scholarly journals PSXI-42 Assessment of the inclusion of prairie clovers in native cool-season grass pastures on the nutritive value of forage using in vitro ruminal incubation.

2018 ◽  
Vol 96 (suppl_3) ◽  
pp. 226-227
Author(s):  
Y Wang ◽  
G Gresham ◽  
K Peng ◽  
A Chaves ◽  
T McAllister ◽  
...  
Keyword(s):  
Nutritive Value ◽  
Cool Season ◽  
Cool Season Grass

PSXIII-2 Effect of varying proportions of cereal rye and turnip on ruminal fermentation and methane output through in vitro batch culture

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 461-461
Author(s):  
Jordan L Cox-O’Neill ◽  
Vivek Fellner ◽  
Alan J Franluebbers ◽  
Deidre D Harmon ◽  
Matt H Poore ◽  
...  
Keyword(s):  
Methane Production ◽  
Dry Matter ◽  
Ruminal Fermentation ◽  
Variable Response ◽  
Cool Season ◽  
Cereal Rye ◽  
Freeze Dried ◽  
Main Effect ◽  
Cool Season Grass

Abstract Ruminant animal performance has been variable in studies grazing annual cool-season grass and brassica monocultures and mixtures. There is little understanding of the fermentation mechanisms causing variation. The aim of this study was to determine apparent dry matter (DM) digestibility, methane, and volatile fatty acid (VFA) concentration from different proportions of cereal rye (Secale cereal; R) and turnip (Brassica rapa L.; T) (0R:100T, 40R:60T, 60R:40T, and 100R:0T) via in vitro batch fermentation. Freeze-dried forage samples from an integrated crop-livestock study was assembled into the four treatments with a 50:50 leaf to root ratio for turnip. Measurements were made following a 48 hr fermentation with 2:1 buffer and ruminal fluid inoculum. Data were analyzed using Mixed Procedure of SAS with batch (replicate) and treatment (main effect) in the model; differences were declared at P ≤ 0.05, with tendencies declared at > 0.05 but < 0.10. Rumen apparent DM digestibility (26.8%; overall mean) was not different among treatments. Methane production was less (P < 0.01) with inclusion of turnip ranging from 774 nmol/ml for 0R:100T to 1416 nmol/ml for 100R:0T. Total VFA production, acetate to propionate ratio, acetate, and valerate were not affected by forage treatments (117 mM, 1.45, 39.84 mol/100 mol, and 7.86 mol/100 mol, respectively; overall mean). Propionate, isobutyrate, and isovalerate concentrations were greater and butyrate concentration less with greater (P < 0.01) proportions of rye in the mixture. No effect of R:T ratio on digestibility or total VFA production along with the observed differences in individual VFA concentration do not explain variable response in grazing animals. Additionally, methane production results indicate that grazing turnips could potentially reduce methane production and thus reduce ruminant livestock’s contribution to greenhouse gas emissions.

Nutritive Value of Virginia Wildrye, a Cool-Season Grass Native to the Northeast USA

Crop Science ◽  
2009 ◽  
Vol 49 (6) ◽  
pp. 2416-2416
Author(s):  
Matt A. Sanderson ◽  
R. Howard Skinner ◽  
Martin van der Grinten ◽  
Jennifer Kujawski
Keyword(s):  
Nutritive Value ◽  
Cool Season ◽  
Northeast Usa ◽  
Cool Season Grass

Relationships of Forage Nutritive Value to Cool‐Season Grass Canopy Characteristics

Crop Science ◽  
2013 ◽  
Vol 53 (1) ◽  
pp. 341-348 ◽  
Author(s):  
Renata La Guardia Nave ◽  
R. Mark Sulc ◽  
David J. Barker
Keyword(s):  
Nutritive Value ◽  
Cool Season ◽  
Cool Season Grass

Changes in Forage Nutritive Value among Vertical Strata of a Cool-Season Grass Canopy

Crop Science ◽  
2014 ◽  
Vol 54 (6) ◽  
pp. 2837-2845 ◽  
Author(s):  
Renata L. G. Nave ◽  
R. Mark Sulc ◽  
David J. Barker ◽  
Normand St-Pierre
Keyword(s):  
Nutritive Value ◽  
Cool Season ◽  
Cool Season Grass

Nutritive Value of Virginia Wildrye, a Cool‐Season Grass Native to the Northeast USA

Crop Science ◽  
2004 ◽  
Vol 44 (4) ◽  
pp. 1385-1390 ◽  
Author(s):  
Matt A. Sanderson ◽  
R. Howard Skinner ◽  
Martin Grinten ◽  
Jennifer Kujawski
Keyword(s):  
Nutritive Value ◽  
Cool Season ◽  
Northeast Usa ◽  
Cool Season Grass

Short Communication: Effect of condensed tannin on in vitro ruminal fermentation of purple prairie clover (Dalea purpureaVent)–cool-season grass mixture

2013 ◽  
Vol 93 (1) ◽  
pp. 155-158 ◽  
Author(s):  
L. Jin ◽  
Y. Wang ◽  
A. D. Iwaasa ◽  
Z. Xu ◽  
M. P. Schellenberg ◽  
...  
Keyword(s):  
Protein Synthesis ◽  
Dry Matter ◽  
Short Communication ◽  
Condensed Tannin ◽  
Ruminal Fermentation ◽  
Microbial Protein ◽  
Cool Season ◽  
Microbial Protein Synthesis ◽  
Cool Season Grass

Jin, L., Wang, Y., Iwaasa, A. D., Xu, Z., Schellenberg, M. P., Zhang, Y. G. and McAllister, T. A. 2013. Short Communication: Effect of condensed tannin on in vitro ruminal fermentation of purple prairie clover ( Dalea purpurea Vent)–cool- season grass mixture. Can. J. Anim. Sci. 93: 155–158. Four purple prairie clover [Dalea purpurea Vent (PPC)]–/grass mixtures containing 7.3, 14.0, 29.3 and 42.1 g kg−1dry matter (DM) of condensed tannin (CT) were incubated with rumen fluid. As the CT increased, in vitro true dry matter disappearance (IVTDMD), production of volatile fatty acids (VFA) and microbial protein synthesis were linearly increased (P<0.05) at 12 h, and IVTDMD and VFA were quadratically increased (P<0.01) at 48-h incubation. Molar proportion of acetate was linearly increased (P<0.01) but propionate and butyrate were decreased (P<0.05) at both 12 and 48-h incubation. Incorporation of PPC into cool-season grass pasture up to CT content of 42 g kg−1DM improved ruminal fermentability and microbial protein synthesis in mixed forages.

scholarly journals Seeding Rate Effects on Forage Mass and Vegetation Dynamics of Cool-Season Grass Sod Interseeded with Sorghum-Sudangrass

Agronomy ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 2449
Author(s):  
John A. Guretzky ◽  
Daren D. Redfearn
Keyword(s):  
Vegetation Dynamics ◽  
Nutritive Value ◽  
Perennial Grass ◽  
Warm Season ◽  
Residual Effects ◽  
Control Treatment ◽  
Seeding Rate ◽  
Cool Season ◽  
Sorghum Sudangrass ◽  
Cool Season Grass

Interseeding annual warm-season grasses into perennial cool-season grasses has the potential to increase summer forage mass and nutritive value. Knowledge of how seeding rate affects annual warm-season grass establishment, forage mass, and vegetation dynamics remains limited. From 2016–2017, we conducted a field experiment evaluating the effects of seeding rates on sorghum-sudangrass (Sorghum bicolor × S. bicolor var. sudanense) density and forage mass and on the frequency of occurrence of plant species in cool-season grass sod in Lincoln, NE. The experiment had a completely randomized design consisting of six replicates of four seeding rates [0, 14, 28, and 35 kg pure live seed (PLS) ha−1] in sod mowed at a 2.5-cm height and one unseeded, non-mowed control treatment. Sorghum-sudangrass establishment increased with seeding rate from an average of 20 to 45 plants m−2 as the seeding rate increased from 14 to 35 kg PLS ha−1. Forage mass depended on a seeding rate × harvest interaction, showing positive linear and cubic responses to seeding rate in consecutive harvests at 45 and 90 d after interseeding. To increase forage mass in perennial cool-season grass sod, producers should interseed sorghum-sudangrass with at least 28 kg PLS ha−1. One-time seedings into cool-season, perennial grass sod have no residual effects on subsequent forage mass and vegetation dynamics.

scholarly journals Partitioning of Forage Mass and Nutritive Value in Sunn Hemp Leaf and Stem Components

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Isaac Lepcha ◽  
Harley D. Naumann
Keyword(s):  
Crude Protein ◽  
Nutritive Value ◽  
Warm Season ◽  
Growing Season ◽  
Neutral Detergent Fiber ◽  
Cool Season ◽  
Acid Detergent Fiber ◽  
True Digestibility ◽  
Sunn Hemp

Sunn hemp (SH; Crotalaria juncea L.) is a fast-growing, annual, warm-season tropical legume that could complement less productive cool-season forages such as tall fescue during summer. Little is known about seasonal forage mass and nutritive value partitioning in SH plant components when SH is managed for forage. We determined partitioning of forage mass and nutritive value (crude protein (CP), in vitro true digestibility (IVTD), neutral detergent fiber (NDF), acid detergent fiber (ADF), and neutral detergent fiber digestibility (NDFD)) concentrations in SH leaves and stems harvested 35, 45, and 55 days after planting (DAP) at Bradford Research Center, Columbia, MO, in a 2-year field study. Leaf and stem mass increased with increasing DAP and was greatest ( P ≤ 0.05 ) at 55 DAP followed by 45 and 35 DAP. Stems contributed most to the total forage mass beyond 45 DAP. Across years, CP was greatest ( P ≤ 0.05 ) in leaves (281 g kg−1 DM) and lowest for stems (81 g kg−1 DM) at 55 DAP. The lowest NDF ( P ≤ 0.05 ) was observed in leaves (251 g kg−1 DM) and stems (585 g kg−1 DM) at 35 DAP. Acid detergent fiber was lowest ( P ≤ 0.05 ) for SH leaves (178 g kg−1 DM) and stems (484 g kg−1 DM) at 35 DAP. Digestibility of leaves was greater than that of stems and generally decreased with maturity. The nutritive value of leaves was consistently greater than that of stems and decreased with maturity, except for CP of leaves, which was maintained throughout the season. Results suggested that SH leaves can maintain forage mass and greater quality than its stem throughout the growing season.

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