Effects of dietary boron on performance, egg production, egg quality and some bone parameters in layer hens

Abstract

In this study dietary boron at different doses (0, 25, 50, 100 and 200 mg/kg feed) was supplemented to layers from 4 to 64 weeks of age. There was no significant difference between treatments with respect of mortality, egg production, egg weight, egg mass and cracked eggs. Significant increases were observed in body weight as age rose. Body weight was not affected by dietary boron supplementation at 16 and 40 weeks of age. At 64 weeks of age boron additions of 50, 100 and 200 mg/kg to the diet resulted in significant lower body weights than that of the control group. Egg quality parameters; albumen height and Haugh units, were improved when 25 or 50 mg boron/kg diet was supplemented above the other treatments. Shape index, shell thickness, shell breaking strength were not affected by treatments, though 25 mg boron/kg diet tended to increase shell breaking strength. Tibia bone strength and phosphorus content in the tibia and femur were not affected by boron supplementation. Boron supplementation at 25 and 50 mg/kg significantly increased femur bone strength, and ash and calcium content of the tibia and femur bones. Concentration of boron in bone increased with the increase in dietary boron.

The Influence of Dietary Boron Supplementation on Performance and Some Physiological Parameters in Bandarah Chickens 2- Laying Period

“…While, egg weight was increased by increasing boron level by 2.29, 3.09 and 5.20% for 100, 200 and 300 mg boron, respectively over the control group but these increases were not significant. Results are in agreement with those reported by Mizrak et al (2010) who found that, supplementation of 25-200 mg boron/kg to hens during a period of 4-64 weeks of age did not affect the productive performance of the layers. Similarly, Sizmaz et al (2014) showed no significant effect in the egg production, feed intake and feed efficiency of laying hens fed diet added with 60 and 180 mg boric acid/kg.…”

Effect of Boron on Thymic Cytokine Expression, Hormone Secretion, Antioxidant Functions, Cell Proliferation, and Apoptosis Potential via the Extracellular Signal-Regulated Kinases 1 and 2 Signaling Pathway

“…Furthermore, lack of boron can also damage immune and reproductive functions in animals, leading to exacerbated adjuvant arthritis, testicular and ovarian atrophy, decreased sperm count, increased sperm deformity, blocked oocyte maturation in rats, and impaired mouse embryo development. , In addition, reduced plasma steroids, alkaline phosphatase, and calcium and magnesium ion concentrations have been reported to be caused by boron insufficiency. , Appropriate boron supplementation can increase the mRNA levels of bone-growth-related genes in mouse osteoblasts, such as type I collagen and osteocalcin, increase the plasma levels of total cholesterol, triglycerides, low-density lipoprotein, glucose, insulin, and non-esterified fatty acids in pregnant cows, and improve the metabolism during the perinatal phase . Furthermore, sufficient boron levels can enhance the activity of long-term cryopreserved mesenchymal stem cells and promote osteoblast and chondrocyte differentiation from human tooth germ stem cells, increase animal growth performance and feed conversion, improve egg quality, increase the level of antibodies in rats injected with human typhoid vaccine, and reduce the number of circulating natural killer (NK) cells and CD8a + /CD4 – cells. , However, supplementation with high doses of boron or high levels of boron exposure can result in significant injuries and even toxicity in animals, increase prenatal fetal mortality, reduce fetal weight and organ weight, and damage cardiovascular and central nervous systems as well as the bone development of fetuses . Moreover, supplementation with high doses of boron has been shown to induce testicular atrophy, seminiferous tubule abnormalities, and spermatogenic cell loss and block sperm development and discharge as well as cause the formation of bi- and micronucleated lymphocytes and acute leukemia cells in vitro , leading to mitochondrial swelling and an increase of the number of apoptotic cells .…”

Moderate dietary boron supplementation improved growth performance, crude protein digestibility and diarrhea index in weaner pigs regardless of the sanitary condition

“…However, it is contradictory to the findings in the present study because boron supplementation linearly reduced the plasma phosphorus concentrations. Moreover, the impact of boron supplementation on phosphorus digestibility and plasma concentrations is inconsistent in the previous studies as reported by Mızrak et al [ 26 ]. Nevertheless, it has been found that increased boron supplementation to pigs increased phosphorous level in bone whereas calcium level was not impacted [ 2 ].…”