2005•Xumu shouyi xuebaoRequires access

Effects of Forage to Concentrate Ratio on Pattern of Rumen Fermentation and Performance of Lactating Dairy Cows

Wang JiFeng

Abstract

Effects of forage to concentrate ratio on dynamic changes of pH, NH_3-N concentration, VFA pattern of rumen fermentation were studied. Four Holstein cows with rumenal cannula in mid lactation were used in 4×4 Latin square design experiment with 23 d each period. Dietary forage to concentrate ratios were 30∶70CW(forage was composed of Chinese wildrye,CW), 30∶70CCA(forage was composed of corn silage, Chinese wildrye and alfalfa, blend), 50∶50CCA and 65∶35CCA, respectively. The results indicated there were significant changes in pH value and ammonia N concentration (P0.05), acetate tended to be higher in 30∶70CW (P=0.10), acetate to propionate ratio and butyrate concentration in the rumen were significantly different (P0.01). Milk fat percentages were significant different (P0.01), highest in 30∶70(blend); Milk yield, protein percentages, and solid non-fat (SNF) contents were significantly different (P0.01).

About this research paper

What this paper is about

Why it matters

OpenAlex reports 3 citations for this work. Citation counts describe recorded attention and do not establish research quality.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

Key concepts: Propionate, Rumen, Forage, Latin square, Biology, Fermentation, Animal science, Silage