Substituição de minerais inorgânicos por orgânicos na alimentação de poedeiras semipesadas / Substitution of inorganic minerals for organic minerals in the diet of semi heavy layers

Avaliou-se o efeito da suplementação dietética de fontes orgânicas de microminerais para galinhas poedeiras sobre o desempenho e a qualidade do ovo. Foram utilizadas 216 aves de linhagem comercial, distribuídas num delineamento inteiramente ao acaso, com quatro tratamentos e nove repetições, com seis aves por parcela. O experimento teve duração de 140 dias, divididos em cinco ciclos de 28 dias. Os tratamentos consistiram de uma dieta basal formulada para atender às exigências nutricionais das aves, suplementada com minerais na forma inorgânica ou porcentagens de minerais orgânicos: T1 - Basal + 100% minerais inorgânicos; T2 - Basal + 100% minerais orgânicos; T3 - Basal + 66% minerais orgânicos; T4 - Basal + 33% minerais orgânicos. A produção de ovos, peso do ovo, massa de ovo, conversão alimentar por massa e dúzia de ovo, porcentagem de albúmen, gravidade específica, espessura de casca e margem bruta relativa apresentaram melhores resultados quando os minerais inorgânicos são substituídos em 66% pelos orgânicos.

This study evaluated the effect of the supplementation with organic microminerals on performance and egg quality of semi-heavy layers. Dekalk Brown layers (n=216) were distributed according to a completely randomized design into four treatments, nine repetitions and six birds per repetition. The experiment lasted 140 days and was comprised of five 28 day cycles. The basal diet was formulated to fulfill the nutritional requirements and was supplemented with organic or inorganic minerals, resulting in four treatments: T1 - basal + 100% inorganic minerals; T2 - basal + 100% organic minerals; T3 - basal + 66% organic minerals; T4 - basal + 33% organic minerals. Egg production, egg weight, egg mass, feed conversion for dozen and mass, albumen percentage, specific gravity, shell thickness and relative gross margin have better results when the inorganic minerals are replaced with 66% organic.

Carbohydrate content and antioxidative potential of the seed of three edible indica rice (Oryza sativa L.) cultivars.

Rice (Oryza sativa L.) grains or seeds are known to lose much of their nutrient and antioxidant contents, following polishing. The current study was undertaken to evaluate and compare the carbohydrate content and antioxidant parameters in the unpolished and polished seeds of three edible indica rice cultivars, namely Swarna (SW), the most popular indica rice cultivar in India and aromatic or scented cultivars Gobindobhog (GB) and Pusa Basmati (PB). While both the sucrose and starch content was the maximum in PB seeds (both unpolished and polished), the amylose content was the highest in SW polished seeds. SW polished seeds were superior as compared to GB and PB cultivars in terms of total antioxidant capacity, DPPH radical scavenging and Fe(II) chelation potential, as well as the highest lipoxygenase (LOX) inhibition or H2O2 scavenging potential, probably due to the maximum accumulation of total phenolics and flavonoids, the two important antioxidants. The reducing power ability was, however, identical in both SW and GB polished seeds. The PB polished seeds were more potent in superoxide and hydroxyl scavenging, whereas GB in nitric oxide (NO) scavenging. The common observation noted after polishing of seeds was the reduction in the level of carbohydrates and antioxidant potential, though the extent of reduction varied in the three cultivars. The only exception was GB, where there was no alteration in NO scavenging potential even after polishing. Our study showed the better performance of SW polished seeds with respect to higher amylose content and majority of the tested parameters governing antioxidant capacity and radical scavenging potential, thus highlighting the greater dietary significance of SW over the other two cultivars.