The Effect of Drying Methods on Water-Soluble Carbohydrates and Crude Protein Concentrations and Their Ratio in Two Perennial Ryegrass Cultivars

A - Papers appearing in refereed journals

Moscoso, C. J., Morgan, S. A. and Rivero, M. J. 2019. The Effect of Drying Methods on Water-Soluble Carbohydrates and Crude Protein Concentrations and Their Ratio in Two Perennial Ryegrass Cultivars. Agronomy. 9 (7), p. 383.

AuthorsMoscoso, C. J., Morgan, S. A. and Rivero, M. J.
Abstract

The objective of this study was to assess the joint effect of perennial ryegrass cultivars and drying methods on concentrations of water-soluble carbohydrates (WSC) and crude protein (CP) and WSC/CP ratio. AberMagic AR1 and Expo AR1 forage were collected in December 2016, March, June, September and November 2017 and either oven-dried at 60 °C for 48h (OD_60), at 80 °C for 16h (OD_80), frozen at -80 °C for 48h then freeze-dried (-80_FD), or flash-frozen with liquid N then freeze-dried (LN_FD). Data were analyzed by ANOVA in a factorial design with cultivar and drying method as factors. AberMagic AR1 had between 9.0 to 31.5% higher WSC concentration than Expo AR1 in the four samplings. Freeze-drying preserved more WSC than oven-drying treatments (+22.7%), particularly in June. The CP concentration of Expo AR1 was higher only in December (+6.8%), and was 22.9 and 10.9% higher in OD_60 samples compared to LN_FD samples in December and November, respectively. The WSC/CP ratio varied in June, being greater in AberMagic AR1 (+36.1%). Drying method affected WSC/CP ratio in December, June and November where freeze-drying produced greater ratios. Drying techniques generated differences in WSC, CP and WSC/CP ratio, which may affect the accuracy of the estimated impacts of forages on productivity and N use efficiency.

KeywordsLolium perenne; Leaves; High sugar grasses; Oven-drying; Freeze-drying; Liquid nitrogen; Nitrogen use efficiency
Year of Publication2019
JournalAgronomy
Journal citation9 (7), p. 383
Digital Object Identifier (DOI)doi:10.3390/agronomy9070383
Open accessPublished as green open access
Funder project or codeS2N - Soil to Nutrition - Work package 2 (WP2) - Adaptive management systems for improved efficiency and nutritional quality
Agri-Tech Cornwall
FunderBiotechnology and Biological Sciences Research Council
European Union
Publisher's versionagronomy-09-00383.pdf
Output statusPublished
Publication dates
Online16 Jul 2019
Publication process dates
Accepted14 Jul 2019
PublisherMDPI
ISSN2073-4395

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