Effect of Corn Grinding Methods and Particle Size on the Nutrient Digestibility of Chahua Chickens
This study investigates the effect of grinding methods, including roller mill, hammer mill, and two-stage grinding, on the particle size distribution of corn and the effect of corn particle size on the nutrient digestibility of native chickens in Southwest China. The roller mill, hammer mill, and a...
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MDPI AG
2023-07-01
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| Series: | Animals |
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| Online Access: | https://www.mdpi.com/2076-2615/13/14/2364 |
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| author | Guoyi Niu Tingrui Zhang Shengxiong Cao Xi Zhang Linli Tao |
| author_facet | Guoyi Niu Tingrui Zhang Shengxiong Cao Xi Zhang Linli Tao |
| author_sort | Guoyi Niu |
| collection | DOAJ |
| description | This study investigates the effect of grinding methods, including roller mill, hammer mill, and two-stage grinding, on the particle size distribution of corn and the effect of corn particle size on the nutrient digestibility of native chickens in Southwest China. The roller mill, hammer mill, and a combination of the hammer mill and roller mill were used to obtain corn with various coarseness. Corn with different coarseness obtained using a combination of the hammer mill and roller mill was fed to Chahua chicken No. 2-type chickens (CHC2s). A total of 192 CHC2s in weeks 12 and 19 were randomly allocated to eight groups in triplicate. The results show that the geometric mean diameter (d<sub>gw</sub>) and the geometric standard deviation (S<sub>gw</sub>) were significantly (<i>p</i> < 0.05) affected by the grinding methods. The S<sub>gw</sub> obtained when using a sieve of 2.0 mm in a hammer mill was lower (<i>p</i> < 0.05) than that obtained using a 4.5 mm sieve. Combining the roller mill and hammer mill increased the uniformity of the particle size when grinding coarse particles. For fine particles, the d<sub>gw</sub> and S<sub>gw</sub> obtained when using the hammer mill were significantly lower (<i>p</i> < 0.05) than those obtained when using the roller mill and two-stage grinding method. Reducing the particle size of the corn (<900 µm) significantly increased the dry matter, crude protein, amino acid digestibility, and apparent metabolizable energy in the chicken in weeks 12 and 19. Fine particles significantly increased the crude protein digestibility of the CHC2s at week 12, while there was no significant effect on the crude protein and amino acid digestibility in the CHC2s at week 19. In conclusion, different grinding methods can affect the particle size distribution. For a coarse particle size, combining the roller mill and hammer mill tends to produce a more uniform particle size. Finely ground corn (between 700 µm and 900 µm) improved the dry matter (DM), apparent metabolizable energy (AME), and crude protein (CP) digestibility of the CHC2s at week 12. An increased particle size did not impact the CP and amino acid (AA) digestibility of the CHC2s at week 19. |
| first_indexed | 2024-03-11T01:23:03Z |
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| id | doaj.art-ee847658e5f14e609527f36463e907ba |
| institution | Directory Open Access Journal |
| issn | 2076-2615 |
| language | English |
| last_indexed | 2024-03-11T01:23:03Z |
| publishDate | 2023-07-01 |
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| spelling | doaj.art-ee847658e5f14e609527f36463e907ba2023-11-18T18:01:23ZengMDPI AGAnimals2076-26152023-07-011314236410.3390/ani13142364Effect of Corn Grinding Methods and Particle Size on the Nutrient Digestibility of Chahua ChickensGuoyi Niu0Tingrui Zhang1Shengxiong Cao2Xi Zhang3Linli Tao4Yunnan Provincial Laboratory of Animal Nutrition and Feed Science, Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming 650201, ChinaCollege of Veterinary Medicine, Yunnan Agricultural University, Kunming 650201, ChinaYun Zhong Mei Agriculture Technology Co., Ltd., Kunming 651701, ChinaYunnan Provincial Laboratory of Animal Nutrition and Feed Science, Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming 650201, ChinaYunnan Provincial Laboratory of Animal Nutrition and Feed Science, Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming 650201, ChinaThis study investigates the effect of grinding methods, including roller mill, hammer mill, and two-stage grinding, on the particle size distribution of corn and the effect of corn particle size on the nutrient digestibility of native chickens in Southwest China. The roller mill, hammer mill, and a combination of the hammer mill and roller mill were used to obtain corn with various coarseness. Corn with different coarseness obtained using a combination of the hammer mill and roller mill was fed to Chahua chicken No. 2-type chickens (CHC2s). A total of 192 CHC2s in weeks 12 and 19 were randomly allocated to eight groups in triplicate. The results show that the geometric mean diameter (d<sub>gw</sub>) and the geometric standard deviation (S<sub>gw</sub>) were significantly (<i>p</i> < 0.05) affected by the grinding methods. The S<sub>gw</sub> obtained when using a sieve of 2.0 mm in a hammer mill was lower (<i>p</i> < 0.05) than that obtained using a 4.5 mm sieve. Combining the roller mill and hammer mill increased the uniformity of the particle size when grinding coarse particles. For fine particles, the d<sub>gw</sub> and S<sub>gw</sub> obtained when using the hammer mill were significantly lower (<i>p</i> < 0.05) than those obtained when using the roller mill and two-stage grinding method. Reducing the particle size of the corn (<900 µm) significantly increased the dry matter, crude protein, amino acid digestibility, and apparent metabolizable energy in the chicken in weeks 12 and 19. Fine particles significantly increased the crude protein digestibility of the CHC2s at week 12, while there was no significant effect on the crude protein and amino acid digestibility in the CHC2s at week 19. In conclusion, different grinding methods can affect the particle size distribution. For a coarse particle size, combining the roller mill and hammer mill tends to produce a more uniform particle size. Finely ground corn (between 700 µm and 900 µm) improved the dry matter (DM), apparent metabolizable energy (AME), and crude protein (CP) digestibility of the CHC2s at week 12. An increased particle size did not impact the CP and amino acid (AA) digestibility of the CHC2s at week 19.https://www.mdpi.com/2076-2615/13/14/2364corngrinding methodsparticle sizeChahua chickensnutrient digestibility |
| spellingShingle | Guoyi Niu Tingrui Zhang Shengxiong Cao Xi Zhang Linli Tao Effect of Corn Grinding Methods and Particle Size on the Nutrient Digestibility of Chahua Chickens Animals corn grinding methods particle size Chahua chickens nutrient digestibility |
| title | Effect of Corn Grinding Methods and Particle Size on the Nutrient Digestibility of Chahua Chickens |
| title_full | Effect of Corn Grinding Methods and Particle Size on the Nutrient Digestibility of Chahua Chickens |
| title_fullStr | Effect of Corn Grinding Methods and Particle Size on the Nutrient Digestibility of Chahua Chickens |
| title_full_unstemmed | Effect of Corn Grinding Methods and Particle Size on the Nutrient Digestibility of Chahua Chickens |
| title_short | Effect of Corn Grinding Methods and Particle Size on the Nutrient Digestibility of Chahua Chickens |
| title_sort | effect of corn grinding methods and particle size on the nutrient digestibility of chahua chickens |
| topic | corn grinding methods particle size Chahua chickens nutrient digestibility |
| url | https://www.mdpi.com/2076-2615/13/14/2364 |
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