About Us | Help Videos | Contact Us | Subscriptions
 

Abstract

 

This article in AJ

  1. Vol. 83 No. 4, p. 659-663
     
    Received: Feb 21, 1990


    * Corresponding author(s):
 View
 Download
 Alerts
 Permissions
 Share

doi:10.2134/agronj1991.00021962008300040002x

Laboratory System for Evaluation of Hay Preservatives

  1. V. S. Baron ,
  2. A. C. Dick and
  3. D. G. Young
  1. Agriculture Canada, Research Branch, Lacombe Research Station, Lacombe, Alberta, Canada TOC ISO.

Abstract

Abstract

The evaluation of additives for the preservation of moist hay through field experiments is made difficult by large and variable experimental units and environmental effects. A laboratory system was developed to rapidly screen hay preservative treatments. Ovendried hay was rehydrated with water and a preservative to the desired moisture concentration. Polyvinyl chloride (PVC) tubes provided the storage vessel. A constant initial density (200 kg m−3) was achieved using a mechanical press. Aeration was by dausion through the open vessel top. Resistance to heat loss was provided by a fixed, polystyrene bed into which PVC tubes were inserted during a 21-d incubation at 25 °C. Temperature data handling was facilitated through the use of a mutiplexer and datalogger. Efficacy of a propionate preservative duplicated the performance of previous laboratory systems for temperature and visible mold evaluation. Forage quality parameters followed the same general response to propionate rate within moisture levels as temperature and mold evaluation. Daily temperatures in the laboratory model were comparable to conventional small square bales, but lower than in large round bales.

Scientific Paper no. 635.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © .