GB2310124A - Microorganisms and their use in treating animal feed and silage - Google Patents
Microorganisms and their use in treating animal feed and silage Download PDFInfo
- Publication number
- GB2310124A GB2310124A GB9703249A GB9703249A GB2310124A GB 2310124 A GB2310124 A GB 2310124A GB 9703249 A GB9703249 A GB 9703249A GB 9703249 A GB9703249 A GB 9703249A GB 2310124 A GB2310124 A GB 2310124A
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- United Kingdom
- Prior art keywords
- silage
- microorganism
- effect
- fermentation
- added
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004460 silage Substances 0.000 title claims description 40
- 244000005700 microbiome Species 0.000 title claims description 18
- 241001465754 Metazoa Species 0.000 title claims description 12
- 238000000855 fermentation Methods 0.000 claims description 26
- 230000004151 fermentation Effects 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 24
- 230000000694 effects Effects 0.000 claims description 18
- 239000000126 substance Substances 0.000 claims description 15
- 230000000845 anti-microbial effect Effects 0.000 claims description 13
- 241000186679 Lactobacillus buchneri Species 0.000 claims description 10
- 240000004808 Saccharomyces cerevisiae Species 0.000 claims description 9
- 244000025254 Cannabis sativa Species 0.000 claims description 8
- 241000894006 Bacteria Species 0.000 claims description 7
- 241000209140 Triticum Species 0.000 claims description 6
- 235000021307 Triticum Nutrition 0.000 claims description 6
- 240000008042 Zea mays Species 0.000 claims description 4
- 235000016383 Zea mays subsp huehuetenangensis Nutrition 0.000 claims description 4
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 4
- 239000004599 antimicrobial Substances 0.000 claims description 4
- 235000009973 maize Nutrition 0.000 claims description 4
- 235000013339 cereals Nutrition 0.000 claims description 3
- 240000005979 Hordeum vulgare Species 0.000 claims description 2
- 235000007340 Hordeum vulgare Nutrition 0.000 claims description 2
- 241000186660 Lactobacillus Species 0.000 claims description 2
- 241001468191 Lactobacillus kefiri Species 0.000 claims description 2
- 241001643449 Lactobacillus parakefiri Species 0.000 claims description 2
- 240000004658 Medicago sativa Species 0.000 claims description 2
- 235000010624 Medicago sativa Nutrition 0.000 claims description 2
- 240000000359 Triticum dicoccon Species 0.000 claims description 2
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 2
- 229930195729 fatty acid Natural products 0.000 claims description 2
- 239000000194 fatty acid Substances 0.000 claims description 2
- 150000004665 fatty acids Chemical class 0.000 claims description 2
- 229940039696 lactobacillus Drugs 0.000 claims description 2
- 241001643453 Lactobacillus parabuchneri Species 0.000 claims 1
- 241000209082 Lolium Species 0.000 claims 1
- 230000000630 rising effect Effects 0.000 claims 1
- 238000002474 experimental method Methods 0.000 description 12
- 230000002401 inhibitory effect Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 239000002054 inoculum Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 108090000790 Enzymes Proteins 0.000 description 5
- 102000004190 Enzymes Human genes 0.000 description 5
- 241000233866 Fungi Species 0.000 description 5
- 238000009472 formulation Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000006228 supernatant Substances 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000004459 forage Substances 0.000 description 3
- 239000004461 grass silage Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 2
- 241000228245 Aspergillus niger Species 0.000 description 2
- 241000304886 Bacilli Species 0.000 description 2
- 241000193830 Bacillus <bacterium> Species 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-M Lactate Chemical compound CC(O)C([O-])=O JVTAAEKCZFNVCJ-UHFFFAOYSA-M 0.000 description 2
- 240000006024 Lactobacillus plantarum Species 0.000 description 2
- 235000013965 Lactobacillus plantarum Nutrition 0.000 description 2
- 235000011054 acetic acid Nutrition 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000011534 incubation Methods 0.000 description 2
- 229940072205 lactobacillus plantarum Drugs 0.000 description 2
- 230000010534 mechanism of action Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- UHPMCKVQTMMPCG-UHFFFAOYSA-N 5,8-dihydroxy-2-methoxy-6-methyl-7-(2-oxopropyl)naphthalene-1,4-dione Chemical compound CC1=C(CC(C)=O)C(O)=C2C(=O)C(OC)=CC(=O)C2=C1O UHPMCKVQTMMPCG-UHFFFAOYSA-N 0.000 description 1
- 239000004382 Amylase Substances 0.000 description 1
- 102000013142 Amylases Human genes 0.000 description 1
- 108010065511 Amylases Proteins 0.000 description 1
- XEZYTQQNJZSCRO-UHFFFAOYSA-N C(C)O.C(CC)(=O)O.C(C)(=O)O.C(C(O)C)(=O)O Chemical compound C(C)O.C(CC)(=O)O.C(C)(=O)O.C(C(O)C)(=O)O XEZYTQQNJZSCRO-UHFFFAOYSA-N 0.000 description 1
- 101710121765 Endo-1,4-beta-xylanase Proteins 0.000 description 1
- 241000223218 Fusarium Species 0.000 description 1
- 241000223221 Fusarium oxysporum Species 0.000 description 1
- 241000186781 Listeria Species 0.000 description 1
- 241000228347 Monascus <ascomycete fungus> Species 0.000 description 1
- 241000235526 Mucor racemosus Species 0.000 description 1
- 241000191996 Pediococcus pentosaceus Species 0.000 description 1
- 240000000064 Penicillium roqueforti Species 0.000 description 1
- 235000002233 Penicillium roqueforti Nutrition 0.000 description 1
- 241000235648 Pichia Species 0.000 description 1
- 241000235645 Pichia kudriavzevii Species 0.000 description 1
- 241000209504 Poaceae Species 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-N Propionic acid Chemical compound CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 1
- 241000282849 Ruminantia Species 0.000 description 1
- 241000159593 Saccharomycopsis selenospora Species 0.000 description 1
- 241000607142 Salmonella Species 0.000 description 1
- 241000282887 Suidae Species 0.000 description 1
- 241000223259 Trichoderma Species 0.000 description 1
- 241000223262 Trichoderma longibrachiatum Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 235000019418 amylase Nutrition 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 239000012228 culture supernatant Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- IJKVHSBPTUYDLN-UHFFFAOYSA-N dihydroxy(oxo)silane Chemical compound O[Si](O)=O IJKVHSBPTUYDLN-UHFFFAOYSA-N 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 108010066429 galactomannanase Proteins 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical class CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000009630 liquid culture Methods 0.000 description 1
- 239000004462 maize silage Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 244000144977 poultry Species 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 229930000044 secondary metabolite Natural products 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K30/00—Processes specially adapted for preservation of materials in order to produce animal feeding-stuffs
- A23K30/10—Processes specially adapted for preservation of materials in order to produce animal feeding-stuffs of green fodder
- A23K30/15—Processes specially adapted for preservation of materials in order to produce animal feeding-stuffs of green fodder using chemicals or microorganisms for ensilaging
- A23K30/18—Processes specially adapted for preservation of materials in order to produce animal feeding-stuffs of green fodder using chemicals or microorganisms for ensilaging using microorganisms or enzymes
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/20—Bacteria; Culture media therefor
- C12N1/205—Bacterial isolates
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2400/00—Lactic or propionic acid bacteria
- A23V2400/11—Lactobacillus
- A23V2400/123—Bulgaricus
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12R—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES C12C - C12Q, RELATING TO MICROORGANISMS
- C12R2001/00—Microorganisms ; Processes using microorganisms
- C12R2001/01—Bacteria or Actinomycetales ; using bacteria or Actinomycetales
- C12R2001/225—Lactobacillus
Description
MICROORGANISMS AND THEIR USE IN TREATING
ANIMAL FEED AND SILAGE
Field of the Invention
This invention relates to microorganisms and their use in treating animal feed and silage.
Backaround of the Invention
The use of enzymes and organisms can improve or enhance the performance of animals and the value of the feed the animals receive. For example, WO-A-9210945 discloses such a combination for use in enhancing the value of prepared silage, and WO-A-9617525 relates to enhancement of animal performance using microorganisms. The efficacy of combining the use of enzymes together with organisms producing volatile fatty acids (VFA's) is also described.
In this case, better preservation of the silage, better animal performance and a reduction in effluent production were demonstrated. WO-A-9503396 demonstrates that some advantages may accrue when a desired VFA profile is produced during the silage fermentation; it has also been found that this does not produce the desired reduction in heating, on opening the silage clamp.
The production of silage and the associated crop husbandry have over recent years developed to an extent that a number of different processes can be defined. These are: (i) the ensiling of young grass with particularly low dry matter, e.g. less than 25% (common in UK, Ireland and
Scandinavia), (ii) the ensiling of higher dry matter, more mature grasses (UK), the ensiling of high dry matter but young grass achieved by wilting (Netherlands); and (iii) the ensiling of whole maize including stova and cob, usually at a dry matter concentration of about 35%, and whole crop cereals, e.g. wheat, at 45-50% dry matter.
Particularly in cases (ii) and (iii), one major problem occurs on a regular basis. This is the phenomenon known as aerobic spoilage. This phenomenon is not well understood. Although there are many differing opinions, the process of aerobic spoilage can be divided into phases.
Thus, there is an initial phase in which yeasts and sometimes acetic acid bacteria start to respire the preserving organic acids. After an initial rise in pH, there is a secondary phase in which the activity of bacilli is apparent, and is associated with increasing temperature.
A further phase includes activity of various microorganisms including fungi.
In those silages which contain a substantial content of dry matter, i.e. over 30%, the problem of spoilage is particularly acute. Spoilage is seen to a greater or lesser extent once a silage clamp is opened and exposed to air.
Summary of the Invention
This invention is based at least in part on identifying the aerobic spoilage process as being closely related to heating in the clamp on exposure to the ingress of air. Subsequent examination of such silages showed high concentration of thermophilic Gram-positive organisms, yeasts and bacteria including bacilli and fungi. This apparently demonstrates the onset of a secondary fermentation, akin to that of composting (the primary fermentation being the ensiling process). In this fermentation stage, yeast and moulds predominate. It appears that, in order to prevent spoilage, three main categories of organisms that need to be killed or suppressed are spore-forming bacteria, yeasts and fungi.
To eliminate only one category may lead to the proliferation of the remaining categories, so that spoilage is not prevented.
According to this invention, utility in the prevention of spoilage has been identified in materials that, at least in the first instance, inhibit microorganisms that initiate aerobic spoilage, notably yeasts and, at the surface of silage, fungi. An organism capable of doing this may also inhibit the development of other spoilage microorganisms, and may be identified by screening.
An organism of the species Lactobacillus buchneri, that meets this requirement has been deposited at the
National Collection of Industrial and Marine Bacteria on 13th February 1996. Its accession number is 40788.
As explained in more detail below, this organism has a surprising effect, different from and/or extending beyond that due to its ability to produde VFA's, such as acetic, propionic and lactic acids, that are normally produced in fermentation. The organism produces an antimicrobial substance or effect characterised by its ability to inhibit the growth of a variety of spoilage organism, and which is stable at 800C but inactivated at 1200C. It is reasonable to assume that any such substance (which may possibly be proteinaceous) may be produced by other organisms. Any one of ordinary skill in the art, provided with the information in this specification, will be able to identify whether any given organism, other than that which has been deposited, produces the same substance.
The substance may be isolated and purified by methods known to those of ordinary skill in the art. As such, it may be used directly to treat animal feed or silage. In other words, it may not be necessary to use a microorganism as such in the method of this invention.
DescriDtion of the Invention
For the purpose of illustrating the invention, an organism has been identified that is capable of producing an approximately normal silage fermentation together with a substance that can inhibit the other organisms thought to be associated with aerobic spoilage. Furthermore, when inoculated on whole crop wheat, maize and grass silage, this organism produces a silage that is well preserved and in which the onset of secondary fermentation associated with aerobic spoilage and heating is reduced or eliminated.
The organism thus appears to be able to produce the inhibitory substance under the conditions of fermentation found in silages. A VFA profile as usually obtained in well-fermented silages (with or without the use of inoculants including Lactobacillus plantarum) has been proven to be insufficient to prevent the occurrence of aerobic spoilage.
It appears that the inhibitory substance may be a secondary metabolite. Therefore, its full effect may not be seen if, when used in silage, that silage is opened too soon. The silage is preferably kept closed for at least 30 days, and more preferably for a longer period, e.g. at least 45 days. The optimum period will depend, e.g. inter alia, on the size of the silage mass, and the nature of the ensiled material.
Materials that are suitable for ensiling, in this invention, are any susceptible to aerobic spoilage. The material will usually contain at least 25% by weight dry matter. Such materials include rye or traditional grass, maize, Lucerne, wilted grass, wheat, barley or other whole crop cereal. The silage may be in bales (a form particularly susceptible to aerobic spoilage).
Alternatively, the invention may be used with any susceptible animal feed, whether solid or liquid, e.g. for pigs, poultry or ruminants.
The activity associated with this invention may be found in other strains of L. buchneri, in other species of
Lactobacillus, e.g. L. kefir, L. parakefir and L.
parabuchneri, and possibly also in other genera. This can be established by routine experimentation, on the basis of the information herein.
The activity is valuable in inhibiting the growth of various spoilage organisms. Examples of such organisms are
Listeria organisms, Bacillus spp., Guillermondella selenospora, Trichoderma longibrachiatum, Aspergillus niger, Monascus, Penicillium roquefortii, Fusarium spp., and enteric bacteria such as Salmonella.
Selected organisms were grown in liquid culture and the fermentation medium was separated from the cells. This medium was then used in trials to ascertain if there was present an inhibitory substance that could provide the desired effect, i.e. of heat-stable silage.
Experiments were conducted with three typical organisms that epitomise the spoilage process, i.e. a
Bacillus, a yeast and a fungus. Several combinations of the VFA's lactate, acetate, propanoate were also tested.
Only the extract from a small number of selected organisms produced the desired inhibitory result. This demonstrated that bacteria were capable of producing one or more substances inhibitory to the target organisms.
In order to demonstrate that such organisms could indeed prevent aerobic spoilage, further experiments were conducted. Organisms were cultured by conventional means and re-inoculated on to grass or whole crop wheat, in c. 10 kg batches, where the organism produced a fermentation not unlike that of a conventional ensiling fermentation, typical for the material ensiled. The nature of this fermentation is not fully understood, but the loss of dry matter (approx. 4%) as gas, presumably CO2, indicates that this may well be a partially heterofermentative fermentation. Silage prepared in this way proved to have a VFA profile approximating to that of a normal silage.
There was no evidence that silages prepared by inoculating with this organism in combination with enzymes would give the desired results. However, silages prepared in this way were taken and placed in large plastic boxes, approximately 0.5 m x 0.25 m by 0.1 m. The boxes were approximately half-filled. Thermocouples were placed in the silages to record the onset of the heating phase of the aerobic spoilage. Each box was placed on an open lab with excellent ventilation.
The results of one such experiment are given in
Example 1, below. The results indicate an apparently normal silage fermentation, but in a remarkable demonstration of the effects of the antimicrobial activity of the organism, the treated silage was thermostable, maintaining ambient temperatures (20or) for a period of at least ten days. In control and other treatments, the temperature rose to more than 35or.
Experiment 1
Whole crop wheat was treated with a formulation consisting of freeze-dried cells and enzymes. The formulation comprised 4.87% L. buchneri NCIMB 40788, 10.67% enzymes comprising 8-glucanase, xylanase and galactomannanase, 80.09% caster sugar, 3.13% Drimalan green
BGE and 1.25% Sipernat 50S. These figures are based on a II freeze-dried cell concentration of 3 x 10'lug L. buchneri.
This pale green, free-flowing powder formulation was used by dissolving 150 g in 100 1 water, to treat 25 tonnes of forage, by spraying at an application rate of 4 litres per
4 tonne. The viable count was 5 x 10 cfu/g whole crop wheat.
As the control, a conventional silage inoculant containing Pediococcus pentosaceus (NCIMB 12455) and
Lactobacillus plantarum (NCIMB 12422) was used. This is representative of organisms conventionally used in silage treatment, and is described below as the "normal inoculant".
The formulation was enclosed in fermentation barrels with vents to allow the normal fermentation process. The contents were examined after 130 days' analysis, and aerobic stability tests were then carried out.
Fermentation profiles
Treatment DM(%) pH CP(8) ME (MJ/Rg) No3(%) Untreated 49.6 4.1 12 10.6 0.11
Normal Inoculant 50.3 3.9 10 10.7 0.12
Test organism 51.0 4.0 10.4 10.1 0.11
Product profiles
lactate acetate propionate ethanol
Untreated 41 1 0 6
Normal inoculant 45 5 0 3
Test organism 35 4 0 6
Temp. development (OC) Treatment (hours) 0 50 100 150 200 250
Untreated 17 17 17 35 34 25
Normal inoculant 17 17 17 25 27 36
Test organism 17 17 17 17 17.5 18
These results, albeit on a small scale, demonstrate that the mechanism is not dependent on VFA profiles or VFA concentration.
Experiment 2
Bigbale grass silage was prepared, and treated with a similar formulation as in Example 1, additionally comprising amylase, to provide 1 x 105 cfu/g grass, at an application rate of 1 x 105 g forage. Control silages and silages treated with the L. buchneri strain were examined and analysed after periods of 28, 63, and 113 days of ensiling. The composition of the bigbale silage was as follows:
Day 28 Day 63 Day 113
Dry matter (g/kg) 335 373 361 367 328 337 pH 4.48 4.57 4.42 4.49 4.40 4.47
Lactate (g/kg DM) 54 54 66 59 78 71
Acetate 11 13 15 19 21 27
Propionate 0.7 0.7 0.6 0.7 0.8 1.0
Ethanol 8 8 7 8 9 10 NH3-N (%N) 9 8 11 10 12 12
Aerobic stability (h) 138 178 187 222 150 > 189
The results of Experiment 2 again demonstrate that the differences between the control and the invention are not simply due to the production of a particular VFA profile.
Moreover, there is an indication that the stability of the silage on exposure to air increases with time. This indicates a specific mode of action of the organism L.
buchneri and others with similar activities.
From the above results, it would appear that the mechanism of action is the production of at least one antimicrobial substance by the selected micro-organisms during the fermentation process. In order to characterise the nature of the antimicrobial substance, experiments were undertaken which demonstrated that the substance produced in the supernatant of fermentation broth of the selected organism did inhibit a wide range of micro-organisms. It was stable to heat treatment for 10 min at 800C, but was inactivated by heat for 10 min at 1200C. The VFA's also present in the fermentation broth appeared to have negligible or no effects on the growth of selected spoilage organisms.
Experiment 3
The mechanism of action was further demonstrated by a series of experiments in which culture supernatants were prepared after 24 and 48 hours' incubation in flask cultures. These supernatants were examined on specific organisms known to be active in the aerobic spoilage of fermentations such as those which occur in silage.
In this Experiment, attention was focused on the organisms falling into the yeast and mould categories. The effects of the supernatant were examined on the moulds,
Fusarium oxysporum (IMI 236441), Mucor racemosus (IMI 103730), Aspergillus niger (IMI 096215), Caldosporum herbarum (IMI 096220), Penicillum expansum (IMI 315902) and Trichoderma harzanium (IMI 275950), and the yeasts Candida krusei (ATCC 62403), Guilliermondella selenospora (ATCC 10629), Debraryomyces hansenii (ATCC 9364) and Pichia subpellicosa (ATCC 16766).
In each case, inhibition of the growth of the target organisms was demonstrated. In addition, those supernatants that were prepared from the broth following 48 hours' incubation generally showed the greater inhibitory activity than those incubated for 24 hours. This suggests that the antimicrobial effect is produced at a late stage in the cells' growth cycle, or that it accumulates with time, or that both these possibilities occur. The antimicrobial effect may thus accumulate at an increasing rate, with every generation. It is therefore desirable that, in the field, the fermentation should take place in an optimal manner and that the fermentation should continue for such a time as shall provide for the maximal accumulation of the antimicrobial effect. The time taken for production of the antimicrobial effect in the field, will vary with the conditions and with the nature of the forage that is being ensiled.
Experiment 4
To demonstrate the effect of time on the prevention of aerobic spoilage, grass silage was prepared as in
Experiment 1. The aerobic stability was then determined.
At 7 days, the stability of the silage was poor with heating occurring in line with the control. At 100 days, stability was assured.
Claims (22)
1. A method for treating animal feed susceptible to the growth thereon of spoilage organisms selected from yeasts, moulds and spore-forming bacteria, which comprises adding to the feed an antimicrobial effect obtainable by fermentation of Lactobacillus buchneri, NCIMB 40788, said effect being obtained in addition to fatty acids normally produced in fermentation, and said effect being characterised by its ability to inhibit the growth of said spoilage organisms.
2. A method for treating silage, which comprises adding thereto an antimicrobial effect as defined in claim 1.
3. A method according to claim 2, wherein the silage is of traditional grass, e.g. rye grass.
4. A method according to claim 2, wherein the silage is of maize.
5. A method according to claim 2, wherein the silage is of Lucerne.
6. A method according to claim 2, wherein the silage is of wilted grass.
7. A method according to claim 2, wherein the silage is of whole crop cereal, e.g. wheat or barley.
8. A method according to any of claims 2 to 7, wherein said effect is added on ensiling.
9. A method according to any of claims 2 to 8, which comprises maintaining the silage for at least 30 days.
10. A method according to any of claims 2 to 9, wherein the silage is in bales.
11 A method according to any preceding claim, which comprises adding to the feed or silage a microorganism having the ability to produce said effect on fermentation.
12. A method according to claim 11, wherein the microorganism has the ability to prevent the temperature of whole crop wheat silage, dry matter content 45%, from rising from 17"C by more than 40C over 200 hours.
13. A method according to claim 10 or claim 11, wherein the microorganism is of the genus Lactobacillus.
14. A method according to claim 13, wherein the microorganism is L. buchneri, L. parabuchneri, L. kefir or
L. parakefir.
15. A method according to claim 13, wherein the microorganism is L. buchneri
16. - A method according to claim 13, wherein the microorganism is Lactobacillus buchneri, NCIMB 40788.
17. A method according to any preceding claim, wherein said effect comprises an antimicrobial substance characterised by being, when subjected to heat for 10 min, stable at 800C and inactivated at 1200C.
18. Animal feed to which has been added an antimicrobial substance as defined in claim 17.
19. Animal feed to which has been added a microorganism as defined in any of claims 11 to 16.
20. Silage to which has been added an antimicrobial substance as defined in claim 17.
21. Silage to which has been added a microorganism as defined in any of claims 11 to 16.
22. Lactobacillus buchneri, NCIMB 40788.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9703249A GB2310124B (en) | 1996-02-15 | 1997-02-17 | Microorganisms and their use in treating animal feed and silage |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9603168.7A GB9603168D0 (en) | 1996-02-15 | 1996-02-15 | Microorganisms and their use in treating silage |
GB9703249A GB2310124B (en) | 1996-02-15 | 1997-02-17 | Microorganisms and their use in treating animal feed and silage |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9703249D0 GB9703249D0 (en) | 1997-04-09 |
GB2310124A true GB2310124A (en) | 1997-08-20 |
GB2310124B GB2310124B (en) | 1998-01-28 |
Family
ID=26308712
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9703249A Expired - Fee Related GB2310124B (en) | 1996-02-15 | 1997-02-17 | Microorganisms and their use in treating animal feed and silage |
Country Status (1)
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GB (1) | GB2310124B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999034679A1 (en) * | 1997-12-30 | 1999-07-15 | Atria Oyj | A biological method for elimination of salmonella from processes and structures |
US6403084B1 (en) * | 2000-11-03 | 2002-06-11 | Pioneer Hi-Bred International, Inc. | Mixed cultures for improved fermentation and aerobic stability of silage |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0071858A1 (en) * | 1981-08-06 | 1983-02-16 | Miles Laboratories, Inc. | Silage preservation with propionic acid producing microorganisms |
EP0221499A2 (en) * | 1985-11-04 | 1987-05-13 | Microlife Technics, Inc. | Method for inhibiting fungi |
EP0408220A2 (en) * | 1989-07-10 | 1991-01-16 | ZENECA Corp. | Mould control in forage |
GB2237723A (en) * | 1989-11-06 | 1991-05-15 | Pioneer Hi Bred Int | Preservation of silage |
GB2248760A (en) * | 1990-08-07 | 1992-04-22 | Ag Bag Corp | Stabilization of silage |
WO1992010945A1 (en) * | 1990-12-17 | 1992-07-09 | Biotal Ltd. | Formulation for treating silage |
EP0576780A2 (en) * | 1992-06-10 | 1994-01-05 | Valio Oy | A novel microorganism strain, bacterial preparations comprising said strain, and use of said strain and preparations for the controlling of yeasts and moulds |
WO1995003396A1 (en) * | 1993-07-23 | 1995-02-02 | Biotal Ltd. | Formulation for treating silage |
-
1997
- 1997-02-17 GB GB9703249A patent/GB2310124B/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0071858A1 (en) * | 1981-08-06 | 1983-02-16 | Miles Laboratories, Inc. | Silage preservation with propionic acid producing microorganisms |
EP0221499A2 (en) * | 1985-11-04 | 1987-05-13 | Microlife Technics, Inc. | Method for inhibiting fungi |
EP0408220A2 (en) * | 1989-07-10 | 1991-01-16 | ZENECA Corp. | Mould control in forage |
GB2237723A (en) * | 1989-11-06 | 1991-05-15 | Pioneer Hi Bred Int | Preservation of silage |
GB2248760A (en) * | 1990-08-07 | 1992-04-22 | Ag Bag Corp | Stabilization of silage |
WO1992010945A1 (en) * | 1990-12-17 | 1992-07-09 | Biotal Ltd. | Formulation for treating silage |
EP0576780A2 (en) * | 1992-06-10 | 1994-01-05 | Valio Oy | A novel microorganism strain, bacterial preparations comprising said strain, and use of said strain and preparations for the controlling of yeasts and moulds |
WO1995003396A1 (en) * | 1993-07-23 | 1995-02-02 | Biotal Ltd. | Formulation for treating silage |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999034679A1 (en) * | 1997-12-30 | 1999-07-15 | Atria Oyj | A biological method for elimination of salmonella from processes and structures |
US6403084B1 (en) * | 2000-11-03 | 2002-06-11 | Pioneer Hi-Bred International, Inc. | Mixed cultures for improved fermentation and aerobic stability of silage |
Also Published As
Publication number | Publication date |
---|---|
GB9703249D0 (en) | 1997-04-09 |
GB2310124B (en) | 1998-01-28 |
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PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20160217 |