HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Brundage, A. L. Search for Related Content PubMed Articles by Brundage, A. L.

Daily Herbage Digestibility Under Rotational and Strip Grazing

Alaska Agricultural Experiment Station, Palmer

ABSTRACT

The apparent dry matter digestibility of daily herbage consumption by eight dairy cows, rotationally and daily strip grazing alfalfa-bromegrass pasture (Medicago falcata and Bromus inermis) in 1957, was determined from fecal concentrations of plant pigments. Feces, sampled in the morning and afternoon, were composited into daily and three-day running average samples. Digestibility data obtained from the two series of samples were similar. Statistical comparison of these data revealed that the three-day samples corresponded best with the middle day represented in eaeh composite. Further statistical analysis showed significantly higher partial correlations of milk production and digestibility independent of the linear effects of time, using data from three-day rather than from daily samples. Examining the relationship of daily milk production to time, herbage digestibility, and live weight through multiple correlation analyses, it was found that milk production was significantly related to all three variables under rotational grazing. Although milk production was also related significantly to all three variables under strip grazing, the addition of digestibility did not improve the multiple correlation of milk production, time, and live weight.