Acidity and Proteolysis as Factors Affecting the Nutritive Value of Corn Silage

Wilkinson, J. M.; Huber, J.T.; Henderson, H. E.

doi:10.2527/jas1976.421208x

Cited by 25 publications

(14 citation statements)

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“…Poor animal performance associated with decreased feed intake of ensiled grain corn has occasionally been observed (Tonroy et al 1914). Sprague and Breniman (1969) (Wilkinson et al 1976 (McKnight et al 1913). Generally, in ensiled forage crops proteolysis occurs within 5 d of ensiling (Bergen et al 197 4;Oshima and McDonald 1968) and is due to plant enzymes (Kemble 1956) which optimize activity within certain ranges of silage pH (McKersie and Buchanan-Smith 1982).…”

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confidence: 99%

Proteolysis and Fermentation of Grain-Corn Ensiled at Several Moisture Levels and Under Several Simulated Storage Methods

Baron¹,

Stevenson²,

Buchanan-Smith³

1986

Can. J. Anim. Sci.

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and fermentation of grain-corn ensiled at several moisture levels and under several simulated storage methods. Can. J. Anim. Sci. 66: 451461 . Proteolysis of ensiled grain corn (Zea mays L.) was studied in both whole-kernel and ground forms at initial grain moisture levels ranging from 22 to 36Vo. Three trials simulated and examined the effects of anaerobic fermentation, aerobic preensiling and aerobic postensiling environments on soluble nitrogen (SN) formation (Trials I , 2 and 3, respectively). Sealed mason jars ( 1 .2 L) with fermentation locks, polyethylene-lined metal pails (23 L) and polyethylene-lined metal pails with fermentation locks were used as storage containers in Trials 1,2 and 3, respectively.Soluble nitrogen as a percent of total nitrogen (TN) increased substantially during anaerobic fermentation (0-90 d), but increased only slightly and not at all during aerobic storage pre-ensiling (0-5 d) and postensiling (0-8 d). As moisture level increased, rates and extent of fermentation and proteolysis increased in both whole and ground grain (Trial 1

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mentioning

confidence: 99%

Proteolysis and Fermentation of Grain-Corn Ensiled at Several Moisture Levels and Under Several Simulated Storage Methods

Baron¹,

Stevenson²,

Buchanan-Smith³

1986

Can. J. Anim. Sci.

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“…The amounts of acetic and propionic acids were quite high, but no butyric acid was found in the silages. The contents of organic acids were quite normal for this kind of silages (Owens et al 1970, Andrieu 1976, Wilkinson et al 1976). …”

Section: Resultsmentioning

confidence: 94%

“…The high acidity could also have reduced the consumption of the silages (Wilkinson et al 1976). According to Zimmer (1976) the content of alcohols is usually small in corn silages, but after an intensive fermentation alcohols could exist in the silages and also they could have reduced the palatability of the silages.…”

Section: Resultsmentioning

confidence: 99%

Preliminary studies on the conservation of whole sorghum and corn plant and sugar corn stover for silage

Setälä

Seppälä

Pulli

1979

AFSci

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Abstract. The whole corn plant and sugar corn stover were ensiled in stacks covered with plastics and soil. Sorghum was ensiled in tower silo. The amounts of fodder ensiled were 2 500 kg. 3 100 kg and 1 400 kg. respectively. All silages were chopped with a precision chopper and ensiled without preservatives. The feeding values of the silages were determined with sheep according to 2 X 3 X 3 Latin square design. Urea (0.3 % of the fresh weight) was added to the silages before feeding.An intense secondary fermentation was found in all silages. The possible causes for this were the soil contamination of the fodder during harvesting and the effluent remained in the stack silages. The secondary fermentation decreased the sugar content of the silages and increased the fermentation losses especially in the corn silage. However, the quality of the silages was fairly good.Urea decreased the palatability of the silages and it would be better to add the urea to the silages before the ensiling.The energy and DCP values of the silages were quite modest. There were 0.63, 0.72 and 0.69 f.u./kg silage DM in sorghum, corn and corn stover silages, respectivelyThe corresponding values for DCP were 75. 62 and 86 g/kg silage DM (urea included)

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“…These substances could, however, cause some feeding problems in regard to the acidity of silages for instance (Wilkinson et al 1976). …”

Section: Introductionmentioning

confidence: 99%

Maize for silage II. The effect of urea and acid as preservative treament on rumen fermentations and on feeding values of silages

Setälä

Seppälä

Pirinen

et al. 1980

AFSci

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Abstract. The rumen fermentations and N-balances of rumen fistulated sheep were studied on diets of silages treated with urea and acid preservative. The digestibilities and feeding values of the silages were also calculated. The experiment was performed according to 5 x 5 Latin-square design. The digestibilities were determined by total collection the collection period lasting seven days. The rumen samples were taken on the last two days during the collection periods before and 1.5, 3.0, 4.5 and 6.0 hours after feeding. Besides the silages the animals received mineral mixture and water ad libitum. Urea or acid treatment had no effect (P > 0.05) on the consumption of silage DM.The consumption ranged from 1.7 to 1.9 kg DM/100 kg liveweight.Urea did not have a clear effect on the VFA production in the rumen. It tended, however, to decrease the proportions of C 3 and C 4 -C S acids in the rumen. Acid preservative decreased the production of VFA and the proportion of C 3 -acid (P < 0.05) in the rumen. The proportion of C 3 -acid was higher respectively, (P < 0.05). The rumen ammonia levels were extremely high, 60 -BO mg/100 ml, after feeding with urea treated silages. This was possibly partly due to the relatively short (14 days) adaptation time before collection period.The urea or acid preservative treatment gave no clear responses regarding the apparent digestibility values of the silages. The DCP values were highest (P < 0.05) in the urea treated silages, but no differences (P > 0.05) were found between the energy values, which varied between 0,12 0.14 f.u./kg of silage.There were no differences in the N-balances of the animals on different diets. The balances were positive on all diets.

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Acidity and Proteolysis as Factors Affecting the Nutritive Value of Corn Silage

Cited by 25 publications

References 0 publications

Proteolysis and Fermentation of Grain-Corn Ensiled at Several Moisture Levels and Under Several Simulated Storage Methods

Proteolysis and Fermentation of Grain-Corn Ensiled at Several Moisture Levels and Under Several Simulated Storage Methods

Preliminary studies on the conservation of whole sorghum and corn plant and sugar corn stover for silage

Maize for silage II. The effect of urea and acid as preservative treament on rumen fermentations and on feeding values of silages

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