Table 2.

Choline addition and dosage in diet¹⁾,²⁾

Item (g/kg diet)	Phase 1		Phase 2		Phase 3		Phase 4
	Con	HC	Con	HC	Con	HC	Con	HC
50% Choline chloride addition	0	3.60	0	3.23	0	3.12	0	3.03
Calculated level
Choline addition	0	1.34	0	1.20	0	1.16	0	1.13
Total choline3)	1.34	2.68	1.20	2.40	1.16	2.32	1.13	2.26
Analyzed level
Choline	1.59	2.98	1.33	2.77	1.40	2.71	1.40	2.75
Choline chloride	0.08	1.73	0.24	1.56	0.25	1.50	0.25	1.45

¹⁾Phase 1, 2, 3, and 4 diets were fed from 21 to 38, 38 to 73, 73 to 120, and 120 to 200 d of age, respectively.

²⁾Con, basal diet; HC, diet supplemented with two times more choline than the basal diet.

³⁾The total choline content was calculated according to Feed Composition and Nutritive Values in China (22nd rev).