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Cited by 12Ruminant Nutrition and Digestive PhysiologyPasture and Agricultural SystemsAgricultural Productivity and Crop Improvement

Nonstructural carbohydrate concentration during field wilting of PM- and AM-cut alfalfa

Morin, Chantale, Tremblay, Gaëtan F., Bélanger, Gilles, Bertrand, Annick, Castonguay, Yves, Drapeau, Raynald, Michaud, Réal, Berthiaume, Robert +1 more·2012·Agronomy Journal
DOI 10.2134/agronj2011.0365
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Abstract

Alfalfa (Medicago sativa L.) cut in the late afternoon has a greater nonstructural carbohydrate (NSC) concentration than AM‐cut alfalfa but this difference might not be maintained during wilting. We monitored NSC concentration of PM‐ and AM‐cut alfalfa during wilting in narrow and wide swaths. Field‐grown alfalfa was cut either at 1800 h (PM) on days without rain (Day 0) or at 0800 h (AM) the following morning (Day 1) in seven growth cycles over 3 yr. Samples taken during wilting were analyzed for NSC (soluble carbohydrates + starch). At cutting, PM‐cut alfalfa had consistently greater NSC concentration [+6 to 54 g kg−1 of dry matter (DM)] than AM‐cut alfalfa. The NSC concentration decreased during wilting at rates that depended on growth cycles (0.2–3.5 g kg−1 DM h−1 on Day 1) but this decline was similar for AM‐ and PM‐cut alfalfa. When cut alfalfa reached 350 g DM kg−1 fresh matter (FM) on Day 1, NSC concentration was greater for PM‐ than for AM‐cut alfalfa (average of 15 with a range of 4–37 g kg−1 DM) and greater for the wide than narrow swaths (average of 7 with a range of 1–11 g kg−1 DM). Photosynthesis continued for 3 h on the morning of AM cutting for both PM‐ and AM‐cut alfalfa until DM concentration reached approximately 350 g DM kg−1 FM. The combination of late PM‐cutting and wilting in wide swaths can be used to increase the NSC concentration of wilted alfalfa.

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  • Cutting alfalfa in the afternoon increased the content of simple carbohydrates before wilting by 17, 18, and 22% in spring, summer, and fall, respectively, compared with cutting in the morning.

    “Cutting alfalfa in the afternoon increased the content of simple carbohydrates before wilting by 17, 18, and 22% in spring, summer, and fall, respectively, compared with cutting the forage in the morning (Morin et al., 2012).”

    From Silage review: Factors affecting dry matter and quality losses in silages (2018) · cites this paper as Morin et al., 2012

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Authors
Morin, C., Tremblay, G. F., Bélanger, G., Bertrand, A., Castonguay, Y., Drapeau, R., Michaud, R., Berthiaume, R., & Allard, G.
Affiliations
  • Université Laval (CA)
  • Agriculture and Agri-Food Canada (CA)
Corresponding author
Tremblay, Gaëtan F.
ORCID
Venue
Agronomy Journal
Publisher
Wiley
Published
2012-05
Volume
104
Issue
3
Pages
649-660
ISSN
  • 0002-1962 (ISSN-L)
  • 1435-0645
DOI
10.2134/agronj2011.0365
OpenAlex
W1967367959
Cited by
12
References
36
Citations by year
2024: 2 · 2023: 1 · 2019: 1 · 2018: 2 · 2015: 1 · 2014: 1 · 2013: 3 · 2012: 1
FWCI
3.86
Type
journal article
Language
en
Open access
closed
Licence
onlinelibrary.wiley.com/termsAndConditions#vor (vor)
Locations
Agronomy Journal (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Ruminant Nutrition and Digestive Physiology
  • Life Sciences › Agricultural and Biological Sciences › Forestry › Pasture and Agricultural Systems
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Agricultural Productivity and Crop Improvement
Keywords
alfalfa, non-structural carbohydrates, wilting, cutting time, swath width, soluble sugars, starch, photosynthesis, forage quality, dry matter content

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