生长猪日粮中玉米、豆粕和油菜籽粕磷消化率的价值可加性。
Additivity of values for phosphorus digestibility in corn, soybean meal, and canola meal in diets fed to growing pigs.
作者信息
She Yue, Wang Qiuyun, Stein Hans H, Liu Ling, Li Defa, Zhang Shuai
机构信息
Ministry of Agriculture Feed Industry Centre, State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing 100193, China.
Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
出版信息
Asian-Australas J Anim Sci. 2018 Aug;31(8):1301-1307. doi: 10.5713/ajas.17.0547. Epub 2018 Jan 26.
OBJECTIVE
This study was conducted to determine the apparent and standardized total tract digestibility (ATTD and STTD) of phosphorus (P) in corn, soybean meal (SBM), and canola meal (CM), and additivity of values for ATTD and STTD of P in corn, SBM, and CM in diets fed to growing pigs.
METHODS
Thirty-six growing barrows (initial body weight of 21.6±1.7 kg) were placed in metabolism crates and allotted to a completely randomized design with 6 diets and 6 pigs per diet. Six diets were formulated using corn, SBM or CM as the sole source of P, or corn and SBM, or corn and CM, or corn, SBM, and CM as the P source in each diet, respectively. Fecal samples were collected for 5 d following a 7 d adaptation period to the diets.
RESULTS
Values for ATTD and STTD of P in corn, SBM, and CM in growing pigs were 33.12% and 37.76%, 50.19% and 56.62%, 34.93% and 39.45%, respectively. The ATTD and STTD of P in SBM were greater (p<0.05) than those in corn and CM. However, there were no differences in the ATTD or STTD of P between corn and CM. The determined STTD of P in the mixture of corn and SBM, corn and CM, and corn, SBM, and CM is not different from the calculated STTD values.
CONCLUSION
Values for STTD of P in corn, SBM, and CM are additive in their mixture fed to growing pigs.
目的
本研究旨在测定玉米、豆粕和菜粕中磷的表观全肠道消化率（ATTD）和标准全肠道消化率（STTD），以及生长猪日粮中玉米、豆粕和菜粕磷的ATTD和STTD值的加和性。
方法
36头生长公猪（初始体重21.6±1.7 kg）被安置在代谢笼中，采用完全随机设计，6种日粮，每种日粮6头猪。6种日粮分别以玉米、豆粕或菜粕作为唯一磷源，或以玉米和豆粕、玉米和菜粕、玉米、豆粕和菜粕作为每种日粮的磷源进行配制。在对日粮适应7 d后，收集5 d的粪便样本。
结果
生长猪玉米、豆粕和菜粕中磷的ATTD值和STTD值分别为33.12%和37.76%、50.19%和56.62%、34.93%和39.45%。豆粕中磷的ATTD和STTD高于玉米和菜粕（p<0.05）。然而，玉米和菜粕之间磷的ATTD或STTD没有差异。玉米和豆粕、玉米和菜粕、玉米、豆粕和菜粕混合物中测定的磷STTD值与计算值无差异。
结论
生长猪日粮中玉米、豆粕和菜粕混合后磷的STTD值具有加和性。
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