Abstract
Abstract BACKGROUND Perennial legumes cultivated under irrigation in the Mountain West USA have non‐fibrous carbohydrate (NFC) concentrations exceeding 400 g kg −1 , a level commonly found in concentrate‐based ruminant diets. Our objective was to determine the influence of NFC concentration and plant secondary compounds on in vitro rumen digestion of grass, legume and forb forages compared with digestion of their isolated neutral detergent fiber (NDF) fraction. Forages were composited from ungrazed paddocks of rotationally stocked, irrigated monoculture pastures between May and August 2016, frozen in the field, freeze‐dried, and ground. RESULTS The maximum rate (R Max ) of gas production was greater for the legumes alfalfa (ALF; Medicago sativa L.) and birdsfoot trefoil (BFT; Lotus corniculatus L.) than for the legume cicer milkvetch (CMV; Astragalus cicer L.) the grass meadow brome (MBG; Bromus riparius Rehm.) and the non‐legume forb small burnet (SMB; Sanguisorba minor Scop.), and intermediate for the legume sainfoin (SNF; Onobrychis viciifolia Scop.). The R Max of isolated NDF was greatest for BFT and CMV, intermediate for ALF, SNF and SMB and least for MBG. CONCLUSIONS More than 900 g of organic matter kg −1 dry matter of legumes was digested after 96 h. Across forages, the extent of whole‐plant digestion increased with NFC and crude protein concentrations, decreased with NDF concentrations, and was modulated by secondary compounds. The extent of digestion of isolated NDF decreased with concentration of lignin and residual tannins. © 2020 Society of Chemical Industry
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Claims 13
Claim · model-written summary
The maximum rate of gas production of alfalfa was greater than that of cicer milkvetch.
- Taxon
- alfalfa
Medicago sativae4 - Outcome
- maximum rate (R Max ) of gas productione4
- Direction
- greatere4
- Comparator
- cicer milkvetche4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The maximum rate (R Max ) of gas production was greater for the legumes alfalfa (ALF; Medicago sativa L.) and birdsfoot trefoil (BFT; Lotus corniculatus L.) than for the legume cicer milkvetch (CMV; Astragalus cicer L.)”
Claim · model-written summary
The maximum rate of gas production of birdsfoot trefoil was greater than that of cicer milkvetch.
Verbatim
e4“The maximum rate (R Max ) of gas production was greater for the legumes alfalfa (ALF; Medicago sativa L.) and birdsfoot trefoil (BFT; Lotus corniculatus L.) than for the legume cicer milkvetch (CMV; Astragalus cicer L.)”
Claim · model-written summary
The maximum rate of isolated NDF digestion was greatest for birdsfoot trefoil.
Verbatim
e3“The R Max of isolated NDF was greatest for BFT and CMV, intermediate for ALF, SNF and SMB and least for MBG”
Claim · model-written summary
The maximum rate of isolated NDF digestion was greatest for cicer milkvetch.
- Taxon
- CMV
cucumber mosaic cucumoviruse3 - Treatment
- isolated NDFe3
- Outcome
- R Max of isolated NDFe3
- Direction
- greateste3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The R Max of isolated NDF was greatest for BFT and CMV, intermediate for ALF, SNF and SMB and least for MBG”
Claim · model-written summary
The maximum rate of isolated NDF digestion was least for meadow brome.
- Taxon
- MBG
Orthomarburgvirus marburgensee3 - Treatment
- isolated NDFe3
- Outcome
- R Max of isolated NDFe3
- Direction
- leaste3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The R Max of isolated NDF was greatest for BFT and CMV, intermediate for ALF, SNF and SMB and least for MBG”
Claim · model-written summary
The maximum rate of isolated NDF digestion was intermediate for alfalfa.
Verbatim
e3“The R Max of isolated NDF was greatest for BFT and CMV, intermediate for ALF, SNF and SMB and least for MBG”
Claim · model-written summary
The maximum rate of isolated NDF digestion was intermediate for sainfoin.
Verbatim
e3“The R Max of isolated NDF was greatest for BFT and CMV, intermediate for ALF, SNF and SMB and least for MBG”
Claim · model-written summary
The maximum rate of isolated NDF digestion was intermediate for small burnet.
Verbatim
e3“The R Max of isolated NDF was greatest for BFT and CMV, intermediate for ALF, SNF and SMB and least for MBG”
Claim · model-written summary
Across forages, the extent of whole-plant digestion increased with NFC and crude protein concentrations.
Verbatim
e0“Across forages, the extent of whole‐plant digestion increased with NFC and crude protein concentrations, decreased with NDF concentrations, and was modulated by secondary compounds”
Claim · model-written summary
Across forages, the extent of whole-plant digestion decreased with NDF concentrations.
Verbatim
e0“Across forages, the extent of whole‐plant digestion increased with NFC and crude protein concentrations, decreased with NDF concentrations, and was modulated by secondary compounds”
Claim · model-written summary
Across forages, the extent of whole-plant digestion was modulated by secondary compounds.
Not reportedDirection
Verbatim
e0“Across forages, the extent of whole‐plant digestion increased with NFC and crude protein concentrations, decreased with NDF concentrations, and was modulated by secondary compounds”
Claim · model-written summary
The extent of digestion of isolated NDF decreased with lignin and residual tannin concentrations.
Verbatim
e0“Across forages, the extent of whole‐plant digestion increased with NFC and crude protein concentrations, decreased with NDF concentrations, and was modulated by secondary compounds”
e1“The extent of digestion of isolated NDF decreased with concentration of lignin and residual tannins”
Claim · model-written summary
More than 900 g of organic matter per kg dry matter of legumes was digested after 96 h.
Verbatim
e2“More than 900 g of organic matter kg −1 dry matter of legumes was digested after 96 h”