Sand Bedding for dairy cows

Hard bedding has a negative effect on the time of the cow to lie down and get up to go to the feeder and drinker also it is a stressor for cows that may mechanically cause joint pad inflammation. Comparison and cost of using sand / straw / rubber mats becomes important for cows and farmers before making decision. Cow litter materials and costs for stall beddings are:

Sand as inorganic bedding material

As a cow bedding sand is preferred because of its soft and non-microbial inorganic structure. Sand considered the “gold standard” for US farmers. Clean bedding means : “less mastitis, less milk loss, less flies, less foot disease, less somatic cells and less total bacteria” . Various scientific studies have been carried out to ensure that the material in the bedding is inorganic sand animal litter. Each bedding material has advantages and disadvantages.

Table 3 Bacterial growth examined source Godden et al 2008

Bedding materials 0-72hK. Pneumoniae (cfu /ml)E. faecium (cfu/ml)pHC (%)N (%)
Clean sand1.07a-1.65a8.15A0.28A0.01A
Recycled sand1.91b0.27b8.37B1.13B0.04A
Digested solids3.16c0.09b8.90C46.22C1.99B
Savings1.44a-4.50c4.27D53.02D0.35C
Table 3 Bacterial growth examined : source Godden et al ( 2008)

a-;Different superscripts indicate a significant difference (p<0.05) in bacterial growth amid bedding types at an incubation period of 72h.
A-CDifferent superscripts indicate a significant difference (p<0.05) in biochemical characteristics amid bedding types.

Sand has a positive influence on the production of dairy cows because

  • Provides a comfortable lying surface, which enhances overall cow health because of the following findings
  • The inorganic characteristic of sand reduces risk of mastitis caused by bacteria in the bedding material, and therefore production losses are less compared to other bedding materials.
  • Increased lying time:
    • increases rumination and blood flow to udder, which enhances milk production.
    • Decreases stress hormone release, which improves overall health and well‐being of the cow, and increases production.
    • Reduces stress on feet, and thus reduces the risk of lameness and the prevalence of claw lesions.
    • Soft and cushioned (sand, straw or deep‐bedded sawdust) bedding increases recovery from lameness and other health problems, and therefore production.

Advantages of using sand bedding

  • Sand as cow litter materials it takes the shape of the cow’s body and its physical structure. In hot conditions
  • Lower bacterial levels and less mastitis due to environmental organisms such as E-coli and streptococci.
  • Since it is an In-Organic material, the growth of bacteria is low. However, it should be taken into account that it has an important role in the spread of infections with its effect on hygiene in milking parlors.
  • The loose sand on the walkways creates a better and more gripping  with the added friction. Cow slippage can reduce in hot conditions. Provides better slip resistance.
  • Less claw trimming is necessary because provides homogeneous nail wear.
  • Sand is a good material for quick drainage.
  • Cows in the sand are clean, especially the udder area looks very clean and healthy. Clean animals Dirt score 1-2

Disadvantages of using sand bedding

  • It creates problems at low temperatures due to its poor insulation properties.
    • Sand (more or less) always contains a certain amount of moisture.
    • In cold conditions, sand freezes, hardens, and becomes “sharp like a knife.” Cows don’t want to lie down in these cold and wet conditions.
    • Loss of energy and (decreased lying periods) cause a decrease in milk yield.
  • The bedding sand should be leveled daily with a rake to keep comfortable for the cows.
  • The sand must have a maximum granule size of 2 mm.
  • The sand should not contain small, large or sharp stones. Especially small and sharp stones can get into their nails and sting.
  • Sand can stick to the cow’s udder and it may not be easy to get rid of.
  • It is important to clear all paths inside and outside of the barn, otherwise sand dunes will form
  • Low-quality sand contains stones, which settle between the nails and injure the legs of animals.
  • The stones in the sand get under the rubber mats and lift them. With the next wash, more dirt and sand gets under it, which increases the problem.
  • Slip and fall increases due to the remaining sand on the walkways.
  • Combination with slatted floors is not possible.

Sand use and management

  • Sand is a material that MUST BE MANAGED VERY WELL and is a major factor in cost.
  • Cows scratching the sand is one of the leading causes of sand loss. 
  • Old tires are placed in bed pits in the US to reduce daily sand loss (but not a convincing solution).

The deep stall pit should completely fill with sand . Sand height should be at least 45-60 cm.

  • Excess moisture sludges and cools the sand bedding.
  • Too dry sand will fly as dust. Eye irritation and Pnomeniya increase.
  • Every day sand should be leveled and corrected between milking times at least 2-3 times. Otherwise, the bedding area will be hollow.

Every 1 cm of less sand = 11 minutes less lying time..

In order to compensate for the reduced sand at stalls, +1.5 cm, 25 kg of sand per animal per day should be added to the bedding. This means extra work, labor, vehicle expenses and materials.

KUM ve malzemeli derin durak ölçüleri

Cost of sand using

If we assume that this used sand material is recovered from 80% recycling! The reserve, which will meet the need for an additional 2 tons of sand and 25 tons of water (8+17= 25-€) per animal annually, must be obtained on site or within 3 km.

Calculations show: Per animal per year with 9 tons of sand approximately 3-€. The cost of sand management found to be 4- €/ animal. 110 tons of water per animal per year for washing sand and cleaning with water used; operating cost: 0,68 €/ton

The daily sand operating cost is calculated as 0.09-€/cow.

Applications and references

One of the exemplary leading farm which is a sand animal litter user in Turkey, is is ACIPAYAM ATASANCAK tarım işletmesi agricultural enterprise. In the farm where 950 cows are milked; 9,000 tons of water and 600 tons of sand are used daily. While 85% of the water and 80% of the sand used provide an economic contribution with the recycling system, it does not have a negative impact on the environment. 2014

ATASANCAK TARIM İŞETMESİ DATAS

Investments costs of sand bedding

Advantages
  • In terms of economy, the initial investment cost of sand bedding is relatively low.
  • Construction cost of deep bedding stall is 60-80 € cheaper than elevated stalls .
    • Since the need for 9 square meters of 30 m3 concrete for the foundation construction of the elevated stall is eliminated.
  • For the first filling, 1/2 m3 (average 500 kg) of bedding sand per animal is sufficient. (first sand 6.2-€/tone)
  • With operating costs of 8 to 10 €/tones of sand
    • compared to organic bedding $40 to $50 per tone lower.
Constrains
  • Sand distribution vehicle (20 tons) cost 20-25.000€/unit
  • Sand separation settling pond need ( manure / water / Sand)
  • A sieve, regeneration and recycling system is required.
  • Scrapers and manure pits will require expensive technology vehicles.
  • A special filter system is required for reuse of sand, separating manure.
  • If there is plenty of water in the flushing system, the sand will be moistened and cleaned.
  • The structural feature of the sand is very abrasive, the concrete layer needs to be thicker in the cleaning methods with the flushing system.
  • Annual concrete floor wear cost should be considered (depreciation)
  • Barn equipment, pumps, Scraper systems, etc. will soon wear out due to high wear!! 
  • Sand will also cause the parlor equipment to wear out, and  break down more frequently.

SAND Process

The floor sub mat POLSTA is used to reduce daily liter sand, straw, sawdust need and increase softness.

Calculations show: Per animal/ year with 9 tons of sand approximately 3-€. The cost of sand management found to be 4- €/ animal. 110 tons of water per animal per year for washing sand and cleaning with water used; operating cost: 0,68 €/ton. LİNK

The farms use sand generally do not use scrapers. sand has a very high abrasive effect on scrapers, all machinery, equipment and concrete. If a scraper is to be used, it must be special and rubber lipped. For this reason, it is generally cleaned by flushing system.

Vacuum cleans the alley in one pass, allowing more time to properly fill and groom freestall bedding. Minimized time in they alleyway means reduced wear and tear on equipment. In efficiency tests, Manure Vacuum was able to clean a 330 cow group (on 3x milking) in less than 10 minutes – including unloading! the Manure Vacuum replaces the need for pumps, augers, and concrete channels to transport manure from the barn to the storage lagoon or process facility.

  • Expensive technology manure disposal system is required.
    • Expensive technology vehicles will be required for manure lagoons.
  • Sand leveling tool and apparatus tractors
  • Sand dispersing and distribution vehicles truck and apparatus
  • High cost cleaning system
    • Vacuum cleaning
      • vehicles are expensive equipment
      • Fuel, spare parts, maintenance nd high running cost
    • Flushing system cleaning.
      • The required infrastructure investment is very high and requires high maintenance cost.
      • High volume water use and resources need.
      • Large volumes of water capacity water tanks and engines are needed.
  • Special strainer system is required for reuse and recycling  of sand, separating manure and sand.
    • Sedimentation ponds and lagoons are required for separation as the manure mixes with the sand.
  • The structural feature of the sand is very abrasive;
    • C30 concrete wear an average of 4 cm of in 10 years. so the concrete layers need to be thicker
    • Barn equipment, systems, pump, etc. will soon wear out due to high wear!
    • Equipment wearing parts will need to be replaced.
    • Sand will also cause wear on the milking equipment.
  • Bio-gas and energy production is not possible unless sand is separated from the manure.
  • Sawdust and similar substances should not be used.
  • Combination with slatted floors is not possible

Referances https://www.mclanahan.com/blog/doing-these-3-things-will-allow-you-to-maximize-your-sand-bedding

From an economic point of view, sand is not economically positive as a bedding material

  • Cows throw an average of 20 to 25 kg of sand out of bedding per day from each stall
    • in order to compensate for the reduced sand at the stalls. require additional. 10-25 kg for each cow per day
    • This means more work, labor and materials.
    • In order to reduce daily SAND loss, put old tires or rubber mats but not a reliable solution.
      • “USED OLD TIRE” is defined as HAZARDOUS WASTE according to Waste regulation
  • Bio-gas and energy production is not possible unless sand is separated from the manure.
  • A detailed and specific manure system is required.
  • Extra wear and tear resistant equipment can cost more than the savings described above.
  • Many manufacturers claim that the straw material is inexpensive, free and readily available.
    • With $40 per tone, the price will be quite variable depending on seasonal and economic conditions, although straw is free, its actual price and storage costs can be quite high.
ChapterAdvantagesConstrains
Sand-Comfort
-inorganic
-Dry
-Cool
-Traction
-Heavy
-Freezes in cold weather
-Labour intensive
Cost-Cheap if readily available
-Financial cost can be recouped
by well managed investment
-More expensive in areas
further from beaches and rivers
-Cost dependent of lorry transport
Housing-Soft bedding
-Sand on concrete increases grip
-Reusable if recycled
-Manure handling
-Wearing of machinery
-Recycling is expensive
Behavior-Laying times > 12 hours
-Standing times < 2 hours
-Sand provides cushioning and
traction for rising and laying down
-Increased walking behavior
Increased feeding and drinking
-Less stress
-Each 1 cm less sand= -11
minutes less laying time
-Cows digging = loss of sand
Health-Significantly less
environmental mastitis
-Lover bacteria counts in bedding
-50% less coliform bacteria compared
to saw dust in teat swabs
-85% less Klebsiella compared
to saw dust in teat swabs
-42% less lameness
-75% less hock abrasions
-Sand can be abrasive if the layer is too thin
-More lesions on dorsal tuber calcis
Production-Increased laying times
-Increased rumination + increased blood flow
-Less stress = More production
-Lame cows recover faster ( less production loss)
Takes time for cows get used to sand
Slightly production loss possible during
transition possible
Legislation-Solid floor is low NH3 emission system
-Improved housing is a part of regulation
to improve dairy cow welfare
Legislation due to change about
spreading waste on fields
EthicsSand approved by both utilitarian and
deontological views for providing cow
good comfort and improved health
Potential for sand to be marketed as
high welfare and mislead public as to poor
management practices
Concluding Table

Bedding materials and liters comparison: Sand/ straw / Rubber mat

Straw cow bedding littering

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inek altlıkları inek yatağı sap saman inek altlık malzemeleri

Cost comparisons of deep straw beddings / elevated rubber mattress and KRAIBURG

Cost of Deep stall with straw littering

Straw260kg/ cow30-€ /ton7,80-€
Lime260kg/ cow35-€ /ton9,10-€
Loading & removing10 min/ cow12-€/ h2,00-€
Distribution20 min/ cow12-€/ h4,00-€
Maintenance & Leveling245 min/cow12-€/ h49,00-€
ANNUAL COST                      71,90 €  

Cost of ELEVATED stall with rubber mat

RUBBER Mats*8 years life170 Euro/stall21,25 €
Fine chopped straw40 kg/a0,18-Euro/kg  7,20 €
Saw dust (alternative)0,53 M3/a8-Euro/M34,25 €
Straw10 min/ cow12-Euro/h2,00 €
Maintenance60-90 min/cow12-Euro/h18,00 €
ANNUAL COST48,45 €
*KRAIBURG laying mats warranties are 10 years but life span is quite longer.

Sources: Heidenreich Thomas, oral presentation at LFL saxonia, Köllitsch,Germany 2007

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