CAJ | 학술논문

本研究旨在采用多重线性回归法测定生长猪内源磷排泄量及高粱和豆粕中磷的真消化率.试验选用6头健康大白×长白阉公猪为消化试验动物,平均体重为(23.6±1.23) kg.采用6×6拉丁方设计,设6个磷水平(0.08%、0.15%、0.23%、0.30%、0.38%、0.53%),以豆粕、葡萄糖、玉米淀粉等为基础,以高粱和豆粕为磷唯一来源,配制半纯合试验饲粮.饲粮中添加0.35%Cr2O3作为外源指示剂.试验分6个试验期,每期8 d,其中6 d适应期,2 d收粪期.饲粮中磷表观消化率受饲粮中磷水平的影响(P＜0.05),并随饲粮中磷水平的提高由14.88%增大至34.88%.在以g/kg DMI为计量单位条件下,生长猪粪磷的排出量与饲粮磷的摄入量呈线性关系(P=0.000 1).结果表明,多重线性回归法可用于生长猪内源磷排泄量和植物性饲料磷真消化率的测定;以豆粕-高粱型模型饲粮测定出生长猪内源磷排泄量为0.294 0 g/kg DMI,高粱中磷的真消化率为56.05%,豆粕中磷的真消化率为39.41%.
본연구지재채용다중선성회귀법측정생장저내원린배설량급고량화두박중린적진소화솔.시험선용6두건강대백×장백엄공저위소화시험동물,평균체중위(23.6±1.23) kg.채용6×6랍정방설계,설6개린수평(0.08%、0.15%、0.23%、0.30%、0.38%、0.53%),이두박、포도당、옥미정분등위기출,이고량화두박위린유일래원,배제반순합시험사량.사량중첨가0.35%Cr2O3작위외원지시제.시험분6개시험기,매기8 d,기중6 d괄응기,2 d수분기.사량중린표관소화솔수사량중린수평적영향(P＜0.05),병수사량중린수평적제고유14.88%증대지34.88%.재이g/kg DMI위계량단위조건하,생장저분린적배출량여사량린적섭입량정선성관계(P=0.000 1).결과표명,다중선성회귀법가용우생장저내원린배설량화식물성사료린진소화솔적측정;이두박-고량형모형사량측정출생장저내원린배설량위0.294 0 g/kg DMI,고량중린적진소화솔위56.05%,두박중린적진소화솔위39.41%.
In the study,regression analysis technique was used to measure the fecal phosphorus (P) endogenous outputs and true P digestibility values with sorghum and soybean meal in growing pigs. Six healthy Yorkshire × Landrace barrows, with average initial body weight of (23.6 ± 1.23) kg,were fed six diets according to a 6 × 6 Latin square design. The diets were soybean meal-corn starch-glucose type with six dietary levels of P (0.08%, 0.15%, 0.23 %, 0.30 %, 0.38 %, 0. 53%) from sorghum and soybean meal. Diet P was only provided by sorghum and soybean meal. Chromic oxide (3.5 g/kg of diet,as-fed basis) was included in the diets as digestibility marker. Each experimental period consisted of 8 days with 6-day adaptation and 2-day collection of representative fecal samples. The results showed that the apparent fecal P digestibility values in diets were affected (P＜0.05) by P levels in the assay diets. Linear relationship (P = 0.000 1) ,expressed as g/kg DM diet intake,was existed between fecal outputs and dietary inputs of P. In conclusion, the results suggested that the endogenous P outputs can be determined by multiple linear regression analysis technique. The P endogenous outputs for pig were 0. 294 0 g/kg DMI,true digestibility value of P in sorghum was 56.05% ,and true digestibility value of P in soybean was 39.41%.