Effect of Recutting and Plant Maturity on Kernel Passage and Feeding Value of Corn Silage

Buck, G.R.; Merrill, W.G.; Coppock, C.E.; Slack, S. T.

doi:10.3168/jds.s0022-0302(69)86803-7

Cited by 19 publications

(15 citation statements)

References 5 publications

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“…Decreased corn silage particle length increased DMI (Wilkinson et al, 1978;Weigand et al, 1993). Other studies have reported no effect on DMI when corn silage was re-cut or rolled (Buck et al, 1969;Miller et al, 1969;Rojas-Bourrillon et al, 1987).…”

Section: Intake and In Vivo Digestibilitymentioning

confidence: 89%

Effect of hybrid, maturity, and mechanical processing of corn silage on intake and digestibility by beef cattle.

Andrae

Hunt

Pritchard

et al. 2001

Journal of Animal Science

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A study involving a 2 x 2 x 2 factorial arrangement of treatments was conducted to evaluate effects of hybrid (Pioneer 3335 and 3489), maturity (half milkline and blacklayer), and mechanical processing (field chopper with and without on-board rollers engaged) on intake and digestibility of corn silage. Forty Angus steers (322 +/- 5.2 kg BW) were assigned to the eight silage treatments (five steers per treatment) and individually fed using electronic gates. Diets consisted of 60% corn silage and 40% chopped alfalfa hay (DM basis). Following a 5-d adaptation period, intake was measured for 7 d and subsequently fecal samples were collected for 5 d. Chromic oxide (5 g/d) was fed beginning 7 d before fecal sample collection and digestibility was determined by the ratio of Cr in the feed and feces. Steers were reallocated to treatments and these procedures were repeated, providing 10 observations per treatment. In addition, all silages were ruminally incubated in six mature cows for 0, 8, 16, 24, 48, and 96 h to determine extent and rate of DM, starch, NDF, and ADF disappearance. Processing increased DMI of hybrid 3489 but did not affect DMI of hybrid 3335 (hybrid x processing; P < 0.06). Total tract digestibility of DM, starch, NDF, and ADF decreased (P < 0.01) as plant maturity increased. Maturity tended to decrease starch digestibility more for hybrid 3489 than for hybrid 3335 (hybrid x maturity; P < 0.10). Processing increased (P < 0.01) starch digestibility but decreased (P < 0.01) NDF and ADF digestibility, resulting in no processing effect on DM digestibility. There was a numerical trend for processing to increase starch digestibility more for latethan for early-maturity corn silage (maturity x processing; P = 0.11). Processing increased in situ rates of DM and starch disappearance and maturity decreased in situ disappearance rates of starch and fiber. These data indicate that hybrid, maturity, and processing all affect corn silage digestibility. Mechanical processing of corn silage increased starch digestibility, which may have been associated with the observed decreased fiber digestibility.

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Section: Intake and In Vivo Digestibilitymentioning

confidence: 89%

Effect of hybrid, maturity, and mechanical processing of corn silage on intake and digestibility by beef cattle.

Andrae

Hunt

Pritchard

et al. 2001

Journal of Animal Science

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“…When fine chopped and rechopped silages were offered to dairy cows milk yield was little affected, but the rechopping process reduced milk fat content, which increased with time (Huber et al 1966;Miller et al 1969). Buck et al (1969) found no significant effect of the rechopping process on solids corrected milk yield or on milk fat content and suggested that this might have been due to the relatively short periods (5 weeks) used in their experiment. Little advantage would seem to be achieved by chopping whole crop maize shorter than 13 mm before ensiling and possibly a longer chop could be effectively employed.…”

Section: Maize Silagementioning

confidence: 99%

“…Differences in DM intake by dairy cows (Buck et al 1969;Miller et al 1969) and by heifers (Huber et al 1966) between chopped 6-13 mm) and rechopped maize (sufficient to break individual grains) before ensiling has also been found to be not significant, and in one comparison (Huber et al 1966) dairy cows ate significantly more (P < 0.05) field-chopped than rechopped maize silage.…”

Section: Maize Silagementioning

confidence: 99%

“…For example with whole-crop maize, increasing fineness of chop has increased digestibility (Miller et al 1969;Penning et al 1976), had no significant effect (Buck et al 1969";Bryant 1976), or decreased digestibility (Pelletier et al 1976). With pasture species, many determinations have been confounded with differences in intake (Dulphy andcolleagues 1972-1975;Balch et al 1955;Murdoch et al 1955).…”

Section: Lossesmentioning

confidence: 99%

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A review of the effects of mechanical treatment of forages on fermentation in the silo and on the feeding value of the silages

Marsh

1978

New Zealand Journal of Experimental Agriculture

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The effect of mechanical damage (Iaceratiori, chopping, etc.) on fermentation and losses of herbage in the silo and the effect of the resultant silages on digestibility, intake, and subsequent animal production are reviewed. Physical damage was found to increase rate of fermentation and also tended to reduce losses from the silo compared with long-cut material. The effect of physical damage on digestibility was small and variable; many determinations were confounded with intake and consequently no firm conclusions could be drawn. Intake of silages by sheep increased markedly with increasing fineness of chop, but no optimum chop length for maximum intake was determined. Growing and adult cattle also increased silage intake as fineness of chop increased, but the response was smaller than with sheep and showed little justification for fine chopping « 25 mm); however, most cattle comparisons were made in association with concentrate supplementation which limits extrapolation of results to sole ration or supplement to pasture feeding systems. Despite responses in intake to increasing fineness of chop, production responses from sheep and growing and lactating cattle were small and often not significant. It was concluded that little justification could be found for fine chopping in terms of improved animal production, but further studies were required under New Zealand pastoral conditions if this conclusion is to be confirmed and the reasons why determined.

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“…A higher theoretical chop length would otherwise lead to a reduced starch and fibre digestibility (Cook and Bernard, 2005). The optimal chop length and shredding of maize to be ensiled and fed to dairy cows has been the subject of research already in the 1960s (Buck et al, 1969;Miller et al, 1969) and was reviewed by Johnson et al (1999), but only few studies dealt with the effects of this processed long-chopped maize silage. Vanderwerff et al (2015) showed a slightly increased milk yield when replacing conventional maize silage by this type of long-chopped maize silage in a diet with 400 g concentrate/kg diet DM.…”

mentioning

confidence: 99%

Effect of feeding hay vs. silages of various types to dairy cows on feed intake, milk composition and coagulation properties

Manzocchi

Hengartner²,

Kreuzer

et al. 2020

Journal of Dairy Research

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This research paper addresses the hypotheses (1) that milk produced from hay-fed cows differs from that of silage-fed cows and (2) that silage type has an important impact, too. Four diets differing in forage type but with equal estimated milk production potential and a forage:concentrate ratio of 0.85 : 0.15 were compared regarding their effect on feed intake, milk yield and milk properties. The forages tested were hay, grass silage, conventional short-chopped and long-chopped maize silage subjected to a novel processing technology (Shredlage®). Twenty-four dairy cows were fed two of the four diets in two consecutive runs in an incomplete (4 × 2) Latin-square design (n = 12 per diet). Each experimental period lasted 22 d, with 12 d of adaptation and 10 d of sampling. During sampling, feed intake and milk yield were recorded daily, milk composition and coagulation properties were determined four times. The composition of the diet ingredients was analysed weekly. Data were analysed with a mixed model considering feed, period and their interaction as fixed effects. Stage of lactation, milk yield and milk composition from the pre-experimental period were used as covariates in the model. Dry matter intake was lower with the long-chopped processed maize silage compared to the other three groups. There were some diet differences in intakes of net energy for lactation and absorbable protein in the duodenum, but this did not result in changes in milk yield. The milk fat content was higher with the grassland-based diets compared to the maize silage diets. No treatment effect on milk acidity and rennet coagulation properties was observed. In conclusion, there were no indications for specific physico-chemical properties of milk from a hay-based diet, and maize processing technology was not of large effect either. Future investigations should focus on sensory differentiation of the milk produced with different forages.

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Effect of Recutting and Plant Maturity on Kernel Passage and Feeding Value of Corn Silage

Cited by 19 publications

References 5 publications

Effect of hybrid, maturity, and mechanical processing of corn silage on intake and digestibility by beef cattle.

Effect of hybrid, maturity, and mechanical processing of corn silage on intake and digestibility by beef cattle.

A review of the effects of mechanical treatment of forages on fermentation in the silo and on the feeding value of the silages

Effect of feeding hay vs. silages of various types to dairy cows on feed intake, milk composition and coagulation properties

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