Uso da alga Lithothamnium calcareum como fonte alternativa de cálcio nas rações de frangos de corte

Abstract

RESUMOObjetivou-se, com este trabalho, avaliar o uso da alga Lithothamnium calcareum (Pallas) Areschoug nas rações para frangos de corte de 1 a 21 e 21 a 42 dias de idade, em substituição à fonte de cálcio tradicional (calcário calcítico). Para isso, foram utilizados 300 pintos machos, da linhagem Cobb ® , que receberam rações contendo o calcário calcítico e a alga Lithothamnium calcareum (colhida de inteira e na forma de areia biodentrítica) como fontes de cálcio. O delineamento experimental utilizado foi o inteiramente casualizado, com três tratamentos e cinco repetições de 20 aves cada. As variáveis analisadas foram: ganho de peso (g/ave), consumo de ração (g/ave) e conversão alimentar (g/g). No final do experimento foram avaliados os parâmetros ósseos: peso da tíbia (g), comprimento da tíbia (mm), diâmetro da tíbia (mm) e teor de cinzas na tíbia (%). Na fase inicial (1 a 21 dias) houve efeito (P<0,05) entre os tratamentos para o ganho de peso e conversão alimentar, sendo que o tratamento controle apresentou melhores resultados. Para a fase de crescimento (21 a 42 dias) e período total (1 a 42 dias) não houve efeito entre os tratamentos estudados. A utilização da alga Lithothamnium calcareum (independente da forma de colheita) em substituição à fonte de cálcio tradicional (calcário calcítico) pode ser recomendada para as rações de frangos de corte, sem prejudicar o desempenho zootécnico. Porém, deve-se levar em consideração a viabilidade econômica do uso dessa fonte alternativa nas rações. Termos para indexação: Algas calcárias, calcário, tíbia, Lithothamnium calcareum. ABSTRACTThe objective of this study was to evaluate the use of the algae Lithothamnium calcareum (Pallas) Areschoug in diets for broiler chickens from 1 to 21 and 21 to 42 days, to replace the traditional source of calcium (limestone). 300 male chicks from Cobb® strain, which received diets containing limestone and Lithothamnium calcareum algae (as a whole and as sand biodentritic) were used as sources of calcium. The experimental design was completely randomized, with three treatments and five replicates of 20 birds each. The variables analyzed were: weight gain (g / bird), feed intake (g / bird), feed per again (g / g). At the end of the experiment the bone parameters: weight of the tibia (g), tibia length (mm), diameter of the tibia (mm) and ash content in the tibia (%). Were evaluated in the initial phase (1 to 21 days) there was an effect (P <0.05) between treatments for weight gain and feed per again, and the control treatment showed better results. For the growing phase (21 to 42 days) and total period (1 to 42 days) there was no effect among the treatments studied. The use of the algae Lithothamnium calcareum (independently of the harvest) to replace the traditional source of calcium (limestone) can be recommended for diets of broilers without affecting the growth performance. However, one should take into consideration the economic feasibility of using this alternative source in the diets.

Digestibility and bioavailability of organic calcium sources for European quail

“…Bone ash contents did not differ significantly (P>0.05) between the different tested calcium sources. This finding is in line with those reported by Carlos et al (2011), who did not observe changes in the production performance or bone ash content of birds fed diets containing calcareous algae as the calcium source. Oso et al (2011) also did not observe differences in bone ashes between chickens fed oyster shell, snail shell and limestone.…”

“…There were no differences (P>0.05) in feed intake between the birds that consumed diets containing calcium carbonate, charru mussel-, maçunim-and oyster-shell meals as the calcium source. These results are in line with those obtained by Carlos et al (2011), who also did not find significant differences in the feed intake of broiler hens from one to 21 days of age which were fed diets containing calcareous algae as a substitute for calcitic limestone. Studies led by Lana (2017) revealed that broiler hens fed diets containing 0.421% calcium from charru mussel shell meal had a higher feed intake than the other groups, which were fed different organic calcium sources.…”

Performance, carcass quality and intestinal biometry of feed European quails with seaweed meal (Sargassum sp)

“…in chicken diets significantly reduced cholesterol levels in eggs, without affecting their physical quality and favorably increases yolk color, possibly attributed to the presence of lutein, zeaxanthin, fucoxanthin, and carotenoids present in brown algae. Improved effects on feed conversion were observed by Carlos et al (2011), in broilers supplemented with Lithothamnium calcareum, which showed greater weight gain Different letters on the line differ from each other by Tukey's test; SEM = standard error of the mean; 1 Y = 3.79 + 0.59x -0.07x 2 (R 2 = 0.66).…”

“…Algae also have pigmenting properties for the eggs, skin, and muscles of birds, increasing their acceptance by the consumer market (Carrillo et al, 2012), they have a large amount of calcium, therefore, ideal for use in the feed of meat quails, which have a high growth rate and the deficiency in this mineral can cause problems in bone formation, especially tibial dysplasia (Lana et al, 2020), which can affect the growth and performance of birds. (Fernandes et al, 2020;Hajati et al, 2020;Jha & Mishra, 2021), with positive results in posture, improving animal performance and feed and water consumption (Carlos et al, 2011).…”

Performance, carcass quality, and intestinal biometry of European quail fed on kelp meal (Sargassum sp)

“…Seaweed species such as Sargassum spp, Gracilaria sp, and Spirulina platensis present a good source of minerals, carbohydrates, and essential amino acids, such as arginine, tryptophan, and phenylalanine, being rich in beta-carotene and vitamins (Marín et al, 2009;Abouelezz, 2017;Ekýzoðlu et al, 2020;Hajati et al, 2020; ) and these algae and others of the same genus, when used in bird feeding, promote growth and increase in intestinal ora (Fernandes et al, 2020;Hajati & Zaghari, 2020;Rajesh & Pravin, 2021), with positive results in posture, improving animal performance and feed and water consumption (Melo et al, 2008aand 2008b, Carlos et al, 2011.…”