Available Phosphorus Levels in Diets for Muscovy Ducks in Housing

Abstract

The present study aimed to determine ideal levels of available phosphorus for muscovy ducks in housing. Two hundred and forty muscovy ducks of creole lineage were used, distributed in boxes with water and food ad libitum. The experimental design was completely randomized with treatments consisting of six nutritional plans that included the initial, growth and termination phases and differed in relation to available phosphorus levels, and four replicates of 10 muscovy ducks each. The birds had weekly performance evaluations, and after 90 days, eight birds (four males and four females) in each treatment were slaughtered for evaluation of carcass traits. Data collected were subjected to Tukey test at 5% of significance. Differences were not observed (p>0.05) in performance. Higher available phosphorus levels presented a positive influence (p<0.05) on carcass. Results presented differences (p<0.05) among sexes for carcass development and commercial cuts, with better feed efficiency of males than females in same period. For mineral composition, differences (p<0.05) were observed to calcium (%), phosphorus (%) and Ca:Pratio. The present study indicates that nutritional plan 2 (initial = 0.60%; growth = 0.55% and termination = 0.50%) presented ideal nutritional requirement of available phosphorus for muscovy ducks in housing, with better carcass development and mineral deposition on bones.

Effect of Dietary Calcium and Phosphorus Levels on Productive Performance, Carcass and Tibia Characteristics of Sudani Ducklings

“…However, ducklings fed 0.85% Ca + 0.40% P (T2; as a control group), 1.0% Ca + 0.45% P (T3) and 1.15% Ca + 0.50% P (T4) were presented better carcass parameters. These results are confirmed with Costa et al (2019) who affirm Muscovy ducklings fed diet contained higher available P (0.50-0.60%) produced the better carcass traits than those fed the low level of P. NS: non-significant; *: significant effect at P ≤ 0.05 ; T1: (0.70% Ca : 0.35% P); T2: (0.85% Ca : 0.4% P; as a control); T3: (1.0% Ca : 0.45% P), and T4 (1.15% Ca : 0.50% P).…”

Effects of particle size of corn and stocking densities on the performance, carcass traits and gastrointestinal tract development of Muscovy ducks in housing

“…Experimental diets (Table 1) were calculated according to the reference values provided by Rostagno et al (2011), except energy and protein (Ru no et al, 2015), calcium (Feijó et al, 2016), available phosphorus (Costa et al, 2019) and sodium (Santos et al, 2020) that used adequate requirements to Muscovy ducks. The composition of these diets was analyzed to con rm the proximate composition of the diets according to the methods described by the AOAC (2019), where moisture content was determined in an oven at 105°C according to method 925.10; ashes content was determined through mu e calcination at 550°C following method 923.03; lipid analyzes followed the method Ba 3-38; total proteins were performed according to the Kjeldahl method, following method 920.87; and the determination of bers content (crude ber, neutral detergent ber and acid detergent ber) was performed according to Van To avoid additional effects of particle size of diets in general, the other ingredients were standardized in a maximum particle size of 4 mm (MGD = 620 µm).…”

T Tingkah Laku Kawin Entog Ciayumajakuning pada System Pemeliharaan Intensif

“…Entog Cairinini seperti aix galericulata juga setelah kawin akan langsung menjauhi betina menuju tempat air untuk berenang (Costa et al, 2019). Tingkah laku itik mandarin setelah kawin diinisiasi oleh betina menuju sumber air untuk mandi dan melakukan preening (Yakubu & Ugbo, 2011).…”