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Replacement of corn by rice grits, with or without phytase supplementation, in diets for silver catfish (Rhamdia quelen) juveniles
Aquaculture Nutrition ( IF 3.5 ) Pub Date : 2020-09-01 , DOI: 10.1111/anu.13104
Victor Vicentin Bentes 1 , Fábio Bittencourt 2 , Dacley Hertes Neu 1 , Altevir Signor 2 , Cinthia Eyng 3
Affiliation  

The replacement of corn by rice grits, at different levels (with or without phytase supplementation), in diets for silver catfish (Rhamdia quelen) juveniles was evaluated. We distributed 360 juveniles in a completely randomized 2 × 5 factorial design (with or without phytase supplementation and rice grit replacement levels of 0, 25, 50, 75 and 100 g/kg), with three repetitions. Each experimental unit was composed of 12 fish (approximately three months of age and an initial length of 17.60 ± 1.29 cm). At the end of the experiment (50 days), the productive performance (weight gain, feed conversion ratio, survival, specific length, condition factor and specific growth rate), body composition (moisture, ash, lipid and protein), muscle growth and morphometry of the intestinal folds were analysed. There was no interaction (p > .05) between the levels of rice grits and the supplementation or not of phytase for all parameters evaluated. However, regardless of phytase supplementation or not, a linear reduction (p < .05) in the height of intestinal folds was observed as the level of rice grits increased. We can conclude that the replacement of up to 100 g/kg of corn by rice grits can be used in diets for R. quelen regardless of enzyme supplementation.

中文翻译:

cat鱼(Rhamdia quelen)幼鱼日粮中添加或不添加植酸酶的玉米粒替代玉米

cat鱼日粮中不同水平(添加或不添加植酸酶)的米粉替代玉米(Rhamdia quelen))对青少年进行了评估。我们以完全随机的2×5因子设计(有或没有植酸酶补充剂和大米替代量分别为0、25、50、75和100 g / kg)分发了360个少年,并重复了3次。每个实验单元由12条鱼组成(大约三个月大,初始长度为17.60±1.29 cm)。实验结束(50天)时,生产性能(增重,饲料转化率,存活率,特定长度,条件因子和特定生长率),身体成分(水分,灰分,脂质和蛋白质),肌肉生长和分析了肠道褶皱的形态。没有互动(p > 0.05)之间的米粉水平和植酸酶的补充或不评估所有参数。然而,无论是否添加植酸酶, 随着米粉水平的增加,肠道皱褶的高度都呈线性下降(p <.05)。我们可以得出结论,无论补充何种酶,均可以用大米粗粉替代高达100克/千克的玉米,这可用于克伦氏菌的日粮。
更新日期:2020-09-20
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