نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه تغذیه دام وطیور، دانشکده علوم دامی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران
2 گروه تغذیه دام طیور، دانشکده علوم دامی، دانشگاه علوم کشاورزی منابع طبیعی گرگان، گرگان، ایران
3 گروه تغذیه دام طیور، گروه تغذیه دام و طیور، دانشکده علوم دامی، دانشگاه علوم کشاورزی منابع طبیعی گرگان، گرگان، ایران
4 گروه علوم دامی، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The study was conducted to investigate the effect of processed cottonseed feeding on pH, protozoa, volatile fatty acids in rumen fluid, carboxymethyl cellulase and microcrystalline cellulase enzyme activity, urinary purine derivatives. For this purpose 40 Afshari male lambs, with an average weight of 27.6±4 kg, were assigned randomly to four treatments with ten replications for 84 days. Experimental treatments included: 1) diet containing whole cottonseed, 2) diet containing ground cottonseed, 3) diet containing micronized cottonseed and 4) diet containing cottonseed washed with sodium hydroxide. Sampling of rumen fluid was done in the last week of the experimental period. In order to estimate microbial protein, urine was collected for 5 days. The results of the experiment showed that cotton seed processing had no significant effect on protozoan activity. However, cotton seed processing had a significant difference on rumen pH and ammonia nitrogen. No significant difference was observed in the activity of the extracellular part of carboxymethylcellulose between the treatments. There was no significant difference in the activity of microcrystalline cellulase and carboxymethyl cellulase in all sections between the control treatment and other treatments. With cottonseed processing, there was no significant difference in the amount of absorbed, excreted and absorbed purine derivatives, microbial protein production in the rumen and microbial nitrogen produced among different treatments. These findings show that micronized cottonseed processing or addition of sodium hydroxide increases daily growth, rumen propionic acid, total volatile fatty acids and ammonia reduction and can be Suggested in the diet of fattening lambs.
کلیدواژه‌ها [English]
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