Evaluation of Yield, Quality, and Plant Composition of Early-Maturing Corn Hybrids Harvested at Three Stages of Maturity

Xu, Shuxiang; Harrison, Joe; Kezar, W.; Entrikin, N.; Loney, K.A.; Riley, Robert G.; Bush, L.J.; Guthrie, L.D.; Hunt, C. W.

doi:10.15232/s1080-7446(15)32580-8

Cited by 23 publications

(13 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Disappearance of NDF was greater for corn silage harvested at one-third ML than advanced maturities (two-thirds ML and BL) at 24 (P < 0.002), 48 (P < 0.003), and 96 (P < 0.0001) h of incubation in the rumen in experiment 2 (Table 12). Others (Xu et al, 1995) reported a decrease in in vitro DM digestibility of the stover portion of corn silage as maturity advanced from milk to BL.…”

Section: Maturity By Mechanical Processing Experimentsmentioning

confidence: 99%

Corn Silage Management: Effects of Hybrid, Maturity, Chop Length, and Mechanical Processing on Rate and Extent of Digestion

Johnson

Harrison

Davidson

et al. 2003

Journal of Dairy Science

Self Cite

View full text Add to dashboard Cite

Five experiments were conducted to evaluate the effects of hybrid, chop length, maturity, and mechanical processing of corn silage on dry matter and nutrient disappearance in the rumen. Corn silage that had not been dried or ground was incubated in macro in situ bags (30 x 35 cm) for 8, 16, 24,48, and 96 h. Experiments la and 2 evaluated the effects of maturity and mechanical processing for two corn silage hybrids harvested at two theoretical lengths-of-cut. Experiments 3 through 5 evaluated the effects of chop length and mechanical processing for two corn silage hybrids harvested at two-thirds milkline. The hybrid with low neutral fiber (NDF) concentrations had greater dry matter and starch disappearance than the hybrid with high NDF concentrations. The effect of chop length on nutrient disappearance was variable across experiments 3 through 5. Processing improved dry matter disappearance in experiments la, 2 (two-thirds milkline and blackline), 3, 4, and 5 at the majority of ruminal incubation timepoints. Starch disappearance was greater for unprocessed corn silage in experiment la (hard dough and two-thirds milkline) and was greater for processed corn silage in experiments 2 and 5. However, there was no consistent trend in starch disappearance between processed and unprocessed corn silage in experiments 3 and 4. This can be partially explained by the high disappearance of starch (experiment 3, > or = 98% and experiment 4, > or = 94%) by 24 h of ruminal incubation. Minimal differences were detected in NDF disappearance between processed and unprocessed corn silage across maturities. In experiments 2 and 5, crude protein disappearance was improved due to processing at some incubation timepoints. Rate of dry matter, starch (one-third milkline and two-thirds milkline), and NDF disappearance tended to increase when corn silage was mechanically processed in experiment 2. Dry matter, starch, and crude protein disappearance tended to be greater for corn silage harvested at the early maturity (one-third milkline) in experiment 2 compared with advanced maturities (two-thirds milkline and blackline). Disappearance of NDF was greater at early maturities compared with advanced maturities in experiments 1a and 2. Rate of dry matter (hybrid 3845), starch, and NDF (hybrid 3845) disappearance tended to decrease as maturity advanced from one-third milkline to blackline in experiment 2. These results suggest that the macro in situ method can be used to evaluate nutrient disappearance in the rumen.

show abstract

Section: Maturity By Mechanical Processing Experimentsmentioning

confidence: 99%

Corn Silage Management: Effects of Hybrid, Maturity, Chop Length, and Mechanical Processing on Rate and Extent of Digestion

Johnson

Harrison

Davidson

et al. 2003

Journal of Dairy Science

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Agronomic Practices To Enhance Iber Digestibilitymentioning

confidence: 99%

“…Coors et al suggested the observed drop in iber concentration with increasing maturity to the dilution efect with increasing percentage of grain as the corn plant matures [91]. Fiber concentration of corn stover increases as maturity increases [92,93].Increasing the height of cuting, which results in leaving a larger proportion of less digestible stalk in the ield, may increase the feeding value of silage for lactating dairy cows. It has been reported that corn silage digestibility was enhanced at cuting heights of 4 0 cm.…”

mentioning

confidence: 99%

Maximizing Fiber Utilization of Silage in Ruminants

Refat¹,

Yu²

2016

Advances in Silage Production and Utilization

View full text Add to dashboard Cite

This chapter highlights the importance of iber digestibility and utilization in ruminants and to summarize the main factors that inluence iber digestibility in silages. Forage provides at least half of the diet of lactating catle and greatly afects energy and carbohydrate intake. It is important to maximize the intake of digestible carbohydrate from forages, because energy requirements for maintenance and milk production often exceed the amount of energy high-producing cows can consume, particularly in early lactation. There are many approaches used for enhancing iber utilization in silage and subsequent maximizing energy intake and productivity of dairy catle. Out of these approaches are: selecting appropriate forages with high iber digestibility, applying the appropriate agronomic practices such as harvesting at the proper stage of maturity, fertilization, and cuting height at harvest, along with using of esterase-producing inoculants or ibrolytic enzymes have been proposed as approaches to improving the productivity of dairy catle.Keywords: feed additive, iber utilization, nutrient availability, ruminants . IntroductionThe global livestock industry faces an extensive challenge since a presumed dichotomy exists between the increasing requirements for animal feeding conferred by population growth and consumer concerns regarding the sustainability of livestock production [1]. Meanwhile, the cost of feed grains for livestock has increased substantially in recent years [2]. Thus, there is an increasing interest in using silages as a main source of forages in ruminant's diets, with high nutritive value as an alternative feed source. In high-producing dairy catle, it is important to maximize digestible carbohydrate intake or increase neutral detergent iber digestibility (NDFD) from silage because the energy needed for maintenance and milk production often © 2016 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.© 2016 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.exceeds the amount of energy high-producing cows can consume, particularly in early lactation [3]. One of the main factors that afect silage utilization is the proportion of its potentially digestible iber fraction, where silage having less than 0% of total iber content is available for digestion by the ruminant animal [4]. The irst section of this chapter will discuss the most important aspects of silage iber digestibility. The chapter starts by the importance of iber digestibility, before considering the method used for evaluating iber digestibility. This is followed by iber...

show abstract

“…Several studies have shown differences between hybrids in nutrient composition of whole plant and yield of dry matter (DM) of corn (Hunt et al, 1993;Xu et al, 1995;Melo et al, 1999;Oliveira et al, 2003;Qiu et al, 2003). Commercial corn hybrids that are to be harvested for silage have been selected on the basis of agronomic traits such as grain yield and disease resistance (Bal et al, 2000;Clark et al, 2002) and differences in the nutritive value of whole-plant corn silages related to corn genetics have been ignored (Bal et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Intake, digestibility, and performance of steers fed diets based on two corn silage hybrids and two concentrate levels

Chizzotti

Pereira

Filho

et al. 2010

Arq. Bras. Med. Vet. Zootec.

View full text Add to dashboard Cite

A trial involving a 2x2 factorial arrangement of treatments was conducted to evaluate two corn silage hybrids (Agromen, AGN35-A42) and (Bayer, A3663) and concentrate levels (25 and 50%) on animal performance. Twenty-four Holstein x Zebu crossbred steers, averaging 335±30kg of BW, were distributed in six randomized blocks to evaluate intake, digestibility, and performance. Treatments consisted of 75% corn silage A + 25% concentrate, 50% corn silage A + 50% concentrate, 75% corn silage B + 25% concentrate, and 50% corn silage B + 50% concentrate (dry matter basis); formulated to be isonitrogenous (13% crude protein, dry matter basis). There were no differences in the daily intakes of dry matter (DM), organic matter (OM), and crude protein. Additionally, there was a concentrate effect on non-fiber carbohydrates and total digestible nutrients intakes, and on total apparent digestibility of DM and OM, with higher intakes for steers fed diets with 50% of concentrate. However, average daily gain (ADG) was not influenced by treatments. The utilization of both corn silage hybrids in association with 25% of concentrate is a good option to feed crossbred steers with ADG close to 1.0kg in order to reduce diet cost.

show abstract

Evaluation of Yield, Quality, and Plant Composition of Early-Maturing Corn Hybrids Harvested at Three Stages of Maturity

Cited by 23 publications

References 11 publications

Corn Silage Management: Effects of Hybrid, Maturity, Chop Length, and Mechanical Processing on Rate and Extent of Digestion

Corn Silage Management: Effects of Hybrid, Maturity, Chop Length, and Mechanical Processing on Rate and Extent of Digestion

Maximizing Fiber Utilization of Silage in Ruminants

Intake, digestibility, and performance of steers fed diets based on two corn silage hybrids and two concentrate levels

Contact Info

Product

Resources

About