Energy and protein ratio in the diet plays an important role in laying quails production. High nutrient density could expose the quails into heat stress due to inefficient metabolic process and nutrient absorption. On the other hand, lower density possesses the risk of nutrient insufficiency. Both cases are potential in affecting the egg production. This study aimed to investigate the egg production patterns of quails fed different nutrient density with constant ratio of metabolizable energy (ME) and crude protein (CP). Egg production data was obtained from two hundred laying quails (Coturnix coturnix japonica) which were randomly assigned into two distinct experimental diets. Dietary treatments were given for eight weeks and replicated five times each with 20 quails. Two diets were formulated to contain High ME-CP (2,800 kcal/kg ME and 18.7% CP) and Low ME-CP (2, 600 kcal/kg ME and 17.3% CP). The data were analysed using t-test and egg production patterns were plotted. Quails fed with different nutrient density yielded similar egg production values and patterns. We fit non-linear mathematical model into the datasets; similar trends and fitness were also observed (R2 = 0.96). It is concluded that quail fed with different nutrient density exhibited minor difference in egg production pattern.
In tropical area, animals are prone to stress due to high environmental temperature hence affecting the production. Vitamin C has been offered as an agent to help animal to cope with heat stress. This paper aimed to estimate the consistency of quail’s egg production supplemented with vitamin C through repeatability estimates. A total of 136 quails (Coturnix coturnix japonica) were randomly allotted into 2 dietary treatments with 4 replicates each containing 17 quails. The dietary treatments were basal diet (T0) and basal diet + 250 mg/kg vitamin C (T1). Dietary treatments were given for 8 weeks in laying phase. In total we obtained 56 days of egg production data. Data were analysed using t-test to infer the differences between the treatments and analysis of variance (ANOVA) to obtain the repeatability value. The results showed that the supplementation of vitamin C increased egg production up to 14.3% (P<0.01). Repeatability value of T0 was higher (0.33) than T1 (-0.13). Quails given T0 has a high egg production consistency but produce lower egg production than T1. It is concluded that supplementation of vitamin C increased egg production but were not yet able to produce the optimal consistency.
Penelitian bertujuan untuk mengkaji pola produksi dan aplikasi model regresi logistik produksi telur puyuh yang diberi ransum dengan level protein berbeda. Sebanyak 225 ekor puyuh didistribusikan dalam 3 perlakuan dan 5 ulangan; jumlah puyuh masing-masing ulangan 15 ekor. Perlakuan yang diberikan adalah level protein kasar (PK) dalam ransum sebesar 16,5% (P1), 18% (P2) dan 19,5% (P3). Data produksi telur diambil sejak awal peneluran pada masa adaptasi dan selama dua periode produksi telur (2×28 hari) pada masa perlakuan. Data dianalisis menggunakan program R. Perlakuan P2 dan P3 menghasilkan produksi telur yang lebih tinggi daripada P1 (P<0.05). Model logistik produksi telur puyuh menunjukkan bahwa puncak produksi tertinggi dicapai oleh P3 sedangkan rentang dan laju produksi terbesar dicapai P1. Data aktual produksi telur memiliki kesesuaian (fitness) yang tinggi (R2=0,92–0,97) dengan model logistik. Berdasarkan hasil tersebut, disimpulkan bahwa semakin tinggi protein kasar menghasilkan produksi telur yang tinggi. Model regresi logistik dapat digunakan untuk menganalisis pengaruh perlakuan biologis terhadap produksi telur puyuh serta memiliki kesesuaian yang tinggi dengan data aktual.
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