Determination of the energy contents and nutrient digestibility of corn, waxy corn and steam-flaked corn fed to growing pigs

• Published in: Animal bioscience Vol. 32; no. 10; pp. 1573 - 1579
• Main Authors: Ma, Dongli, Li, Juntao, Huang, Chengfei, Yang, Fengjuan, Wu, Yi, Liu, Ling, Jiang, Wei, Jia, Zhicheng, Zhang, Peijun, Liu, Xuezhen, Zhang, Shuai
• Format: Journal Article
• Language: English
• Published: Korea (South) Asian - Australasian Association of Animal Production Societies 01.10.2019; Asian-Australasian Association of Animal Production Societies (AAAP) and Korean Society of Animal Science and Technology (KSAST); Asian-Australasian Association of Animal Production Societies; 아세아·태평양축산학회
• Subjects: Available Energy; Beef cattle; Body weight; Book publishing; Corn; Dietary fiber; Growing Pig; Nutrient Digestibility; Steam-flaked Corn; Swine; Waxy Corn; 축산학; United States; China; Steam-flaked Corn; Waxy Corn; Growing pig; Available Energy; Nutrient Digestibility
• ISSN: 1011-2367; 2765-0189; 1976-5517; 2765-0235
• DOI: 10.5713/ajas.18.0713

The research was conducted to determine the DE and ME contents as well as the apparent total tract digestibility (ATTD) of nutrients in corn, waxy corn and steam-flaked corn fed to growing pigs. Eighteen growing pigs with initial body weight of 15.42 ± 1.41 kg were randomly allotted to three diets including a corn diet, a waxy corn diet and a steam-flaked corn diet in a completely randomized design. Each treatment contained six replicates. The experiment lasted for 12 days, which comprised 7-d adaptation to diets followed by a 5-d total collection of feces and urine. The energy contents and the nutrient digestibility in three ingredients were calculated using direct method. Compared to normal corn, both the amylose and dietary fiber contents in waxy corn were numerically lower, but the starch gelatinization degree was numerically greater. Moreover, the DE and ME contents as well as the ATTD of NDF and ADF in waxy corn were significantly greater (p < 0.05) than those in normal corn when fed to growing pigs. Furthermore, the steam-flaked corn had greater (p < 0.05) DE and ME contents, and ATTD of ether extract (EE) and ADF compared to normal corn. Both variety and processing procedure have influence on chemical compositions, energy contents and nutrient digestibility of corn. The waxy corn and steam-flaked corn had greater starch gelatinization degree and DE and ME contents compared to normal corn when fed to growing pigs.