Table 1.
Composition and nutrient levels of experimental diets (air-dry basis).
| Ingredients | Content, % | Nutrient levelsb | Content |
|---|---|---|---|
| Corn | 56.00 | Digestive energy, kcal/kg | 3190.98 |
| Soybean meal (46%) | 18.14 | Crude protein, % | 15.47 |
| Rice bran meal | 8.40 | Crude fiber, % | 3.99 |
| Brown | 6.00 | Crude fat, % | 2.73 |
| Paddy | 8.00 | Dry matter, % | 85.15 |
| Limestone | 1.00 | Ca, % | 0.54 |
| CaHPO4 | 0.30 | TP, % | 0.54 |
| NaCl | 0.40 | Available phosphorus, % | 0.17 |
| Choline chloride | 0.10 | SID Lys, % | 1.23 |
| L-Lysine hydrochloride | 0.50 | SIDMet + Cys, % | 0.55 |
| DL-Methionine | 0.01 | SID Thr, % | 0.55 |
| Threonine | 0.05 | SID Met, % | 0.27 |
| Premixa | 1.10 | SID Lys, % | 1.23 |
| Total | 100 |
aThe premix provided the following per kg of diets: VA 12400 IU, VD3 2,800 IU, VE 30 IU, VK 5 mg, VB12 40 μg, VB1 3 mg, VB2 10 mg, nicotinic acid 40 mg, D-pantothenic acid 15 mg, folic acid 1 mg, VB6 8 mg, biotin 0.08 mg, CaI2O6 0.92 mg, Na2SeO3 0.77 mg. bNutrient levels were determined, except that digestible energy, SID Lys, SID Met, SID Thr, and SID Trp were calculated. The crude protein, crude fiber, crude fat, neutral detergent fiber, acid detergent fiber, moisture, ash, Ca, and TP were all determined according to the China National Standard, and the document numbers are GB/T 6432–2018, GB/T 6434–2006, GB/T 6433–2006, GB/T 20806–2006, NY/T 1459–2007, GB/T 6435–2014, GB/T 6438–2007, GB/T6436-2002, and GB/T 6437–2018, respectively.