Deep litter

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Pigs kept on deep-litter material Deep-litter.JPG
Pigs kept on deep-litter material

Deep litter is an animal housing system, based on the repeated spreading of straw or sawdust material in indoor booths. [1] An initial layer of litter is spread for the animals to use for bedding material and to defecate in, and as the litter is soiled, new layers of litter are continuously added by the farmer. [2] In this fashion, a deep litter bedding can build up to depths of 1–2 meters. [3] "The usual procedure for built-up floor litter is to start with about 4 inches (100 mm) of fine litter material with additions of 1 to 2 inches (25 to 50 mm) later as needed without removal of the old. A depth of 6 to 12 inches (150 to 300 mm) is maintained by partial removals from time to time." [4] Many consider this to be a natural means to disposing of animal feces. "The deep litter cultivation is a modern ecological breeding technique based on decomposing feces by microbiological methods, a post processing method for poultry Manure." [5]

Contents

History

The deep litter method was first used in 1946 by the Ohio Station Brooder House. Before the deep litter method, shavings were removed every one to two weeks, in order to avoid dampness and coccidia. Later, it was discovered that deep litter provides adequate protection from these naturally. The deeper litter provides extra insulation in colder temperatures, as well as extra heat from the decomposition of the litter. Another potential benefit is that when raised under conditions that don't provide adequate nutrition, deep litter poultry is healthier than poultry raised in the traditional method of housing. "By not removing the waste, good microbes come and make their homes in the litter. These microbes actually eat and break down the feces and consume unhealthy bacteria, leaving good bacteria behind." [1]

Benefits

Numerous benefits have been discovered with the use of the deep litter system, also called the "build-up method". One is the increased ability of poultry to fight off coccidia, common bacteria responsible for an average of a 20% death rate of poultry. New studies in Ohio have shown death rates from coccidia as low as 2.9%. As many as 6 successive broods of chicks have been raised on the same litter, each brood showing better results. Chickens raised in this environment have also been less inclined to show cannibalistic traits. [4]

Many studies have been done in order to research potential advantages and disadvantages of the deep litter system. This research covers multiple types of livestock including poultry, swine, duck, and cattle.

"The first experimental evidence with reference to the user of built-up litter as a sanitary procedure was secured by the Ohio Station in 1946 when it was first used in the brooder house. During the three years previous when the floor litter was removed and renewed at frequent intervals, the average mortality of 10 broods, or a total of 18,000 chicks, was 19 percent. During the succeeding three years with the use of built-up litter, the average mortality of 11 broods, or a total of 10,000 chicks, was 7 percent. Seldom did a brood escape an attack of coccidiosis before the use of built-up litter. Afterward there was no noticeable trouble from coccidiosis in 11 consecutive broods started and raised on the same old built-up floor litter. Old built-up litter is floor litter which has been used by two or more previous broods of chicks." [4] To build immunity against coccidia, chicks are normally vaccinated. Experiments have shown that deep litter is an effective method of exposing chicks to the bacteria at a safe rate. Chicken feces produces ammonia which is known for killing coccidia. "A 10 percent solution of ammonia spray is considered effective for killing coccidia. Being unable to withstand such a spray, they may likewise be unable to withstand the constant ammoniacal atmosphere in built-up litter." [4]

Experiments have shown major potential benefits to utilizing the deep litter method, specifically within piggeries. Pigs raised in a deep litter system, do significantly better than pigs raised under similar conditions, on a concrete floor, which is the traditional method. Studies have shown that pigs raised in a deep litter system have a lower feed to gain ratio, produce a higher quality of pork, create a significantly lower amount of gaseous emissions, show improvements in odor nuisance reduction, and have better animal welfare. "Pigs in the deep litter system had greater color score and rate of cooking meat, while they had lower drip loss and cooking loss than loins from concrete-floor system housed pigs." (ZHOU et al. 426) [6] "Results indicate that pigs raised in the deep-litter system had some animal welfare improvements and an odor nuisance reduction; in the meantime, pork quality also improved from the deep-litter system compared to the pigs housed in the concrete-floor system." (ZHOU, abstract) [6] Gaseous emissions were also lower within the deep litter system when compared to traditional systems. "NH3 concentration in the deep-litter system was significantly lower than that in the concrete-floor system" (ZHOU et al. 425) [6] "Deep litter and outdoor production avoids the large quantities of methane normally generated from effluent ponds in conventional piggeries". [7] This study helped to prove numerous benefits not only to our atmosphere, but to the health and animal welfare of the pigs.

Negative effects

A study was conducted to determine the effects on the reproductive system caused by different living styles, for poultry. The deep litter system provided lower efficiency in terms of reproduction, and an increase of food intake. "Feed intake was lower (p < 0.05) in legumes and green pasture than deep litter suggesting economic benefit. It was concluded that access to legumes enhanced the performance of layers compared to deep litter and green pasture as indicated by the parameters measured." (Oke, Abstract) [8] This particular study determined that the deep litter method was not beneficial in terms of egg layer production in chickens.

A study was conducted in three intensive duck farms in China that utilised routine prophylactic antibiotics. This attempted to determine the ability for antibiotic resistant bacteria, to accumulate in meat duck deep litter where the ducks would subsequently excrete the antibiotics and heavy metals from growth promoters and feeds into the litter. Levels were measured at 3 different stages of duck life, in 3 different barns. The litter contained high levels of antibiotics and heavy metals that corresponded to the antibiotics, feed and supplements that the ducks received throughout their growth cycle. "E. coli isolated from the 3 stages of sampling were highly resistant to ampicillin, tetracycline, florfenicol, and doxycycline. Increased resistance to ceftiofur, enrofloxacin, ofloxacin, and gentamicin were seen in the isolates from the final stage of deep litter." (Linn, Abstract) [9] This study concluded that "deep litter could be suitable for the evolution of bacterial antibiotic-resistance under conditions of continuous usage or accumulation of antibiotics and heavy metals without proper management." (Linn, Abstract) [9] This paper highlights the risk of introducing the routine use of antibiotics, growth promoting supplements and pesticides rather than a direct contribution of deep litter systems. This paper did not utilise a control environment that avoided growth promoters or routine antibiotics.

Problems may arise from the deep litter method such as rotten bed. This occurs mostly in piggeries, and is caused by high levels of water intake and discharge from the animals, as well as discharging in the same location within the pen. The build-up of moisture cannot be absorbed quickly enough to fully decompose and causes rotting, unpleasant odors, and harmful gases. Experiments to solve this problem have taken place. One process, is called the heat pulse method. This method, refers to heating the bedding at a constant temperature, which causes a buildup of steam beneath the bedding. However, the steam is unable to release itself, so the next step is to pulse oxygen into the bedding, allowing the steam to escape. "The pulse method could promote the timely discharge of steam generated inside the bedding." (Li, 1412) [5]

Innovations

This type of farming has created a new market for sheds specifically designed to utilize the deep litter method. Companies are realizing that this method has multiple benefits and is being accepted by various governments as a greener method of farming. "It has won the support of the government and acceptance of market." (QIN, 1) [10] One type of building being constructed is called the removable deep litter breeding shed. It consists of larger areas for the animals, space to let the litter build to heights not allowed by traditional housing, and economic costs compared to traditional sheds. "Successful exploiture of breeding supporting facilities will greatly promote the development of deep-litter breeding technology in local farms." (QIN, 1) [10]

Related Research Articles

<span class="mw-page-title-main">Coprophagia</span> Consumption of feces

Coprophagia or coprophagy is the consumption of feces. The word is derived from the Ancient Greek κόπρος kópros "feces" and φαγεῖν phageîn "to eat". Coprophagy refers to many kinds of feces-eating, including eating feces of other species (heterospecifics), of other individuals (allocoprophagy), or one's own (autocoprophagy) – those once deposited or taken directly from the anus.

<span class="mw-page-title-main">Polyface Farm</span> Farm in Swoope, Virginia

Polyface Farm is a farm located in rural Swoope, Virginia, run by Joel Salatin and his family. The farm is driven using unconventional methods with the goal of "emotionally, economically and environmentally enhancing agriculture". This farm is where Salatin developed and put into practice many of his most significant agricultural methods. These include direct marketing of meats and produce to consumers, pastured-poultry, grass-fed beef and the rotation method which makes his farm more like an ecological system than conventional farming. Polyface Farm operates a farm store on-site where consumers go to pick up their products.

<span class="mw-page-title-main">Debeaking</span> Trimming of a birds beak, usually performed on domesticated birds

Debeaking, beak trimming, or beak conditioning is the partial removal of the beak of poultry, especially layer hens and turkeys although it may also be performed on quail and ducks. Most commonly, the beak is shortened permanently, although regrowth can occur. The trimmed lower beak is somewhat longer than the upper beak. A similar but separate practice, usually performed by an avian veterinarian or an experienced birdkeeper, involves clipping, filing or sanding the beaks of captive birds for health purposes – in order to correct or temporarily to alleviate overgrowths or deformities and better allow the bird to go about its normal feeding and preening activities. Amongst raptor-keepers, this practice is commonly known as "coping".

<span class="mw-page-title-main">Animal husbandry</span> Management, selective breeding, and care of farm animals by humans

Animal husbandry is the branch of agriculture concerned with animals that are raised for meat, fibre, milk, or other products. It includes day-to-day care, selective breeding, and the raising of livestock. Husbandry has a long history, starting with the Neolithic Revolution when animals were first domesticated, from around 13,000 BC onwards, predating farming of the first crops. By the time of early civilisations such as ancient Egypt, cattle, sheep, goats, and pigs were being raised on farms.

<span class="mw-page-title-main">Free range</span> Method of farming where animals can roam freely outdoors

Free range denotes a method of farming husbandry where the animals, for at least part of the day, can roam freely outdoors, rather than being confined in an enclosure for 24 hours each day. On many farms, the outdoors ranging area is fenced, thereby technically making this an enclosure, however, free range systems usually offer the opportunity for the extensive locomotion and sunlight that is otherwise prevented by indoor housing systems. Free range may apply to meat, eggs or dairy farming.

Coccidiosis is a parasitic disease of the intestinal tract of animals caused by coccidian protozoa. The disease spreads from one animal to another by contact with infected feces or ingestion of infected tissue. Diarrhea, which may become bloody in severe cases, is the primary symptom. Most animals infected with coccidia are asymptomatic, but young or immunocompromised animals may suffer severe symptoms and death.

<span class="mw-page-title-main">Chicken as food</span> Type of meat

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<span class="mw-page-title-main">Poultry litter</span> Mixture of chickens excretions, feed, feathers and bedding

In agriculture, poultry litter or broiler litter is a mixture of poultry excreta, spilled feed, feathers, and material used as bedding in poultry operations. This term is also used to refer to unused bedding materials. Poultry litter is used in confinement buildings used for raising broilers, turkeys and other birds. Common bedding materials include wood shavings, sawdust, peanut hulls, shredded sugar cane, straw, and other dry, absorbent, low-cost organic materials. Sand is also occasionally used as bedding. The bedding materials help absorb moisture, limiting the production of ammonia and harmful pathogens. The materials used for bedding can also have a significant impact on carcass quality and bird performance.

<span class="mw-page-title-main">Perdue Farms</span> American meat processing company

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<span class="mw-page-title-main">Organic egg production</span>

Organic egg production is the production of eggs through organic means. In this process, the poultry are fed organic feed. According to the United States Department of Agriculture, organic means that the laying hens must have access to the outdoors and cannot be raised in cages. Only natural molting can occur within the flock; forced molting is not allowed. Organic certification also requires maintenance of basic animal welfare standards.

<span class="mw-page-title-main">Intensive animal farming</span> Branch of agriculture

Intensive animal farming, industrial livestock production, and macro-farms, also known by opponents as factory farming, is a type of intensive agriculture, specifically an approach to animal husbandry designed to maximize production, while minimizing costs. To achieve this, agribusinesses keep livestock such as cattle, poultry, and fish at high stocking densities, at large scale, and using modern machinery, biotechnology, and global trade. The main products of this industry are meat, milk and eggs for human consumption. There are issues regarding whether intensive animal farming is sustainable in the social long-run given its costs in resources. Analysts also raise issues about its ethics.

<span class="mw-page-title-main">Yarding</span> Provision of a fenced yard in poultry keeping

In poultry keeping, yarding is the practice of providing the poultry with a fenced yard in addition to a poultry house. Movable yarding is a form of managed intensive grazing.

<span class="mw-page-title-main">Poultry farming</span> Part of animal husbandry

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<span class="mw-page-title-main">Pig farming</span> Raising and breeding of domestic pigs

Pig farming or pork farming or hog farming is the raising and breeding of domestic pigs as livestock, and is a branch of animal husbandry. Pigs are farmed principally for food and skins.

Keeping chickens as pets, for eggs, meat, or for eating pests is popular in urban and suburban areas. Some people sell the eggs for side income.

<span class="mw-page-title-main">Manure</span> Organic matter, mostly derived from animal feces, which can be used as fertilizer

Manure is organic matter that is used as organic fertilizer in agriculture. Most manure consists of animal feces; other sources include compost and green manure. Manures contribute to the fertility of soil by adding organic matter and nutrients, such as nitrogen, that are utilised by bacteria, fungi and other organisms in the soil. Higher organisms then feed on the fungi and bacteria in a chain of life that comprises the soil food web.

<span class="mw-page-title-main">Assured Food Standards</span> Owner of the Red Tractor quality mark in the United Kingdom

Assured Food Standards is a United Kingdom company which licenses the Red Tractor quality mark, a farm assurance programme for food products, animal feed and fertiliser. The scheme is subject to frequent media scrutiny because of the systematic and routine animal abuse that happens at Red Tractor assured farms and is permitted under Red Tractor standards.

<span class="mw-page-title-main">Antibiotic use in livestock</span> Use of antibiotics for any purpose in the husbandry of livestock

Antibiotic use in livestock is the use of antibiotics for any purpose in the husbandry of livestock, which includes treatment when ill (therapeutic), treatment of a group of animals when at least one is diagnosed with clinical infection (metaphylaxis), and preventative treatment (prophylaxis). Antibiotics are an important tool to treat animal as well as human disease, safeguard animal health and welfare, and support food safety. However, used irresponsibly, this may lead to antibiotic resistance which may impact human, animal and environmental health.

Risk assessment for organic swine health is the process of evaluating the likelihood and potential impact of various factors that may affect the health and well-being of organic swine. Risks associated with organic swine farming may differ to those associated with non-organic swine farming, and is of increasing relevance due to growth in the sector. While organic swine farming makes up a small share of U.S. swine farming overall, numbers have increased significantly in recent years. Additionally, non-certified organic swine herds are not accounted in official statistics. Consumer demand, stemming from the larger organic agriculture movement has helped spur growth in this industry.

Antibiotic use in the United States poultry farming industry is the controversial prophylactic use of antibiotics in the country's poultry farming industry. It differs from the common practice in Europe, where antibiotics for growth promotion were disallowed in the 1950s.

References

  1. 1 2 Natural Chicken Keeping. "Deep Litter Method" . Retrieved 22 February 2017.
  2. Mormino, Kathy (30 October 2013). "The Deep Litter Method of Waste Management in Chicken Coops" . Retrieved 22 February 2017.
  3. Groenestein & Van Faassen, 1996 - Volatilization of Ammonia, Nitrous Oxide and Nitric Oxide in Deep-litter Systems for Fattening Pigs. J. agric. Engng Res. vol. 65, pp269 – 274
  4. 1 2 3 4 Plamondon, Robert (28 September 2016). "Deep Litter in Chicken Coops" . Retrieved 20 February 2017.
  5. 1 2 Li, Hui (2014). "Design Of Moisture Control System For Beddings Of Deep-Litter". Agricultural Science & Technology via Academic Search Premier.
  6. 1 2 3 Zhou, Chuanshe; et al. (2015). "Gaseous Emissions, Growth Performance And Pork Quality Of Pigs Housed In Deep-Litter System Compared To Concrete-Floor System". Animal Science Journal. 86 (4): 422–427. doi:10.1111/asj.12311. PMID   25491590 via Academic Search Premier.
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  9. 1 2 Lin, Y; et al. (2016). "Accumulation Of Antibiotics And Heavy Metals In Meat Duck Deep Litter And Their Role In Persistence Of Antibiotic-Resistant Escherichia Coli In Different Flocks On One Duck Farm". Poultry Science. 96 (4): 997–1006. doi: 10.3382/ps/pew368 . PMID   27744296 via MEDLINE.
  10. 1 2 Qin, Zhu (2014). "Reproductive Performance Of Layer Chickens Reared On Deep Litter System With Or Without Access To Grass Or Legume Pasture". Agricultural Science & Technology 15.12 via Academic Search Premier.