Predicting feeding value of forage maize hybrids harvested at different maturities and sites

Krizsan, S.J.; Mussadiq, Zohaib; Hetta, Mårten; Ramin, Mohammad; Nyholm, Laura; Huhtanen, Pekka

doi:10.22358/jafs/65690/2014

Cited by 6 publications

(3 citation statements)

References 25 publications

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“…The lack of relationship between uNDF240 (as analyzed by NIR in the current study) and ATTD of OM or NDF digestibility is somewhat surprising. If properly calibrated, NIR can be successfully used to predict iNDF (or its modification, uNDF240; Raffrenato et al, 2018) concentration in forages (Nousiainen et al, 2004;Krizsan et al, 2014), and a good relationship between uNDF240 (determined IV) and lignin content was reported for a wide variety of forages by Palmonari et al (2016).…”

Section: Relationship Between Indf288 and Undf240 And In Vivo Total-tract Ndf Digestibilitymentioning

confidence: 99%

Effects of ensiling time on corn silage neutral detergent fiber degradability and relationship between laboratory fiber analyses and in vivo digestibility

Hristov

Harper

Roth

et al. 2020

Journal of Dairy Science

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Accurate analysis of degradability of silage neutral detergent fiber (NDF) is important for diet formulation and to predict lactational performance of dairy cows. In this study, 5 corn silage hybrids ensiled for 0 (unfermented), 30, 60, 120, and 150 d were used to determine the effects of ensiling time on silage neutral detergent fiber degradability (NDFD) and to assess the relationships between near-infrared reflectance spectroscopy (NIR) NDF-related analyses and in situ NDFD variables. In addition, the relationships between dietary concentration of indigestible NDF, 288-h incubation (iNDF288), or undegraded NDF, 240-h incubation (uNDF240), and in vivo total-tract apparent organic matter and NDF digestibility were studied in total mixed ration samples from 16 experiments with lactating dairy cows. Ensiling time had no effect on silage NDF concentration; however, the ratio of acid detergent fiber ÷ NDF increased, and estimated hemicellulose concentration decreased quadratically with ensiling time. Also, concentration of NDF-bound protein decreased, and that of lignin increased linearly with ensiling time. These changes in silage fiber composition resulted in a linear decrease in in situ effective degradability of silage NDF with increasing ensiling time. The indigestible fraction of NDF and concentration of structural carbohydrates were not affected by ensiling time. Correlations of in situ NDFD variables with laboratory NIR NDFD analyses were weak to moderate. The relationship of corn silage uNDF240 with lignin concentration or 30-h NDFD (all NIR analyses) was remarkably good (R 2 = 0.73 and 0.88, respectively). The relationship between in situ iNDF288 concentration (but not uNDF240) and in vivo total-tract apparent digestibility of dietary organic matter and NDF was good (R 2 = 0.72 and 0.80, respectively). In conclusion, in situ degradability of silage NDF linearly decreased from 0 to 150 d ensiling time, primarily caused by a decrease in concentrations of hemicellulose and NDF-bound protein. In situ NDF degradability measurements and common laboratory NIR NDF-related analyses were generally poorly correlated. We found a good relationship between in vivo NDF digestibility and dietary concentration of iNDF288 determined in situ, but the relationship with uNDF240 was poor.

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Section: Relationship Between Indf288 and Undf240 And In Vivo Total-tract Ndf Digestibilitymentioning

confidence: 99%

Effects of ensiling time on corn silage neutral detergent fiber degradability and relationship between laboratory fiber analyses and in vivo digestibility

Hristov

Harper

Roth

et al. 2020

Journal of Dairy Science

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“…Forage maize cultivation in Finland and the whole boreal region was the target of extensive investigation activities in the 1970s and 1980s [1,12,13]; however, interest in forage maize investigation diminished during the following decades [4,8,14,15]. Consequently, the number of studies concerning nitrogen (N) application of forage maize in the boreal region is limited.…”

Section: Introductionmentioning

confidence: 99%

Yield, Quality and Nitrogen Use of Forage Maize under Different Nitrogen Application Rates in Two Boreal Locations

et al. 2022

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Research focusing on the nitrogen (N) application and use of forage maize (Zea mays L.) in the boreal region is either limited or non-existent. The aim of this study was to investigate the response of yield, quality and N recovery efficiency (NRE) of forage maize to an increase in the N application rate and different climatic conditions in two locations in Finland. The field experiment was conducted in southern (Helsinki; 60° N) and central (Maaninka; 63° N) Finland in 2019 and 2020. Dry matter (DM) yield, forage quality and NRE were determined for N application rates of 100, 150 and 200 N kg ha−1. The DM yield was similar to all studied N application rates. Moreover, there were no marked differences in the studied forage quality traits or the NRE following the N application rates. However, the NRE of maize was generally low at 45%. The current study recommends a N application rate of 100–150 N kg ha−1 for forage maize in the boreal region. There is no need to increase the N application from current recommendations since climate conditions seem to limit the growth, development and NRE of forage maize. The observed low NRE of forage maize warrants further research in the future.

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“…Near-infrared reflectance spectroscopy (NIRS) technology can be utilised to expedite the feed evaluation process. In regard to forage digestibility, NIRS technology has been demonstrated to successfully predict iNDF concentration (Nousiainen et al, 2004;Krizsan et al, 2014). However, these NIRS calibration equations require sample preparation of drying and grinding which are laborious, time consuming and expensive.…”

Section: Quantifying the Nutritive Value Of Pasturementioning

confidence: 99%

Developments in nutrition for pasture-based cattle and sheep systems in Ireland

Patton

Dineen

Keady

et al. 2022

Irish Journal of Agricultural and Food Research

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For ruminant production systems, the requirement to meet specific nutrient targets in the animal’s diet must be balanced with the aim of achieving high utilisation of forage in the overall feed budget. A focus of research and extension in an Irish industry context has been to meet these objectives using grazed pasture as the predominant forage source. This has prompted investigation to improve understanding of the components defining forage nutritive value, as well as the management factors affecting its intake and utilisation by animals. Similarly, quantifying the animal performance responses to varying type, rate and timing of dietary supplementation has been an important area of investigation. This review summarises some of the principal outcomes and developments over recent years across beef, sheep and dairy production systems. In addition, ruminant production systems are increasingly challenged to reduce potential environmental impacts by mitigating nutrient and gaseous emissions across their production cycles. Current and emerging research with regard to this issue, and enteric methane production in particular, is discussed.

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Predicting feeding value of forage maize hybrids harvested at different maturities and sites

Cited by 6 publications

References 25 publications

Effects of ensiling time on corn silage neutral detergent fiber degradability and relationship between laboratory fiber analyses and in vivo digestibility

Effects of ensiling time on corn silage neutral detergent fiber degradability and relationship between laboratory fiber analyses and in vivo digestibility

Yield, Quality and Nitrogen Use of Forage Maize under Different Nitrogen Application Rates in Two Boreal Locations

Developments in nutrition for pasture-based cattle and sheep systems in Ireland

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