Twinning Beef Cows
نویسنده
چکیده
gestibility or protein quality of SBM, the urease assay is good for detecting underprocessing and the KOH protein solubility assay is good for detecting overprocessing. A combination of the latter two assays is needed to ensure that SBM has neither been underheated nor overheated. The protein dispersibility index (PDI) assay may be superior to the urease and KOH assays as an indicator of minimum adequate heat processing of SBM. Determining the Lys concentration as a percentage of the CP may be a good initial indicator of possible overprocessing. Recent work indicates that near infrared reflectance spectroscopy (NIRS) and a new immobilized digestive enzyme assay (IDEA) may also be useful assays for predicting in vivo AA digestibility of SBM.
منابع مشابه
Effects of sex control and twinning on economic optimization of culling cows in Japanese Black cow-calf production systems.
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An evaluation of natuml twinning in beef cattle revealed that cows birthing twins had shorter (P c .Ol) gestation lengths, more (P e .Ol) retained placentas, more (P < .01) dystocia, more (P e .01) days to e m s , lower (P e .01) conception rates and more (P < .01) days to pregnancy than cows birthing singles. Days to estrus, conception rate and days to pregnancy were not affected by number of ...
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