Friday, 17 May 2019 09:07

Wintering practices are critical

Written by  Bala Tikkisetty, sustainable agriculture advisor at Waikato Regional Council
Bala Tikkisetty. Bala Tikkisetty.

Soil damage during winter is a big issue for farmers. It coincides with high stock densities and high soil moisture conditions.

Stock wintering systems play a major role in water quality and soil health, because stock are then grazing during a time of much hydrological activity that moves contaminants off land and into nearby waterbodies. 

General practice during winter is to graze stock intensively on winter forage crops supplying large quantities of feed in a relatively small area. 

Now is the right time for farmers to consider the impact of stock wintering practices. These can impact surface and ground water quality and soil quality due to heavy concentrations of dung and urine, the creation of bare ground and the risk of run-off in wet weather. Many studies have shown that water quality guidelines and standards have been exceeded as a result of intensive agricultural activities.

Here are some stock wintering options that can achieve good environmental results, are animal-friendly and make economic sense.

Feed and stand-off pads protect soil physical structure in wet weather. The feed pad is a dedicated concrete platform where supplementary feeds are brought to the stock. It has higher feed efficiency, reducing wastage to about 5% versus 20% or more when silage is fed in paddocks.

Stand-off pads are a dedicated loafing area for stock. These have a softer, free-draining surface of, say, wood chips. As stock can be withheld from pasture for longer times, the area required per cow has to be bigger, say, about 8m2. Capture of effluent is an important aspect of stand-off pads. It requires the base to be sealed underneath, either with compacted clay or an artificial liner or concrete, and the captured effluent directed to a treatment system.

Animal shelters are gaining popularity. Herd homes are a combination of a feeding platform, stand-off facility and animal shelter. Sheltered feeding areas have concrete floor slats through which cow effluent drops into a concrete-lined bunker.

Composting barns are another stock wintering option, with the composting occurring in situ. The cows roam freely in the barn and lie on a mix of wood chips and straw. The beds must be kept dry by adequate ventilation and aeration.

In the past, sacrifice paddocks have been used when other options were not available to stand animals off or feed supplements when it is very wet. However, there is a risk of soil structure damage and animal health problems such as lameness and mastitis. 

If soil potassium levels rise too high (potassium is excreted in urine) it may predispose the calving cow to metabolic problems. These paddocks come with a very high risk of discharges of contaminants to water, so they must be sited well away from waterways, with an area of rank growth to trap any sediment or dung that washes off. 

Build your wintering structure well away from waterways and allow for solid and liquid waste disposal into your effluent disposal system. Don’t use supplementary feeds in areas where run-off may reach any waterbody. 

By planning now and implementing proper stock wintering management practices, you can play an important part in improving water quality and soil health. 

• Bala Tikkisetty is a sustainable agriculture advisor at Waikato Regional Council. Contact him on 0800 800 401.

More like this

$52,500 fine for effluent mismanagement

A Taupiri farming company has been convicted and fined $52,500 in the Hamilton District Court for the unlawful discharge of dairy effluent into the environment.

Save soil - take a pledge this 'world soils day'

OPINION: Soil is one of the most valuable assets that a farmer has. It is our collective responsibility to make use of soils without damaging either the soil or any other part of our environment, protecting them for our own use and use by future generations.

Featured

Australia develops first local mRNA FMD vaccine

Foot and Mouth Disease outbreaks could have a detrimental impact on any country's rural sector, as seen in the United Kingdom's 2000 outbreak that saw the compulsory slaughter of over six million animals.

NZ household food waste falls again

Kiwis are wasting less of their food than they were two years ago, and this has been enough to push New Zealand’s total household food waste bill lower, the 2025 Rabobank KiwiHarvest Food Waste survey has found.

Editorial: No joking matter

OPINION: Sir Lockwood Smith has clearly and succinctly defined what academic freedom is all about, the boundaries around it and the responsibility that goes with this privilege.

National

All eyes on NZ milk supply

All eyes are on milk production in New Zealand and its impact on global dairy prices in the coming months.

Machinery & Products

Leader balers arrive in NZ

Officially launched at the National Fieldays event in June, the Leader in-line conventional PRO 1900 balers are imported and distributed…

JDLink Boost for NZ farms

Connectivity is widely recognised as one of the biggest challenges facing farmers, but it is now being overcome through the…

New generation Defender HD11

The all-new 2026 Can-Am Defender HD11 looks likely to raise the bar in the highly competitive side-by-side category.

» Latest Print Issues Online

Milking It

Full cabinet

OPINION: Legislation being drafted to bring back the controversial trade of live animal exports by sea is getting stuck in the…

» Connect with Dairy News

» eNewsletter

Subscribe to our weekly newsletter