a small decrease in grass growth this week to 70 kg DM/ha/day, down 1 kg DM/ha/day compared to last week. The recent wet weather conditions have impacted on grass dry matter, which has fallen to 15.6%. The decreasing grass dry matter has maintained pressure on potential grass DMI, which has fallen to 11.3 kg/day. The fall in DMI coupled with a drop in grass ME of 0.4 MJ/Kg DM has impacted on the potential milk yield from grazing, which has fallen by 3 litres to M+ 9.2 litres per day.

Although the average potential milk yield from grazing has fallen to M+ 9.2 litres there is a large range in the data from -8.4 to 25.8 suggesting a large range in grass availabilities, it will therefore be important to assess the situation on individual farms to ensure that supplementary feeding is correct and objectives are achieved

Summary by Steve Brown, Report Supplied by Trouw Nutrition

Download Full Report: Grass Watch 27th June 2016

Grass Watch May 2016

Grass Watch 13th June 2016

Grass Watch report for 13th June 2016

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Grass growth has continued to fall, dropping to an average this week of 65kg DM/ha/day, down 14kg DM/ha/day from last week.

Monitoring grass supply closely continues to be important to ensure potential shortfalls are identified as early as possible and adjustments to the rotation and supplementation can be made.

However, at present grazing availability is holding up and predicted milk yield from grazing has stayed similar to last week at M+ 14.9 litres.

This is associated with similar dry matter (18.6%) and ME (11.6 MJ/kg DM) but the average crude protein content of the grass samples this week has increased from 20.77% last week to 22.10%, this is slightly higher than the 6 year average of 21.27%.

The temperature and humidity index has increased this week to 71, this is on the borderline of high stress. If the current temperatures and humidity levels continue there is the potential to impact on aspects such as DMI, fertility and milk constituents.

Interestingly the higher heat stress value may be a factor in an increasingly reported issue on some farms where higher milk freezing point depression values (values closer to 0oc) are leading to milk rejection on the grounds of ‘water’ addition.

This can be a particular problem with cows at grazing that have a limited access to water causing dehydration, and then rapidly rehydrating when water access becomes available.

Summary by Steve Brown, Report Supplied by Trouw Nutrition

Download Full Report: Grass Watch 230616

Grass Watch May 2016

Grass Watch Report – June 2016

Grass Watch report for 3rd June 2016

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Grass growth has started to slow, falling 21kg DM/ha/day to an average of 79kg DM/ha/day.

Declining growth rates will mean that it will be important to monitor grass supply closely to ensure potential shortfalls are identified as early as possible as the summer progresses.

We are fast approaching the summer solstice and daylight hours are still increasing leading to an increase in the potential grazing hours available.

Predicted grass DMI has risen by 1.8kg DM/day to 13.5kg DM.

This has underpinned an increase in the potential milk yield from grazing, from M+ 10.8 litres/day last week to M+ 14.9 litres/day this week. This is driven by grass availability and grazing hours in daylight as grass quality is lower than the seasons average with ME at only 11.4 MJ/kgDM.

The higher NDF content and NutriOpt Fibre Index will help support butterfat.

The average crude protein content of the grass samples sent into the Trouw Nutrition GB lab has fallen slightly from last week to 20.77%, which is close to the 6 year average of 20.94% for this time of year.

Summary by Steve Brown, Report Supplied by Trouw Nutrition

Download Full Report: Grass Watch 030616

Grass Watch May 2016

Grass Watch – May 2016

Grass Watch Update for Week Commencing 13th May 2016

The improved temperatures this week have increased average grass growth rate, which has accelerated to 81 kg DM/ha/day up 40 kg DM/ha/day from last week. The increased temperatures have also seen the temperature humidity index increase to 71, this is the upper limit for mild heat stress.

A combination of a reduction in the average Dry Matter from 21.3 % to 19.3 % and average Est ME from 12.01 MJ/Kg DM to 11.83 MJ/kg DM this week has seen the potential milk yield from grazing fall by 4.2 litres per day down to M+11.6 litres.

This highlights the influence that changes in grass dry matter has on bite dry matter weight, intake and ultimately potential milk yield from grazing. The falling ME also highlights that close attention should be given to silage crops and cutting date to strike a balance between both yield and quality.

This week’s Crude Protein level at 21.1% continues to remain lower in comparison to last year at 22.4% and the 6 year average of 23.5%. This may reflect alterations in normal fertiliser applications due to the challenging conditions experienced over the last few months.

Download Grass Watch Update (pdf).

Supplied by Trouw Nutrition

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