The effects of dietary hot pepper Capsicum annuum waste powder supplementation on egg production traits of Japanese quail layers

ABSTRACT: This study was conducted to evaluate the effects of different levels of dietary hot pepper (Capsicum annuum L.) waste supplementation on egg production performance and quality in Japanese quail hens (Coturnix coturnix japonica). A total of 192, seven-week-old Japanese quail layers were divided into 4 treatment groups of similar mean weight (304±0.5 g), each comprising 12 subgroups (including 1 male and 3 females). Treatment birds were fed on experimental basal layer diet supplemented with 1, 2 or 4 g hot pepper waste powder (HPWP) per kg diet. The laying performance was determined by recording feed intake, egg weight, daily egg production, and biweekly egg quality. Results showed that HPWP supplementation to layer diet did not have any significant (P>0.05) effects on body weight and feed conversion ratio, while it had significant effects on feed intake (P<0.01), and laying egg weight, average egg weight, total egg yield (P<0.05). A 2 g HPWP supplementation resulted in the highest total egg yield (P<0.05) with quadratic effects on egg shape index (P<0.05) and albumen pH (P<0.01). According to the values in the study, the egg shape index of 2 g HPWP group was circular and; therefore, attractive to consumers. We highly recommend the non-economic value of 2 g/kg supplementation of hot pepper waste powder, especially for egg production. To conclude, HPWP can be used for quail layer diets due to its beneficial effects on egg quality since it is an economic and easy agricultural by-product obtained from red pepper paste industry waste.

摘要：本研究旨在评估日粮中添加不同水平的辣椒（*Capsicum annuum L.*）废弃物对日本鹌鹑（*Coturnix coturnix japonica*）产蛋性能与蛋品质的影响。共计192只7周龄的日本鹌鹑产蛋禽，按平均体重（304±0.5 g）均分为4个处理组，每组下设12个亚组（每亚组包含1只公鹌鹑与3只母鹌鹑）。试验组鹌鹑饲喂基础产蛋日粮，分别添加1、2或4 g/kg日粮的辣椒废弃物粉末（Hot Pepper Waste Powder, HPWP）。通过记录采食量、蛋重、日产蛋量以及每两周一次的蛋品质指标来评估产蛋性能。结果显示，日粮中添加HPWP对鹌鹑的体重与饲料转化率无显著影响（P>0.05），但对采食量（P<0.01）、产蛋重、平均蛋重以及总产蛋量均有显著影响（P<0.05）。添加2 g/kg HPWP可获得最高的总产蛋量（P<0.05），且对蛋形指数（Egg Shape Index）具有二次效应（P<0.05），对蛋白pH（Albumen pH）亦具有极显著的二次效应（P<0.01）。本研究数据显示，2 g/kg HPWP组的蛋形指数呈圆形，因此更受消费者青睐。我们强烈推荐在鹌鹑产蛋日粮中使用2 g/kg的HPWP添加方案，其具备良好的非经济效益，尤其对产蛋生产而言益处显著。综上，HPWP可应用于鹌鹑产蛋日粮中，因其对蛋品质具有积极作用，且其作为红辣椒酱加工产业产生的农业副产物，兼具经济实惠与易于获取的优势。