Sains Malaysiana 46(4)(2017): 515–519

http://dx.doi.org/10.17576/jsm-2017-4604-01

Effects of Different Levels of Oxalic Acid Administration on Feed Intake and Nutrient Digestibility in Goats

(Kesan daripada Pelbagai Tahap Pemberian Asid Oksalik ke atas Pengambilan

Makanan dan Kebolehhadaman Nutrien pada Kambing)

MOHAMMAD MIJANUR RAHMAN¹*, MD. ROKIBUR RAHMAN¹, MITSUHIRO NIIMI²,

WAN EMBONG WAN KHADIJAH¹, RYO AKASHI² & RAMLI BIN ABDULLAH¹

¹Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Federal Territory, Malaysia

²Faculty of Agriculture, University of Miyazaki, Miyazaki Shi 889-2192, Japan

Received: 27 February 2015/Accepted: 9 October 2016

ABSTRACT

An experiment was carried out to investigate the effects of oxalic acid administration on feed intake and nutrient digestibility in goats. Four female cross bred (Boer × local) goats (average body weight of 46.3 kg) were randomly assigned to four experimental diets including oxalic acid administration at levels of 0, 2.25, 4.50 and 6.75 g/animal/d in a 4×4 Latin Square design. Oxalic acid diluted with water was administered orally via syringe to experimental goats once daily for four experimental periods. Each experimental period was lasted 21 d in length, comprising 14 d of adaptation to the experimental diet followed by 7 d of data collection. All the animals were individually fed with Napier grass ad libitum supplemented with 300 g (fresh basis) pelleted compound feed per goat per day throughout the study. Feed composition, feed intake, nutrient intake and nutrient digestibility were determined. Intakes of dry matter (DM), organic matter (OM), crude protein (CP), neutral detergent fibre (NDF) and metabolisable energy tended to linearly decrease with the increasing rate of oxalic acid administration, with the value in the 6.75 g oxalic acid/animal/d treatment being significantly (p<0.05) lower than the control (0 g oxalic acid/animal/d) treatment. The oxalic acid administration had no effect on apparent digestibilities of DM, OM, CP and NDF. The experiment demonstrated that oxalic acid administration may influence in the DM and nutrient intakes, but not influence on DM and nutrient digestibilities in goats.

Keywords: Feed intake; goats; nutrient digestibility; oxalic acid

ABSTRAK

Penyelidikan ini telah dijalankan untuk mengkaji kesan pemberian asid oksalik ke atas pengambilan makanan dan kebolehhadaman nutrien dalam kambing. Empat baka kacukan kambing betina (Boer × tempatan) (berat badan purata 46.3 kg) secara rawak telah diperuntukkan kepada empat uji kaji diet termasuk pemberian asid oksalik pada peringkat 0, 2.25, 4.50 dan 6.75 g/haiwan/hari dalam reka bentuk segi empat sama Latin 4 × 4. Asid oksalik yang dicairkan dengan air diberi secara oral melalui picagari untuk kambing uji kaji sekali sehari untuk tempoh empat uji kaji. Setiap tempoh uji kaji telah berlangsung selama 21 hari; 14 hari untuk penyesuaian diet uji kaji diikuti dengan 7 hari pengumpulan data. Semua haiwan secara individu telah diberi makan rumput Napier secara ad libitum ditambah dengan sebatian pelet 300 g (segar) setiap hari sepanjang kajian ini. Pengambilan komposisi, pengambilan makanan, pengambilan nutrien serta kebolehhadaman nutrien telah ditentukan. Pengambilan bahan kering (DM), bahan organik (OM), protein kasar (CP), gentian detergen neutral (NDF) dan tenaga boleh dimetabolis cenderung untuk mengurangkan secara linear kadar peningkatan asid oksalik, dengan nilai rawatan asid/haiwan/hari 6.75 g secara bererti (p<0.05) lebih rendah berbanding kawalan (0 g asid/haiwan/hari). Pemberian asid oksalik tidak mempunyai kesan yang jelas ke atas kebolehhadaman DM, OM, CP dan NDF. Kajian ini menunjukkan bahawa pemberian asid oksalik boleh mempengaruhi pengambilan DM dan nutrien, tetapi tidak mempengaruhi DM dan kebolehhadaman nutrien dalam kambing.

Kata kunci: Asid; kambing; kebolehhadaman nutrien; pengambilan makanan

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*Corresponding author; email: mijanur@um.edu.my