Short communication: Effects of replacing part of corn silage and alfalfa hay with Leymus chinensis hay on milk production and composition

Yan, Ruirui; Chen, Shicheng; Zhang, Xian; Han, Jing; Zhang, Y.; Undersander, D. J.

doi:10.3168/jds.2010-3536

Cited by 23 publications

(26 citation statements)

References 9 publications

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“…In addition, there was no difference in milk yield for cows fed diets containing AH, OH, LC, and RS as the main source of forage fiber. In some previous studies, the increased DMI was the primary reason for increased milk production (Yan et al, 2011), and the lack of difference in DMI may be due to the similar milk yield among the treatments (averaging 24.39 kg/d). Gencoglu et al (2007) observed that DMI, 4% FCM, and milk yield were similar in cows fed wheat straw compared to chopped alfalfa hay in the diets.…”

Section: Discussionmentioning

confidence: 93%

Effects of Forage Sources on Rumen Fermentation Characteristics, Performance, and Microbial Protein Synthesis in Midlactation Cows

Xu¹,

Hou²,

Yang³

et al. 2014

Asian Australas. J. Anim. Sci

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Eight multiparous Holstein cows (632±12 kg BW; 135±16 DIM) were used in a replicated 4×4 Latin square design to evaluate the effects of forage sources on rumen fermentation characteristics, performance, and microbial protein (MCP) synthesis. The forage portion of the diets contained alfalfa hay (AH), oat hay (OH), Leymus chinensis (LC), or rice straw (RS) as the primary source of fiber. Diets were isonitrogenous and isocaloric, and cows were fed four corn silages based total mixed rations with equivalent nonfiber carbohydrate (NFC) and forage neutral detergent fiber (NDF). Dry matter intake was not affected by the source of dietary forages, ranging from 18.83 to 19.20 kg/d, consequently, milk yield was similar among diets. Because of the numerical differences in milk fat and milk protein concentrations, 4% FCM and ECM yields were unchanged (p>0.05). Mean rumen pH, NH3-N content, and concentrations of volatile fatty acids in the rumen fluid were not affected by the treatments (p>0.05). Dietary treatments did not affect the total tract apparent digestibility of dry matter, organic matter, and crude protein (p>0.05); however, digestibility of NDF and acid detergent fiber in RS diet was higher compared with AH, OH, and LC diets (p<0.05). Total purine derivative excretion was higher in cows fed AH, OH, and LC diets compared with those fed RS diet (p<0.05), consequently, estimated MCP synthesis was 124.35 g/d higher in cows fed AH diet compared with those fed RS diet (p<0.05). The results indicated that cows fed AH, OH, LC, and RS diets with an equivalent forage NDF and NFC have no unfavourable effect on the ruminal fermentation and productive parameters.

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Section: Discussionmentioning

confidence: 93%

Effects of Forage Sources on Rumen Fermentation Characteristics, Performance, and Microbial Protein Synthesis in Midlactation Cows

Xu¹,

Hou²,

Yang³

et al. 2014

Asian Australas. J. Anim. Sci

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“…; Yan et al . ). In China, alfalfa ( Medicago sativa L.) has been cultivated extensively in recent years.…”

Section: Introductionmentioning

confidence: 97%

Isolating and evaluating lactic acid bacteria strains with or without sucrose for effectiveness of silage fermentation

Zhang

Wang

2015

Grassland Science

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The aim of this study was to screen and evaluate lactic acid bacteria strains for their ability to ferment alfalfa, Leymus chinensis and native grass into silage. We isolated 186 lactic acid bacteria strains from alfalfa, native grass and selected eight strains by acid production test and growth rate test. The eight stains were identified using morphological observations, Gram staining, physiological and biochemical tests, an acid tolerance test and 16S rDNA sequencing. All eight strains (LP1, LP2, LC1, LC2, PP1, PP2, EF1 and EF2) grew at pH 4.0 and 6.5%NaCl. Strains LP1 and LP2 were identified as Lactobacillus plantarum, LC1 and LC2 as Lactobacillus casei, PP1 and PP2 as Pediococcus pentosaceus, EF1 as Enterococcus faecalis, and EF2 as Enterococcus faecium based on their 16S rDNA sequences. The eight strains and two commercial inoculants (PS and CL) were added with or without sucrose to native grass, L. chinensis, and alfalfa to produce silage. All eight screened strains decreased the pH and ammonia nitrogen (N) content and increased the lactic acid content of alfalfa silages. No butyric acid was detected in the L. chinensis and alfalfa silages. Addition of sucrose with the screened strains resulted in lower pH and ammonia N content, and higher lactic acid content and total fermentation acids content in all three silages. The eight strains improved the fermentation quality of alfalfa silage. All strains were more effective when supplemented with sucrose. No efficient lactic acid bacteria strain was found for ensiling the native grass, but the high fermentation quality native grass silage could be obtained using the combination of lactic acid bacteria strains and 2% sucrose.

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“…Because of the economic importance of sheepgrass, the utilization and improvement of sheepgrass feedstocks have been broadly studied during the past decades (Chen et al, 2002, 2015; Wang et al, 2009). A good balanced diet for cows has been achieved by replacing part of corn silage and alfalfa hay with sheepgrass hay (Yan et al, 2011). However, the forage digestibility is highly variable in different sheepgrass germplasms (Xu and Zhou, 2006).…”

Section: Introductionmentioning

confidence: 99%

Lignification of Sheepgrass Internodes at Different Developmental Stages and Associated Alteration of Cell Wall Saccharification Efficiency

Wang¹,

Shen³

et al. 2017

Front. Plant Sci.

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Sheepgrass (Leymus chinensis) is a high-quality cool-season forage crop used as pasture and hay for livestock feeds. The presence of lignin in cell walls, however, impairs forage digestibility of such lignocellulosic feedstock. Here, the structural characterization and cell wall composition of sheepgrass internodes were studied, and a progressive increase in cell wall lignification was observed with internode maturation. Lignin composition analysis further revealed a gradual accumulation of guaiacyl and syringyl lignin units during internode development. Consistently, the transcript abundance of lignin-related genes was upregulated in mature internodes, suggesting their potential roles in lignin biosynthesis. Furthermore, the effects of cell wall composition and lignification extent on biomass saccharification efficiency were examined in sheepgrass. The results showed that lignin content, guaiacyl and syringyl lignin unit levels inversely correlated with cell wall digestibility, indicating that lignin is a crucial obstacle for utilizing sheepgrass feedstock. The baseline information obtained in this work will facilitate establishment, grazing management, harvesting and feedstock utilization of sheepgrass in future.

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Short communication: Effects of replacing part of corn silage and alfalfa hay with Leymus chinensis hay on milk production and composition

Cited by 23 publications

References 9 publications

Effects of Forage Sources on Rumen Fermentation Characteristics, Performance, and Microbial Protein Synthesis in Midlactation Cows

Effects of Forage Sources on Rumen Fermentation Characteristics, Performance, and Microbial Protein Synthesis in Midlactation Cows

Isolating and evaluating lactic acid bacteria strains with or without sucrose for effectiveness of silage fermentation

Lignification of Sheepgrass Internodes at Different Developmental Stages and Associated Alteration of Cell Wall Saccharification Efficiency

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