Produksi limbah tanaman salak Sidempuan dapat mencapai 31-43% per tahun atau setara dengan 260-310 ton per tahun. Produksi biomassa limbah tersebut dapat berpotensi dijadikan sebagai sumber pakan alternatif untuk ternak rumiansia seiring dengan ketersediaan lahan untuk penyediaan hijauan makanan ternak yang semakin minim. Penelitian bertujuan untuk mengetahui pengaruh perbedaan lama simpan dan jenis pengemas terhadap kualitas fisik wafer ransum komplit. Penelitian ini dilaksanakan di laboratorium Industri Makanan Ternak, Fakultas Pertanian Universitas Graha Nusantara Padang Sidempuan dan Kelompok Tani Desa Satahisaoloan. Penelitian menggunakan rancangan acak lengkap pola faktorial 4x3 dengan 2 faktor (bahan pengemas dan lama penyimpanan) dan 3 ulangan. Parameter penelitian meliputi kualitas fisik wafer yakni bobot wafer, kadar air, kerapatan wafer dan daya serap air. Hasil penelitian menunjukkan bahwa bahan pengemas berbeda mempengaruhi kualitas fisik pakan wafer. Sedangkan, faktor penyimpanan tidak mempengaruhi performa fisik wafer. Dapat disimpulkan bahwa interaksi bahan pengemas kantong plastik dengan umur simpan 7 hari memberi performa fisik wafer yang lebih baik.

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Pakan merupakan biaya terbesar dalam produksi peternakan. Pakan yang mengandung antibiotik sudah dilarang penggunaanya karena menimbulkan residu pada ternak sehingga dapat mengganggu kesehatan manusia. Solusi untuk mengganti penggunaan antibiotik adalah dengan penggunaan prebiotik. Salah satu sumber prebiotik adalah ubi jalar. Potensi ubi jalar sebagai sumber prebiotik karena adanya senyawa rafinosa dan meltotriosa. Oligosakarida berupa rafinosa pada ubi jalar merupakan sumber makanan bagi probiotik, karena di dalam usus rafinosa tidak diserap sehingga mikroba berperan dalam mencerna gugus gula rafinosa. Selain itu, produksi ubi jalar juga sangat melimpah di Indonesia. Penelitian ini bertujuan untuk menguji efektivitas pemberian prebiotik ubi jalar merah, putih dan ungu dengan menggunakan cairan rumen untuk melihat kecernaan bahan kering, bahan organik, VFA total dan total bakteri secara in vitro. Metode penelitian dilakukan dengan cara in vitro dan koloni bakteri dihitung dengan metode pencacahan koloni bakteri hidup dengan 4 perlakuan dan 3 kali ulangan. Berdasarkan hasil penelitian ini disimpulkan bahwa ubi putih merupakan sumber prebiotik yang paling baik digunakan, karena pada ubi putih jumlah koloni bakteri probiotik yang tumbuh lebih tinggi dibandingkan ubi merah, ungu, dan ransum kontrol.

Feed alternative is become the major concern for livestock industry in order to provide the continuously feeding. Feed technology system based on agriculture wastes were the modified strategy to gain the other sources of feed raw materials. Salak Sidempuan is performed similar with the Palm plantations which is produced the potential midrib waste. Nutritionally, the product will feed the animal to increase the performance. The research aims to evaluate the proximate profile especially the fiber contents of midrib waste of Salak Sidempuan fermented with white root fungi. The fifth experiments were evaluated after the measuring period by using the Phanerochaete chrysosporium and replicated in 4 times. Experiments were P0 (control), P1 (5%inoculant of P. chrysosporium), P2 (10%inoculant of P. chrysosporium), P3 (15%inoculant of P. chrysosporium), and P4 (20%inoculant of P. chrysosporium). A completely randomized design was used to determine the statistical effect on dry matter, organic matter, crude fiber and lignin. Results showed that the addition of inoculant about 20% signifantly effected the increasing on dry matter and organic matter while followed the decreasing of fiber contents. In conclusion, fermentation of midrib waste with Phanerochaete chrysosporium is potentially degradated  the fiber content itselves.

A type of spice that is still limited to use with primary commodities is andaliman [Zanthoxylum acanthopodium DC]. Geographically, the spice is only found in the district of Toba Samosir which is closed to Lake Toba. The herb plant is a group of family Rutaceae and has identified with the name of Andaliman [Batak pepper]. The chemical compound that is thought to have the most role in various biological activities of andaliman fruit as an antioxidant and antimicrobial for food processing. Research conducted to determine the phytochemical compounds, the group of secondary metabolites within the extraction, and the influence of antimicrobial compounds from essential oils on salted eggs. Parameters were chemical compounds from different extracted and quality of the eggs. The chemical composition of each extract was examined by both the Harborne method and GC-MS. Results showed that phytochemical contents contained steroid and triterpenoid for three types of extraction with no detect for saponin. Antimicrobial compounds sourcing from andaliman extracts can inhibit the Staphylococcus aureus. Besides, the quality profile of salted eggs by ripening with andaliman extracts was significantly influenced comparing with control. It can be concluded that the active components of andaliman extract have potentially affected the quality of salted eggs.