{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,22]],"date-time":"2026-06-22T22:45:30Z","timestamp":1782168330629,"version":"3.54.5"},"reference-count":33,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2020,3,5]],"date-time":"2020-03-05T00:00:00Z","timestamp":1583366400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Animal Physiology Nutrition"],"published-print":{"date-parts":[[2020,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>This study was conducted to investigate the effects of dietary amylose\/amylopectin (AM\/AP) ratio and amylase on growth performance, apparent digestibility of energy and starch, serum biochemical index, and digestive enzymes. The experiment used a 4\u00a0\u00d7\u00a03 factor design, and 960 one\u2010day\u2010old Arbor Acres (AA) broilers were randomly divided into 12 groups fed diets containing different AM\/AP ratio of 0.11, 0.23, 0.35 and 0.47 and combined with 0, 3,000 and 6,000\u00a0U\/kg amylase. Results showed that 0.23\u20130.35 AM\/AP ratio increased growth performance, while dietary addition of 6,000\u00a0U\/kg amylase significantly reduced average daily weight gain in broilers. The energy digestibility was significantly reduced along with the increase of dietary AM\/AP ratio and in the 6,000\u00a0U\/Kg amylase\u2010supplemented groups. The digestibility of starch also decreased significantly with the increase of dietary AM\/AP ratio, but high dose (6,000\u00a0U\/Kg) of amylase increased. High AM\/AP diet reduced serum insulin concentration, which was increased in amylase\u2010supplemented groups. Furthermore, exogenous amylase increased amylase activity in the jejunal chyme. In conclusion, dietary 0.23\u20130.35 AM\/AP ratio was suggested to maintain a higher growth performance in broilers and high AM\/AP ratio diets reduced energy and starch digestibility and serum insulin concentration, which was reversed by dietary amylase.<\/jats:p>","DOI":"10.1111\/jpn.13338","type":"journal-article","created":{"date-parts":[[2020,3,6]],"date-time":"2020-03-06T05:53:30Z","timestamp":1583474010000},"page":"928-935","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":23,"title":["Effects of dietary amylose\/amylopectin ratio and amylase on growth performance, energy and starch digestibility, and digestive enzymes in broilers"],"prefix":"10.1111","volume":"104","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7549-3629","authenticated-orcid":false,"given":"Jie","family":"Ma","sequence":"first","affiliation":[{"name":"College of Animal Science and Technology Hunan Agriculture University Changsha 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