Evaluasi Kecukupan Nutrien dan Validasi Kesesuaian Pertambahan Bobot Badan Harian Domba Ekor Gemuk di Peternakan Rakyat

Abstract

Penelitian ini bertujuan mengevaluasi kecukupan nutrien dan membandingkan kesesuaian nilai pertambahan bobot badan harian (PBBH) observasi dengan estimasi berdasarkan model Jayanegara et al. (2017). Data dikumpulkan dari 68 ekor domba Ekor Gemuk di tiga peternakan rakyat, mencakup konsumsi pakan dan PBBH, dengan 13 ekor dipilih sebagai subpopulasi analisis. Evaluasi dilakukan dengan membandingkan konsumsi bahan kering (BK), protein kasar (PK), dan total digestible nutrient (TDN) dengan standar kebutuhan menurut model serta membandingkan nilai PBBH observasi dengan estimasi. Hasil menunjukkan bahwa konsumsi BK, PK, dan TDN berada di bawah estimasi standar kebutuhan. Perbandingan PBBH observasi dan estimasi menunjukkan hubungan korelasi dan concordance correlation coefficient (CCC) lemah, koefisien determinasi yang rendah (R²=1,3–3,2%), serta nilai root mean square percentage error (RMSPE) tinggi (>80%) yang berarti rendahnya tingkat kesesuaian karena keterbatasan data pengamatan, sehingga estimasi model belum sepenuhnya mampu mempresentasikan kondisi pertumbuhan aktual domba Ekor Gemuk di lapangan.

This study aimed to evaluate nutrient adequacy and to compare the agreement between observed and estimated average daily gain (ADG) based on the model proposed by Jayanegara et al. (2017). Data were collected from 68 fat-tailed sheep raised at three smallholder farms, including feed intake and ADG records, with 13 sheep selected as a subpopulation for in-depth analysis. The evaluation was conducted by comparing the intake of dry matter (DM), crude protein (CP), and total digestible nutrient (TDN) against the nutrient requirements estimated by the model, as well as by comparing observed and estimated ADG values. The results showed that DM, CP, and TDN intakes were below the estimated standard requirements. The comparison between observed and estimated ADG indicated a weak correlation and concordance correlation coefficient (CCC), low coefficients of determination (R² = 1.3–3.2%), and high root mean square percentage error (RMSPE > 80%), suggesting a low level of agreement. These imply that the model's estimates do not yet adequately reflect the actual growth performance of fat-tailed sheep under field conditions, possibly due to limitations in observational data.