Italian ryegrass silage in winter feeding of organic dairy cows: forage intake, milk yield and composition

Baldinger, Lisa; Baumung, Roswitha; Zollitsch, Werner; Knaus, Wilhelm

doi:10.1002/jsfa.4203

Cited by 25 publications

(22 citation statements)

References 15 publications

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“…Nitrogen efficiency, defined as the percentage of N in the milk compared with N intake, did not differ between the 2 groups (24.1%). This is in accordance with the results of Baldinger et al (2011), who reported N efficiencies between 24.6 and 24.7% under similar feeding conditions. Powell et al (2010), however, described a potential N efficiency between 30 and 35%.…”

Section: Nutrient Balances Efficiency Of Milk Production and Feed Vsupporting

confidence: 93%

“…These differences can be explained by the higher CP content of the control mixture, because dietary CP content has been detected as the main nutritional factor influencing milk urea content (Nousiainen et al, 2004). The general level of milk urea observed in the current experiment (21.6 and 18.4 mg/100 mL) was within the desired range of 15 to 30 mg/100 mL, indicating an adequate protein and energy supply (Sawa et al, 2011) and in agreement with the findings of Baldinger et al (2011), who observed milk urea contents of 18.5 and 19.9 mg/100 mL. Most of the blood metabolites and haptoglobin were not affected by the concentrate type.…”

Section: Milk Production and Concentrations Of Physiological Blood Vasupporting

confidence: 88%

“…The general level of milk production in this trial (26.0-27.8 kg) can be classified as above average when compared with other feeding trials for organic cows under similar conditions (Sehested et al, 2003;Baldinger et al, 2011). The substitution of a common concentrate for the BP mixture did not significantly affect milk yield or energy corrected milk yield.…”

Section: Milk Production and Concentrations Of Physiological Blood Vamentioning

confidence: 52%

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Feeding of by-products completely replaced cereals and pulses in dairy cows and enhanced edible feed conversion ratio

Ertl

Zebeli

Zollitsch

et al. 2015

Journal of Dairy Science

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When fed human-edible feeds, such as grains and pulses, dairy cows are very inefficient in transforming them into animal products. Therefore, strategies to reduce human-edible inputs in dairy cow feeding are needed to improve food efficiency. The aim of this feeding trial was to analyze the effect of the full substitution of a common concentrate mixture with a by-product concentrate mixture on milk production, feed intake, blood values, and the edible feed conversion ratio (eFCR), defined as human-edible output per human edible input. The experiment was conducted as a change-over design, with each experimental period lasting for 7wk. Thirteen multiparous and 5 primiparous Holstein cows were randomly assigned to 1 of 2 treatments. Treatments consisted of a grass silage-based forage diet supplemented with either conventional ingredients or solely by-products from the food processing industry (BP). The BP mixture had higher contents of fiber and ether extract, whereas starch content was reduced compared with the conventional mixture. Milk yield and milk solids were not affected by treatment. The eFCR in the BP group were about 4 and 2.7 times higher for energy and protein, respectively. Blood values did not indicate negative effects on cows' metabolic health status. Results of this feeding trial suggest that by-products could replace common concentrate supplements in dairy cow feeding, resulting in an increased eFCR for energy and protein which emphasizes the unique role of dairy cows as net food producers.

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Section: Nutrient Balances Efficiency Of Milk Production and Feed Vsupporting

confidence: 93%

Section: Milk Production and Concentrations Of Physiological Blood Vasupporting

confidence: 88%

Section: Milk Production and Concentrations Of Physiological Blood Vamentioning

confidence: 52%

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Feeding of by-products completely replaced cereals and pulses in dairy cows and enhanced edible feed conversion ratio

Ertl

Zebeli

Zollitsch

et al. 2015

Journal of Dairy Science

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“…), which is an important forage crop in temperate regions (Baldinger et al . ; Kaneko et al . ; Popay et al .…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Neotyphodium uncinatum and N -formylloline in Italian ryegrass, and their relation to insect resistance in the field

Matsukura

Shiba

Sasaki³

et al. 2013

J Appl Microbiol

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Aims: A fungal endophyte, Neotyphodium uncinatum, accumulates N-formylloline, which is toxic to Hemipteran insects, in Italian ryegrass. This study aimed to clarify the dynamics of N. uncinatum and N-formylloline in Italian ryegrass, and their relationship to insect resistance. Methods and Results: Changes in the density and localization of N. uncinatum and N-formylloline in N. uncinatum-infected Italian ryegrass were examined by real-time PCR and gas chromatography, respectively. Neotyphodium uncinatum multiplied on pseudostems at the flowering stage, and then increased on inflorescences at the ripening stage. On the other hand, N-formylloline accumulated heavily in inflorescences and leaf blades, but lightly in pseudostems at the ripening stage. In field experiments, N. uncinatum-infected Italian ryegrass suppressed the occurrence of Stenotus rubrovittatus, which fed on the inflorescences, but was not effective to Laodelphax striatellus, which do not necessarily prefer a particular plant tissue. Conclusion: Localization of N. uncinatum and N-formylloline were discordant in Italian ryegrass. The N. uncinatum-infected Italian ryegrass was effective to only insects that prefer to feed on particular plant tissues containing N-formylloline. Significance and Impact of Study: Our data implies that the relationship between insect habits and the dynamics of alkaloids in plants is important for the effective use of endophyte-infected crops.

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“…originated in the Mediterranean region and is produced mainly for hay and silage. It is one of the most important forage grasses in the temperate zones of Europe and Asia because of its high palatability to and digestibility by livestock [ 1 , 2 ].…”

Section: Introductionmentioning

confidence: 99%

Identification of a novel major locus for gray leaf spot resistance in Italian ryegrass (Lolium multiflorumLam.)

et al. 2014

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BackgroundGray leaf spot (GLS), caused by Magnaporthe oryzae (anamorph Pyricularia oryzae), in ryegrasses is a very serious problem. Heavily infected small seedlings die within a matter of days, and stands of the grasses are seriously damaged by the disease. Thus, the development of GLS-resistant cultivars has become a concern in ryegrass breeding.ResultsPhenotypic segregations in a single cross-derived F1 population of Italian ryegrass (Lolium multiflorum Lam.) indicated that the GLS resistance in the population was possibly controlled by one or two dominant genes with 66.5–77.9% of broad-sense heritability. In bulked segregant analyses, two simple sequence repeat (SSR) markers, which have so far been reported to locate on linkage group (LG) 3 of Italian ryegrass, showed specific signals in the resistant parent and resistant bulk, indicating that the resistance gene locus was possibly in the LG 3. We thus constructed a genetic linkage map of the LG 3 covering 133.6 centimorgan with other SSR markers of the LG 3 of Italian ryegrass and grass anchor probes that have previously been assigned to LG 3 of ryegrasses, and with rice expressed sequence tag (EST)-derived markers selected from a rice EST map of chromosome (Chr) 1 since LG 3 of ryegrasses are syntenic to rice Chr 1. Quantitative trait locus (QTL) analysis with the genetic linkage map and phenotypic data of the F1 population detected a major locus for GLS resistance. Proportions of phenotypic variance explained by the QTL at the highest logarithm of odds scores were 61.0–69.5%.ConclusionsA resistance locus was confirmed as novel for GLS resistance, because its genetic position was different from other known loci for GLS resistance. Broad-sense heritability and the proportion of phenotypic variance explained by the QTL were similar, suggesting that most of the genetic factors for the resistance phenotype against GLS in the F1 population can be explained by a function of the single resistance locus. We designated the putative gene for the novel resistance locus as LmPi2. LmPi2 will be useful for future development of GLS-resistant cultivars in combination with other resistance genes.Electronic supplementary materialThe online version of this article (doi:10.1186/s12870-014-0303-6) contains supplementary material, which is available to authorized users.

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Italian ryegrass silage in winter feeding of organic dairy cows: forage intake, milk yield and composition

Cited by 25 publications

References 15 publications

Feeding of by-products completely replaced cereals and pulses in dairy cows and enhanced edible feed conversion ratio

Feeding of by-products completely replaced cereals and pulses in dairy cows and enhanced edible feed conversion ratio

Dynamics of Neotyphodium uncinatum and N -formylloline in Italian ryegrass, and their relation to insect resistance in the field

Identification of a novel major locus for gray leaf spot resistance in Italian ryegrass (Lolium multiflorumLam.)

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