-This work aimed to evaluate the performance and egg quality of lightweight laying hens supplemented with a high biological value mineral, carbo-amino-phospho-chelates (CAPC), compared with inorganic minerals (sulfates), at different recommended values. A total of 320 Dekalb White hens, between 53 and 77 weeks of age, were distributed in a completely randomized design into two treatments, 10 replicates of 16 birds each. The treatments consisted of a reference diet formulated according to breed manual recommendations, in which one group was supplemented with a trace mineral source, CAPC (Cu, 8.6; Fe, 43.7; Mn, 56.4; Se, 0.34; and Zn, 43.7 mg/kg) and the other with a sulfate source, using the levels recommended in the breed manual (Cu, 8; Fe, 60; Mn, 70; Se, 0.25; and Zn, 60 mg/kg). There was no effect of trace mineral supplementation on egg production variables, feed conversion ratio by mass or by dozen eggs, and eggs per housed bird. However, there was an increase in feed intake and weight and mass of eggs when birds fed diet supplemented with CAPC. Regarding egg quality, CAPC supplementation increased the albumen weight and percentage, shell weight, thickness, and strength, and Haugh unit. The eggs from birds fed CAPC supplementation showed higher levels of iron and zinc when compared with eggs from birds fed the sulfate source diet. Better quality rates were observed in variables related to shelf life for the group that received CAPC. Trace mineral sources and recommendations in the diets of high genetic potential laying hens need to be reassessed and allow us to conclude that totally replacing the sulfate for different recommendations of CAPC in laying hen diets helps to improve quality characteristics as well as the nutritional value of eggs.

The objective of this study was to evaluate whether replacing corn starch (CS) energy with isolated soy protein (ISP) and soybean oil (SO) and the ambient temperature affect the protein and energy requirements for maintenance and gain of European quail. Thus, a total of 432 European quail from 10 to 30 days of age, distributed in a completely randomized design, were used to estimate the protein and energy requirements for maintenance through the comparative slaughter methodology. The treatments consisted of three diets formulated with the replacement of CS, corresponding to 15% of the metabolizable energy in the diet, with ISP and SO, two controlled temperatures (26 and 35 °C), and three levels of feed supply (ad libitum, and 70 and 40% of ad libitum intake), with four replicates of six birds. Protein and energy requirements for weight gain were determined from 160 European quail, slaughtered every five days at 10, 15, 20, 25, and 30 days of age. Birds were housed in four groups of 40 birds in a room with thermoneutral temperature (26 °C). The energy sources of the feed and temperatures studied affected protein and energy requirements for maintenance and gain of European quail. Replacing CS energy by 15% of dietary energy with SO results in lower protein and energy maintenance requirements for European quail at both temperatures. The protein and energy weight gain requirements of quail fed SO as an energy source is higher than CS and ISP.

O objetivo com esse estudo é avaliar se a substituição da energia do amido de milho pela proteína isolada de soja e óleo de soja e a temperatura ambiente afetam as exigências de cálcio e fósforo para mantença e ganho de codornas europeias. Para estimar as exigências de cálcio e fósforo para mantença, 432 codornas europeias, de 10 a 30 dias de idade, foram distribuídas em delineamento inteiramente ao acaso, em tratamentos que consistiam em três dietas, duas temperaturas e três níveis de oferta de ração. As aves foram alojadas em duas salas com temperaturas controladas (26°C e 35°C), alimentadas com três dietas formuladas com a substituição do amido de milho (AMI), correspondente a 15% da EM da dieta, pela energia da proteína isolada de soja (PIS) e óleo de soja (OS) e três níveis de oferta das rações (ad libitum, 70, 40% do consumo ad libitum), com quatro repetições de 6 aves. As exigências de cálcio e fósforo para ganho foram determinadas com 160 codornas europeias, que foram abatidas a cada 5 dias, isto é, com 10, 15, 20, 25 e 30 dias de idade. As aves foram alojadas em 4 grupos de 40 aves em sala com temperatura termoneutra (26°C). As fontes energéticas da ração e as temperaturas estudadas afetaram as exigências de cálcio e fósforo para mantença e ganho de codornas europeias com 10 a 30 dias de idade.