Determination Of True Fecal Caicum Or Phosphorus Digestibility Values Associated With Sunflower Meal And Cottonseed Meal By The Multiple Linear Regression Analysis Technique

We want to validate the possibility of which the multiple linear regression analysis technique (REG) were used to estimate endogenous Ca(calcium), P(phosphorus) outputs and true Ca> P digestibility value with soybean meal (SBM) and sunflower meal (SFM) diets or soybean meal (SBM)and cottonseed meal(CSM) diets as Ca, P source in diets for growing pig. Twelve DLY barrows, with average initial body weight (BW) of 42 kg , were divided to two groups according sex and BW and fed six diets according to a 6 X 6 Latin Square design. The diet 6 were cornstarch- SBM -based with 2.77 g/kgDM Ca, 6.09 g/kgDM P, and five assay diets containing five level of Ca (0.60.1.11,1.67,2.02,2.52 g/kgDM diet) and P( 1.13,2.25,3.32,4.37,5.55 g/kgDM diet) in SFM diet. The diet 6 were cornstarch- SBM -based with 2.82 g/kgDM Ca, 5.99 g/kgDM P, and five assay diets containing five level of Ca (0.47.0.96,1.42,1.86,2.27 g/kgDM diet) and P( 1.23,2.46,3.27,4.78,5.99 g/kgDM diet) in SFM diet .in CSM diet. Chromic oxide(4g/kg of diet,as-fed basis) was included as a digestibility marker. Each experimental period comprised 9d with a 7-d adaptation period and a 2-d collection of fecal samples. Results showed that: There were significant linear relationship (P<0.05) between apparent digestive Ca and dietary inputs of Ca when both expressed as g/kg.DM diet in SFM diets and CSM diets implicated that the REG is valid for estimating both type diets endogenous Ca outputs in pigs ,so as P . In SFM diets true Ca digestibility value of SBM and SFM in growing pigs were 46.9, 30.0% respectively ;true P digestibility value of SBM and SFM in growing pigs were 45.9, 23.2% respectively; the endogenous Ca, P output was .217g/kg, 0.402 g/kg DM intake diets respectively. In CSM diets true Ca digestibility value of SBM and CSM in growing pigs were 45.9, 19.1% respectively ; true P digestibility value of SBM and CSM in growing pigs were 44.9, 28.8% respectively; the endogenous Ca, P output was0.191g/kg, 0.489 g/kg DM intake diets respectively...