Intake and Digestibility of Corn Silages of Different Maturities, Varieties and Plant Populations

Hk, Goering; Rw, Hemken; Clark, Noel A.; Jh, Vandersall

doi:10.2527/jas1969.293512x

Cited by 16 publications

(11 citation statements)

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“…(1970) who reported N retention was greatest for silages of DM contents of 260 and 300 g DM kg −1 compared to silage containing either 240 or 390 g DM kg −1 . Goering et al. (1969) also found that high DM maize silage (350 g DM kg −1 ) was associated with lower N digestibility and retention than earlier harvested maize (250 g DM kg −1 ) when both silages were supplemented with a uniform quantity of soya bean meal.…”

Section: Discussionmentioning

confidence: 80%

“…Wilkinson et al (1978) compared maize silage with DM contents of 198, 267 and 346 g kg )1 and found that OM digestibility was reduced when the most mature silage was fed. A comparison between maize silage containing 250 and 350 g DM kg )1 fed to steers with 0AE45 kg soya bean meal also found that DM digestibility was lower for the high DM content silage (Goering et al, 1969). In an experiment that compared four stages of maize maturity with DM contents ranging from 240 to 390 g kg )1 , no significant differences between silage DM digestibility were found (Colovos et al, 1970) although OM digestibility was not reported.…”

Section: Discussionmentioning

confidence: 94%

“…(1978) compared maize silage with DM contents of 198, 267 and 346 g kg −1 and found that OM digestibility was reduced when the most mature silage was fed. A comparison between maize silage containing 250 and 350 g DM kg −1 fed to steers with 0·45 kg soya bean meal also found that DM digestibility was lower for the high DM content silage (Goering et al. , 1969).…”

Section: Discussionmentioning

confidence: 99%

“…(1981) found N digestibility of maize silage with a low DM content ( c. 250 g DM kg −1 ) to be significantly higher than that of maize silage containing more than 300 g DM kg −1 . The literature contains other reports of advancing maize maturity having a negative effect on N digestibility (Goering et al. , 1969; Calder et al.…”

Section: Discussionmentioning

confidence: 99%

“…The crop maturity of maize can also affect dietary nitrogen (N) utilization, although the literature contains conflicting results. Negative effects of crop maturity on N retention have been reported (Goering et al, 1969), along with reports of no effect (Joanning et al, 1981), but often diets were not isonitrogenous, making reliable comparisons difficult.…”

Section: Introductionmentioning

confidence: 99%

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Apparent digestibility and nitrogen utilization of diets based on maize silage harvested at three stages of maturity and fed to steers

Browne

Juniper

Bryant

et al. 2005

Grass and Forage Science

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Advancing maize crop maturity is associated with changes in ear-to-stover ratio which may have consequences for the digestibility of the ensiled crop. The apparent digestibility and nitrogen retention of three diets (Early, Mid and Late) containing maize silages made from maize of advancing harvest date [dry matter (DM) contents of the maize silages were 273, 314 and 367 g kg )1 for the silages in the Early, Mid and Late diets respectively], together with a protein supplement offered in sufficient quantities to make the diets isonitrogenous, were measured in six Holstein-Friesian steers in an incomplete Latin square design with four periods. Dry-matter intake of maize silage tended to be least for the Early diet and greatest for the Medium diet (P ¼ 0AE182). Apparent digestibility of DM and organic matter did not differ between diets. Apparent digestibility of energy was lowest in the Late diet (P ¼ 0AE057) and the metabolizable energy concentrations of the three silages were calculated as 11AE0, 11AE1 and 10AE6 MJ kg )1 DM for the Early, Medium and Late diets respectively (P ¼ 0AE068). No differences were detected between diets in starch digestibility but the number of undamaged grains present in the faeces of animals fed the Late diet was significantly higher than with the Early and Mid diets (P ¼ 0AE006). The apparent digestibility of neutral-detergent fibre of the diets reduced significantly as silage DM content increased (P ¼ 0AE012) with a similar trend for the apparent digestibility of acid-detergent fibre (P ¼ 0AE078). Apparent digestibility of nitrogen (N) was similar for the Early and Mid diets, both being greater than the Late diet (P ¼ 0AE035). Nitrogen retention did not differ between diets. It was concluded that delaying harvest until the DM content is above 300 g kg )1 can negatively affect the nutritive value of maize silage in the UK.

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Section: Discussionmentioning

confidence: 80%