Industry-wide approach helps farmers succeed
New Zealand farmers may be faced with increasing business challenges, but at least one sector has their back when it comes to collaborating for the greater good of pastoral agriculture in this country.
Pasture renewal is all about setting yourself up for the future, says Barenbrug pasture systems manager Blair Cotching.
"Farming is changing fast; sowing the right ryegrass is one way to keep up with those changes."
Cotching claims tetraploid ryegrasses 4front, Shogun and Forge aren't just great for cows. They have encouraging environmental features as well, to help future-proof your farm, he says.
And what makes them friendly to both animals, and the environment? The short answer is taste, Cotching says.
"Cows love them: they have juicy leaves, with softer stems, which are very easy to eat. And that applies even when they are a bit longer than what we would say is the best grazing height for diploid ryegrass."
This difference in leaf length before grazing is quite small - only about half a leaf more than diploids.
But it leads to a cascade of potential benefits, starting with more metabolise energy (ME) per hectare, higher cow intakes, and up to 10% more milk per cow.
When every cow generates extra milksolids, because it's so easy for her to eat as much ME as she needs, it then becomes feasible to run fewer cows without sacrificing overall production or income, Cotching says.
"Smaller herds have a smaller footprint. You don't need as many replacements, for example. Animal health, supplement, rearing and other herd costs drop.
"As ryegrass re-grows after grazing, its carbohydrate levels rise, while crude protein and nitrogen content fall.
"So grazing them when they're a bit longer reduces the amount of nitrogen eaten by your cows."
That's good for leaching, Cotching points out. When cows eat more nitrogen than they need, they excrete the surplus in urine or dung. It's this surplus that contributes to leaching.
Being able to leave these tetraploid ryegrasses slightly longer before grazing also means each plant has extra leaf area to capture energy from the sun, Cotching says.
"Think of this as giving the plants bigger solar panels for photosynthesis.
"Again, it's not a huge difference in itself. But when you multiply this effect across thousands of plants in a paddock, it adds up to higher pasture growth.
"Other benefits associated wtih tetraploid pastures include a longer grazing round; more time for the ryegrass plant to respond to nitrogen fertiliser and a proportionally higher nitrogen response."
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