Replacement of soybean meal with levels of inclusion of soya waste in the diet of growing goats


An experiment was conducted to investigate the effect of replacing soybean meal with soya waste at different levels on intake, digestibility and growth in goats. Eighteen male goat kids with initial body weight (BW) of 13.0 kg were distributed equally to three dietary groups. They were fed Napier grass (Pennisetum purpureum) and concentrate mixture, and each goat was assigned to an individual pen. Soybean meal in the concentrate mixture was replaced with soya waste at 0% (T1), 50% (T2) and 100% (T3) levels in respective dietary groups. These diets were isocaloric and isonitrogenous. Results showed that animals fed T3 diet exhibited higher Napier grass intake than those fed T1 or T2 diet. There was no influence on total intakes of dry matter (DM), organic matter (OM), crude protein (CP), metabolic BW, per cent BW and metabolisable energy by the dietary groups. However, there was an increasing trend on intake and digestibility of neutral detergent fibre (NDF) with increasing levels of soya waste in the diets. Animals fed T3 diet showed higher intake and digestibility of NDF than those fed T1 diet. There was no influence of the dietary groups on digestibilities of DM, OM and CP. Similarly, there was no effect of them on the final BW, total BW gain, daily BW gain, feed conversion ratio and feed cost. Soya waste can replace 100% soybean meal in diets for growing goats, because no change was observed in nutrient intake, digestibility and growth performance; inclusion of soya waste enhanced the intake and digestibility of NDF.

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This study was supported by IPPP Research Grant (BK006-2015) of University of Malaya and an internal grant (R/SGJP/A07.00/01597A/001/2018/000448) of Universiti Malaysia Kelantan.

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Mohammad Mijanur Rahman, Ramli Bin Abdullah and Ryo Akashi designed the experiment, Mohammad Mijanur Rahman and Ramli Bin Abdullah carried out the analysis, Khairiyah Binti Mat, Maryana Mohamad Nor and Genki Ishigaki assisted with data analysis, Mohammad Mijanur Rahman and Ryo Akashi arranged the scientific content, and Khairiyah Binti Mat, Mohammad Mijanur Rahman and Maryana Mohamad Nor drafted the manuscript. All authors contributed editorial suggestions and supported the final manuscript draft.

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Correspondence to Mohammad Mijanur Rahman.

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Rahman, M.M., Abdullah, R.B., Mat, K.B. et al. Replacement of soybean meal with levels of inclusion of soya waste in the diet of growing goats. Trop Anim Health Prod (2020).

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  • Digestibility
  • Feed conversion ratio
  • Feed intake
  • Growth
  • Napier grass
  • Soya waste