Loline alkaloids in tall fescue hay and seed and their relationship to summer fescue toxicosis in cattle.
Loline alkaloids in tall fescue hay and seed and their relationship to summer fescue toxicosis in cattle.
复制标题
高羊茅干草和种子中的黑麦草生物碱及其与牛夏季羊茅中毒的关系。
DOI：
10.3168/jds.s0022-0302(84)81272-2
复制
发表时间：
1984
影响因子：
3.5
通讯作者：
Lowell P. Bush
中科院分区：
文献类型：
--
作者：
J. Jackson;R. Hemken;J. Boling;R. J. Harmon;R. C. Buckner;Lowell P. Bush
在三个试验中，在受控环境房间中，饲养在约束型板条箱中的年轻荷斯坦牛被喂以高羊茅干草或种子日粮，以确定这些日粮产生夏季综合症迹象的能力。试验一比较了G1-307羊茅和紫花苜蓿在脱水和延长贮藏条件下对奶牛的影响。与饲喂紫花苜蓿干草的羔牛相比，饲喂G1-307羊茅的犊牛日采食量低，直肠温度和呼吸频率高，体重多减重13.4 kg。在试验2中，使用苯菌灵(一种全身杀菌剂)来清除处理过的G1-307羊茅植株上的褐斑病。与饲喂未处理的G1-307羊茅相比，饲喂处理的G1-307羊茅后代的肉牛在试验期内的日采食量更高，直肠温度更低，呼吸频率更低，体重损失更少。在试验3中，饲喂含和不含N-乙酰和N-甲酰胆碱的高羊茅种子和对照日粮。与饲喂不含牛胆碱的牛相比，饲喂含牛胆碱的牛的摄食量减少，直肠温度升高，体重多减重10.9公斤。
In three trials, young Holstein steers housed in restraint type crates in a controlled environment room were fed tall fescue hay or seed diets to determine the ability of the diets to produce signs of summer syndrome. Trial 1 examined the effects of dehydration and extended storage of G1-307 fescue compared to alfalfa on dairy steers. Calves fed G1-307 fescue had lower daily feed intake, higher rectal temperatures and respiration rates, and lost 13.4 kg more body weight during the experimental period as compared to those fed alfalfa hay. In trial 2, benomyl (a systemic fungicide) was used to eliminate the fungus Epichloe typhina from treated G1-307 fescue plants. Steers fed the treated G1-307 fescue progeny had higher daily intakes, lower rectal temperature, lower respiration rates, and lost less body weight over the trial period as compared with those fed untreated G1-307 fescue. Kenhy tall fescue seeds with and without analyzable N-acetyl and N-formyl loline alkaloids and a control diet were fed in trial 3. Steers fed the seed with the loline alkaloids had reduced intake, higher rectal temperatures, and lost 10.9 kg more body weight over the trial period than steers fed seed that did not contain loline alkaloids.