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Estimation of nutritive value of spring alfalfa-grass mixtures using in-field measurements and growing degree data

Citation

Parsons, D and Peterson, PR and Cherney, JH, Estimation of nutritive value of spring alfalfa-grass mixtures using in-field measurements and growing degree data, Forage and Grazinglands, 11, (1) pp. 1-7. ISSN 1547-4631 (2013) [Refereed Article]

Copyright Statement

Copyright 2013 Plant Management Network

DOI: doi:10.1094/FG-2012-0162-RS

Abstract

Rapid estimation of forage nutritive value can help producers manage time of harvesting for mixed alfalfa–grass stands. In New York State, equations have been developed for neutral detergent fiber (NDF) estimation; however, other measures of nutritive value may be favored by some producers. Equations were developed to estimate spring growth nutritive value of mixed stands of alfalfa– grass in New York State using easily available measurements. There was a strong relationship between NDF derived from wet chemistry and near infrared spectroscopy (NIRS) for both grass and alfalfa fractions. For NDF, acid detergent fiber (ADF) and relative feed value (RFV), models incorporating the fraction of grass in the sample (GFRAC) and the maximum alfalfa height (MAXHT) had the greatest predictive accuracy. For NDF digestibility (NDFD) and relative forage quality (RFQ), models incorporating growing degree days (GDD) had the greatest predictive accuracy, although further evaluation is necessary.

Item Details

Item Type:Refereed Article
Keywords:alfalfa, lucerne, PEAQ, neutral detergent fiber
Research Division:Agricultural and Veterinary Sciences
Research Group:Crop and Pasture Production
Research Field:Agronomy
Objective Division:Animal Production and Animal Primary Products
Objective Group:Livestock Raising
Objective Field:Dairy Cattle
Author:Parsons, D (Dr David Parsons)
ID Code:88839
Year Published:2013
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2014-02-18
Last Modified:2014-08-06
Downloads:0

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