体外法研究不同磷添加水平对奶牛瘤胃发酵的影响

本试验采用体外法研究无机磷对瘤胃发酵的影响。无机磷在培养液中设0、30、60、90、120、150、200、250、300、350 mg/L 10个水平。体外培养发酵48 h终止培养,测定培养液的产气量和干物质降解率。结果表明:无机磷添加水平对48 h总产气量和干物质降解率影响显著(P<0.05),随着无机磷添加水平的提高,48 h总产气量和干物质降解率显著提高(P<0.05),添加水平为200 mg/L时达到最大值,分别为44.30 mL和54.80%,随后下降。在本试验条件下,无机磷的适宜添加水平为200 mg/L。

Study on effects of different level of phosphorus supplementation on rumen fermentation in daffy cow in vitro

The effects of inorganic phosphorus on rumen fermentation in vitro were studied.The concentration of inorganic phosphorus were 0,30,60,90,120,150,200,250,300 mg/L and 350 mg/L.The gas production and dry matter(DM) digestibility of 48 h fermentation in vitro were measured.The results were as follows:different inorganic phosphorus levels significantly influenced the gas production and DM digestibility by 48 h fermentation in vitro(P < 0.05);the gas production and DM digestibility increased and reached its max...