Grass productivity has not been at its best this spring here in Gloucestershire. However, official figures suggest productivity is only down by 5% compared to 2019 (week ending 7th May.)
Since then the variation appears to have increased with lack of rainfall being the main reason why.
Cut grass weighing 100 kg will contain circa 85 kg of water. That water is essential to carry fertiliser into the plant and along with sunlight and warmth caters for the production of sugars and hence allows for productivity.
To capitalise on grass productivity numerous cuts are made with fertiliser being applied after each. This fertiliser can be inorganic or organic in nature. The plant really does not mind!
A 6% DM slurry application of 50 m3/ha could supply 60 kg of N, 30 kg of P and 140 kg of K along with a useful amount of sulphur.
That should be plenty of nutrition for further growth and another cut.
These photographs show just that, the result of slurry applied to the aftermath of a silage cut and the resultant growth thereafter.
You don’t need to keep buying more fertiliser!
The four photographs.
1) Field A in April
2) Field A in July following slurry application
3) Field A showing restricted grass growth as a result of tanker wheeling’s
4) Field A showing slurry deposition in the base of the crop (the 6% DM content.)