Effects of chelating agents on the performance of growing chickens fed high calcium diets

1991 ◽  
Vol 31 (6) ◽  
pp. 765
Author(s):  
TM Shafey
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Phytic Acid ◽  
Feed Efficiency ◽  
Chelating Agents ◽  
Body Weight Gain ◽  
Dietary Calcium ◽  
Reduced Body ◽  
High Calcium ◽  
High Calcium Diet

The effects of supplementation with chelating agents on the growth performance of chickens fed high calcium diets were investigated in 2 experiments. In experiment 1, increasing dietary calcium to 25.2 g/kg significantly reduced body weight gain and feed efficiency. The addition of phytic acid (10 g/kg) tended to improve body weight gain of chickens fed high calcium diets; however, the gain was not significantly different from that of birds fed the high calcium diet. The addition of either Na2EDTA (1 g/kg) or proline (10 g/kg) to a high calcium diet did not affect body weight gain or feed efficiency of chickens. In experiment 2, increasing dietary calcium to 26 g/kg significantly reduced body weight gain and feed efficiency and increased plasma total calcium concentration. The addition of cellulose significantly (P<0.01) reduced plasma calcium and tibia calcium concentrations; however, the performance of chickens fed high calcium diets was not affected by the addition of cellulose. It was concluded that chelating agents differ in their ability to eliminate the toxic effects of high calcium diets, and that the addition of phytic acid at 1% was most successful in eliminating the growth depressing effect of high dietary calcium.

scholarly journals PSXII-22 Genomic prediction accuracy for feed efficiency related traits using different pseudo-phenotypes, prediction and validation methods in Nellore cattle

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 245-246
Author(s):  
Cláudio U Magnabosco ◽  
Fernando Lopes ◽  
Valentina Magnabosco ◽  
Raysildo Lobo ◽  
Leticia Pereira ◽  
...  
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Genomic Prediction ◽  
Feed Efficiency ◽  
Prediction Accuracy ◽  
Body Weight Gain ◽  
Prediction Methods ◽  
Genomic Breeding ◽  
Validation Population ◽  
Nellore Cattle

Abstract The aim of the study was to evaluate prediction methods, validation approaches and pseudo-phenotypes for the prediction of the genomic breeding values of feed efficiency related traits in Nellore cattle. It used the phenotypic and genotypic information of 4,329 and 3,594 animals, respectively, which were tested for residual feed intake (RFI), dry matter intake (DMI), feed efficiency (FE), feed conversion ratio (FCR), residual body weight gain (RG), and residual intake and body weight gain (RIG). Six prediction methods were used: ssGBLUP, BayesA, BayesB, BayesCπ, BLASSO, and BayesR. Three validation approaches were used: 1) random: where the data was randomly divided into ten subsets and the validation was done in each subset at a time; 2) age: the division into the training (2010 to 2016) and validation population (2017) were based on the year of birth; 3) genetic breeding value (EBV) accuracy: the data was split in the training population being animals with accuracy above 0.45; and validation population those below 0.45. We checked the accuracy and bias of genomic value (GEBV). The results showed that the GEBV accuracy was the highest when the prediction is obtained with ssGBLUP (0.05 to 0.31) (Figure 1). The low heritability obtained, mainly for FE (0.07 ± 0.03) and FCR (0.09 ± 0.03), limited the GEBVs accuracy, which ranged from low to moderate. The regression coefficient estimates were close to 1, and similar between the prediction methods, validation approaches, and pseudo-phenotypes. The cross-validation presented the most accurate predictions ranging from 0.07 to 0.037. The prediction accuracy was higher for phenotype adjusted for fixed effects than for EBV and EBV deregressed (30.0 and 34.3%, respectively). Genomic prediction can provide a reliable estimate of genomic breeding values for RFI, DMI, RG and RGI, as to even say that those traits may have higher genetic gain than FE and FCR.

scholarly journals PERFORMANS BURUNG PUYUH (Coturnix-Coturnix Japonica) FASE GROWER YANG DIBERIKAN TEPUNG MANURE HASIL DEGRADASI LARVA LALAT HITAM (H. illucensL.) MENGGANTIKAN TEPUNG IKAN DALAM RANSUM

ZOOTEC ◽  
2019 ◽  
Vol 39 (2) ◽  
pp. 477
Author(s):  
Yasmira Wenda ◽  
H.J. Manangkot ◽  
J.L.P. Saerang ◽  
Cherlie L. K. Sarajar
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Feed Efficiency ◽  
Fish Meal ◽  
Body Weight Gain ◽  
Coturnix Japonica ◽  
Coturnix Coturnix Japonica ◽  
Black Fly ◽  
Coturnix Coturnix ◽  
Fly Larvae

QUAIL (Coturnix-Coturnix Japonica) GROWER PERFORMANCE SUPPLIED WITH MANURE FLOUR DEGRADED BY BLACK FLY LARVAE (H.ILLUCENS L.) TO REPLACE FISH MEAL. This study aims to determine the manure yield of black fly larvae replacing fish meal in the quail feed of the grower phase. The materials used in this study were 100 unsexed quails, 3 weeks old; the dimension of cage was 40 x 40 x 20 cm. The quails were arranged randomly in each unit. The study was realized by using a completely randomized design (CRD) with 4 treatments and 5 replications. The treatments were R0 = 0% degraded manure flour (MHD); R1 = 4% MHD flour; R2 = 8% MHD flour; R3 = 12% MHD flour. The research variables consisted of ration consumption, body weight gain and feed efficiency. The results obtained showed that treatments provide a very significant influence (P <0.01) on ration consumption. Body weight gain and feed efficiency were not significant different (P> 0.05). The conclusion of this study is that MHD flour up to the 12% level can be used in quail rations replacing fish meal. Keywords: Quail, MHD, Fish meal.

The effect of artificial lighting and cobalt supplementation on the performance and coat shedding of steers intensively finished in yards

1969 ◽  
Vol 9 (38) ◽  
pp. 278
Author(s):  
JG Morris
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Feed Efficiency ◽  
Body Weight Gain ◽  
Feed Conversion ◽  
Abrupt Increase ◽  
Or Efficiency ◽  
Artificial Lighting ◽  
Sorghum Silage ◽  
Sorghum Grain

Forty steers were intensively finished in yards on rations of 90 per cent sorghum grain and 10 per cent of either sorghum silage or stubble. There were no significant differences in rate of body weight gain or efficiency of feed conversion of steers fed the two rations. The experiment commenced on July 2, 1965. An abrupt increase at this time in daylength by flood-lighting, for two 2-hour periods daily, had no significant effect on rate of body weight gain, feed efficiency or coat shedding of steers subjected to natural seasonal increases in daylength. The administration of a cobalt pellet to steers fed a low-cobalt sorghum grain had no effect on coat shedding or rate of body weight gain.

scholarly journals Effects of supplemental phytase on performance and tibia ash of broilers fed different cereals based diets

2011 ◽  
Vol 49 (No. 12) ◽  
pp. 542-548 ◽  
Author(s):  
J. Pintar ◽  
B. Homen ◽  
K. Gazić ◽  
D. Grbeša ◽  
M. Sikirić ◽  
...  
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Body Weight Gain ◽  
Dietary Calcium ◽  
Feed Consumption ◽  
Feed Conversion ◽  
Control Groups ◽  
Broiler Performance ◽  
Beneficial Effects ◽  
Tibia Ash

A 21-day experiment with day-old broilers was conducted in order to assess the effect of phytase supplementation to different cereals-soybean meal based diets on broiler performance and tibia ash. Diets were formulated to contain 4 different cereals (maize, wheat, triticale and barley), 2 levels of dietary calcium (0.6 and 1.0%) and 3 levels of supplemental phytase (0, 500 and 1 000 PU/kg). Supplemented phytase had beneficial effects on broiler performance. It significantly increased body weight gain (P &lt; 0.0003) and feed consumption (P &lt; 0.0361) by 6 and 7% in comparison with the control groups, respectively. No influence on feed conversion ratio and tibia ash was detected. Both body weight gain and feed intake were also significantly influenced by different cereals (P &lt; 0.0001 and 0.0348, respectively). The increasing dietary calcium level resulted in a significant increase in body weight gain (P &lt; 0.0024) and tibia ash (P &lt; 0.0016). Effects of 500 and 1 000 PU/kg were not statistically different between themselves. &nbsp;

scholarly journals Effect of replacing maize and starch with Shoti meal (Curcuma zedoaria) in broiler

2018 ◽  
Vol 47 (1) ◽  
pp. 40-46
Author(s):  
S Datta ◽  
S Rahman ◽  
O Islam ◽  
M Hassan ◽  
M Hossain ◽  
...  
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Feed Efficiency ◽  
Dry Matter ◽  
Body Weight Gain ◽  
Control Diet ◽  
Broiler Chicks ◽  
Curcuma Zedoaria ◽  
Physical Treatment ◽  
Dry Matter Digestibility

The effects of raw and autoclaved Shoti (Curcuma zedoaria) meal on the growth and N utilization of growing broilers were determined. Shoti from Bangladesh Agricultural University campus was collected and sorted on the basis of white color of the rhizome. Then they were chopped into pieces, sun dried and pulverized in a flour mill. Aliquot samples were autoclaved at 1200C under 15 lb of pressure per square inch for 30 min. Autoclaved samples were stored in tightly lid contained for future use. 3 One hundred -day-old Cobb 500 broiler chicks were reared on the floor and a total of 24 growing broilers, 4 birds in each group were weighed on d 15 Two broilers were placed in each cage. There were a total of four experimental and two control (positive and negative Non-protein control) diets. Diets were fed ad libitum from day 15 to 33days. Body weight, feed intake, feed refusal and fecal weights were recorded every day. Cumulative feed efficiency per bird was calculated as the ratio of weight gained to feed consumed. Dry matter of excreta was determined from the last 10 d of feeding trial by drying aliquots of every day’s droppings by drying for 6 h at 1050C. On d 19, birds were bled to death. Immediately after slaughter, the carcasses were examined systematically. The chemical composition of Shoti meal showed that it is low in protein, fat and trace minerals and therefore mainly a source of energy. The bulk of the tuber (75 percent) consists of carbohydrates, made up of 10.6% fiber, and 64.9% nitrogen free extracts (NFE). A peculiarity of Curcuma rhizome meal contains high level of ash (9.9%) on DM basis. The results showed that at day 33, the weight of the broiler chicken fed shoti 100g, 200g, 300 g and 200g (autoclaved shoti meal)/ Kg diet was significantly different from the weight of the chicken fed on a maize-soybean diet. The birds given shoti meal consumed less feed than those provided with a maize diet. Feed efficiency or weight gain to feed ration over 19-d period was the poorest when fed 300 g Shoti/ Kg diet. Intake picked up when the shoti meal was incorporated after having been autoclaved and there was slight improvement in body weight gain as compared to that of other Shoti fed group. However, feed efficiency and body weight gain as % of initial weight remained significantly lower than the maize-soybean control. The inclusion of Shoti meal generally had an adverse effect on the apparent dry matter digestibility compared with the control diets. The group fed autoclaved shoti meal had a similar effect and the true N digestibility was the lowest when compared to those of control fed on maize-soybean meal. Thus, physical treatment like using autoclave, caused further reduction of digestibility of its N. Lipid digestibility was reduced by ingestion of shoti meal. Since the diets were isocaloric, after correction for the apparent endogenous lipid losses, which were obtained from the results of non-protein control feeding, the net faecal losses was around 66.2% of the ingested lipid against control diet fed birds. Bang. J. Anim. Sci. 2018. 47 (1): 40-46

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