Francislene Silveira Sucupira

Efeito de níveis de proteína bruta e de energia metabolizável na dieta sobre o desempenho de codornas de postura

This work was developed to evaluate the effect of different levels of crude protein (CP) and metabolizable energy (ME) on the performance of laying quails. Six hundred and seventy tywo Japanese quails (Coturnix coturnix japonica) from 42 days to 168 days of age were divided in six periods of 28 days each. The birds were assigned to a completely randomized design, with the treatments in a factorial arrangement of 4 x 4 (protein x energy), with six replication of seven birds per experimental unit. The levels evaluated were: 16, 18, 20 and 22% of crude protein and 2,585; 2,685; 2,785 and 2,885 kcal of metabolizable energy/kg of diet. The treatments did not showed significantly effect on the energy intake and egg production. However, the increase in energy level caused a linear reduction in feed intake, protein intake, egg weight and eggs mass; while, the increase in protein level caused a linear increase in daily intake of crude protein, eggs mass, feed conversion and variation in body weight of the birds and a quadratic effect on the egg weight. The estimated level of crude protein in the diet to obtain the maximum egg weight was 21,16%. It was concluded that Japanese quails regulate feed intake according to the energy level of the diet. In order to obtain higher egg production and better feed conversion diets for laying quails the diets should contain 2,585 kcal ME/kg and 18% crude protein. However, if the objective is to obtain heavier eggs, the protein level in the should increase to 21.16%.

Farelo de coco na ração de poedeiras comerciais: digestibilidade dos nutrientes, desempenho e qualidade dos ovos

This experiment was conducted to evaluate the effect of inclusion of coconut meal (CM) in diets on nutrients digestibility, performance and egg characteristics of commercial laying hens. A total of 150 laying hens, with 76 weeks of age was weighed and allotted to a completely randomized design with five treatments and five replicates of six birds in each experimental unit. Five diets were evaluated, one control, without CM and the others with 5, 10, 15, and 20% of CM. Diets were formulated to be isoprotein and isonitrogenous. Amounts of EE, CF and GE increased with inclusion of CM in diets. A quadratic effect was observed for the inclusion levels of CM on digestibility coefficients for DM, N, GE and the values of apparent metabolizable energy (AME) and N corrected apparent metabolizable energy (AMEn) that reached the maximum at 15% of inclusion. Values of AME and AMEn were higher in diets containing 10, 15, and 20% of CM than that for diet without CM. Egg production, egg weight and egg mass were not affected by the inclusion levels of CM. Feed intake decreased and feed conversion improved as CM level increased in diets. Considering the results of dietary digestible energy, it could be recommended that coconut meal inclusion in the laying hen diet should not exceed the level of 15%.

Farelo de amêndoa da castanha de caju na alimentação de codornas japonesas na fase de postura

This experiment was conducted to evaluate the effect of inclusion of cashew nut meal (CNM) in diets on nutrient digestibility, bird performance and egg characteristics of Japanese quails. A total of 270 japanese quails with 17 weeks of age were weighed and distributed into a completely randomized design with six diets and nine replicates of five birds in each experimental unit. Treatments consisted of one diet without CNM (control) and five diets containing 4; 8; 12; 16 and 20% of CNM. There was a linear reduction on digestibility coefficient of DM and nitrogen. But, significant difference in relation to control diet was detected only with diet containing 20% of CNM. Values of fat digestibility, gross energy and metabolizable energy of the diets were not affected by the inclusion levels of CNM. Feed intake was not affected by the inclusion of CNM. However egg production, egg weight, egg mass and feed conversion decreased linearly as dietary CNM levels increased in diets. Percentages of albumen and yolk as well as yolk color, showed a quadratic effect as dietary CNM levels increased. Albumen percentage and yolk color increased and yolk percentage decreased as CNM increased up to the level of 9%. Comparing to control diet only treatment with 20% CNM produced lower egg production, egg weight, egg mass, yolk color and bird feed conversion. In conclusion CNM can be included in Japanese quail diets in levels up to 16%.

Alimentação de codornas de postura com rações contendo levedura de cana-de-açúcar

This experiment was carried out to evaluate the effects of diets containing different levels of sugar cane yeast (Saccharomyces cerevisiae) on production performance of laying quails. Two hundred and forty birds were distributed in a completely randomized design with six treatments (0, 3, 6, 9, 12 e 15% of sugar cane yeast) and eight replications of five quails. Egg production and egg mass were not affected by treatments. Feed intake and egg weight increased linearly as the level of sugar cane yeast increased in diets, while feed conversion decreased. Percentages of egg albumen and egg yolk were not affected by diets. However a quadratic effect was found for shell percentage and egg yolk color. The sugar cane yeast can be included up to 11% in diets for laying quails.

Níveis de proteína bruta e energia metabolizável na ração para codornas de corte

The effect of different CP (20, 22, 24, and 26% of CP) and ME (2,565, 2,715, 2,865, and 3,015 kcal of ME/kg. ) levels on the performance of meat quails was evaluated. Seven hundred and sixty-eight European quails (Coturnix coturnix coturnix) of both sexes from 1 to 42 days of age were assigned to a completely randomized design with 4 x 4 factorial arrangement (protein x energy) and grouped into three clusters with 16 birds each. No significant interaction among protein-energy and protein levels on feed intake, weight gain, feed:gain ratio and viability was observed. However, increasing the dietary energy level resulted in linear reduction of feed intake and greater weight gain and feed:gain ratio. Feed intake of meat quails depends on the dietary energy level. Diet containing 20% CP and 2,865 kcal ME/kg account for better meat quail performance.

Substituição do farelo de soja por levedura de cana-de-açúcar em rações para frangos de corte¹

This research aimed to evaluate the effects of substituting the protein from soybean meal (SM) by yeast sugar cane (YSC) in broiler-chicken diets containing cashew nut meal (CNM). A total of 325 male chicks at one day old, were distributed completely randomly among five feeds with five replications of thirteen birds each. We tested five diets containing 20% CNM each and the levels of 0, 5, 10, 15 and 20% protein replacement of SM by YSC. According to regression analysis, there was a quadratic effect on feed intake and feed conversion by the protein replacement of SM by the YSC, and a linear effect on weight gain in the initial phase (1-21 days). However, substitution at levels up to 20% did not significantly impair performance at any of the different stages, and did not affect the carcass characteristics when compared to the control group. According to the economic study, the protein replacement of SM by YSC proved feasible up to 20%. It can be concluded that, for broiler-chicken diets containing 20% CNM, the SM protein can be replaced up to 20% YSC.

Substituição do farelo de soja pelo farelo de coco em rações contendo farelo da castanha de caju para frangos de corte

The objective of this experiment was to evaluate the effect of substitution level of soybean meal protein by coconut meal protein in rations with cashew nut meal on the performance of broilers. It was used 325 male broiler chicks at one day of age, distributed into complete random designs with five treatments and five repetitions of 13 birds. It was tested the levels of 0, 5, 10, 15 and 20% of substitution of soybean meal protein by coconut meal protein in rations containg 20% of cashew nut meal. The substitution of soybean meal protein by coconut meal protein at levels higher than 5% reduced linearly feed intake, weight gain and feed conversion only at the initial phase. It was also verified a quadratic effect on breast yield, which increased up to the level of 11.5%. In all rearing phases, substitutions up to the level of 20% did not significantly harm performance of birds neither altered carcass traits in relation to the control group. According to the economic study performed, substitution of soybean meal protein by coconut meal protein was economically viable up to the level of 20%. Thus, in rations for broilers with 20% of cashew nut meal, soybean meal protein can be substituted by coconut meal protein at levels up to 20%.