Acid insoluble ash (AIA), a kind of endogenous indicator was measured to estimate the apparent digestibility of DM, CP and TAA in feces. The following is the relevant formula: 1-bc/ad. where a denotes the content of DM, CP or AA in diets (%); b denotes the content of DM, CP or AA in feces (%); c denotes the content of AIA in diet (%); d denotes the content of AIA in feces (%). AA compositions (%) appertained the content of single AA in TAA.
All results were expressed as mean ± standard error of mean (SEM). All data were subjected to a one-way analysis of variance using the general linear model (GLM) procedure of SAS 8.2 statistical software (SAS Institute, Inc. Cary, NC, USA) [16 (link)] according to a completely randomized one-factorial design. Differences among experimental groups were identified via the Student–Newman–Keuls (SNK) test. A difference was considered to be statistically significant when p < 0.05.
All results were expressed as mean ± standard error of mean (SEM). All data were subjected to a one-way analysis of variance using the general linear model (GLM) procedure of SAS 8.2 statistical software (SAS Institute, Inc. Cary, NC, USA) [16 (link)] according to a completely randomized one-factorial design. Differences among experimental groups were identified via the Student–Newman–Keuls (SNK) test. A difference was considered to be statistically significant when p < 0.05.