KAJIAN SIFAT FISIK DAN KIMIA PADA BERBAGAI KLON UBI JALAR (Ipomoea batatas L.) A Study Of Phisical and Chemical Properties On Various Clons Of YAM (Ipomoea batatas L.) Ari Sandi1, Mardhiah Hayati2, Rita Hayati2* 1Program Studi Agroteknologi, Fakultas Pertanian, Universitas Syiah Kuala ABSTRAK Penelitian ini bertujuan untuk mengetahui sifat fisik dan sifat kimia pada berbagai klon ubi jalar. Penilitian ini juga ingin mendapatkan klon-klon ubi jalar yang terbaik dengan sifat fisik dan kandungan kimia tertentu sehingga disukai konsumen. Peubah yang diamati adalah sifat fisik (diameter umbi, panjang umbi, warna umbi), sifat kimia (kadar air, kadar abu, kadar lemak, kadar protein, kadar karbohidrat), dan uji organoleptik (bentuk umbi, tekstur kulit umbi, tekstur daging umbi, warna kulit umbi, warna daging umbi, rasa umbi, penerimaan keseluruhan umbi). Hasil penelitian menunjukkan bahwa Analisis sifat fisik berpengaruh sangat nyata terhadap umbi ubi jalar, umbi ubi jalar yang memiliki diameter umbi terbesar dan umbi terpanjang adalah terdapat pada klon CIP-513, CIP-B9, SARI, dan CIP-W. Dengan nilai L (kecerahan) tertinggi terdapat pada klon CIP-204 dan klon lokal Saree kuning, dan nilai a (merah) tertinggi terdapat pada klon CIP-1945, CIP-513, CIP-440137, CIP-286, CIP-287, CIP-W, CIP-W104, dan klon lokal Saree krem, serta nilai b (kuning) tertinggi terdapat pada klon CIP-LSQ dan klon lokal Saree kuning. Analisis sifat kimia berpengaruh sangat nyata terhadap umbi ubi jalar, yaitu kadar air dan kadar abu tertinggi terdapat pada klon lokal Saree krem, kadar protein tertinggi terdapat pada klon CIP-BDG dan CIP-WHI-5, dan kadar karbohidrat tertinggi terdapat pada klon CIP-CER. Uji organoleptik berpengaruh sangat nyata terhadap umbi ubi jalar, yaitu bentuk umbi yang terbaik dengan bentuk bulat terdapat pada klon CIP-513, tekstur kulit umbi dan tekstur daging umbi terbaik dengan tekstur halus terdapat pada klon CIP-MAN, CIP-BDG, CIP-WHI-5, CIP-204, CIP-B19, CIP-287, CIP-GA, CIP-SARI, lokal Saree krem, klon lokal Saree orange, warna kulit umbi dan warna daging umbi terbaik terdapat pada klon CIP-1945, CIP-BDG, dan CIP-W, rasa umbi terbaik dengan rasa manis terdapat pada klon CIP-B9, dan penerimaan keseluruhan umbi terbaik terdapat pada klon CIP-GA. Kata kunci : Ipomoea batatas L., sifat fisik, sifat kimia. ABSTRACT This study was meant to know the physical and chemical properties of various types of jam clones. It was also intended to find out best clones of yam with certain physical and chemical properties for consumers. The observed variables were physical properties (tuber diameter, tuber length, tuber color), chemical properties (moisture content, ash content, fat content, protein content, carbohydrate content), and organoleptic test (tuber form, tuber skin texture, content texture, skin color of tuber, color of tuber content, flavor of tuber, whole tuber acceptance). The result of this research showed that physical properties have significant effect on yam tuber, the tuber which has the biggest tuber diameter and longest tuber was found in CIP-513, CIP-B9, SARI, and CIP-W clones. While the highest L (brightness) value found in CIP-204 clones and local clones of yellow Saree, and the highest a (red) value was found in CIP-1945, CIP-513, CIP-440137, CIP-286, CIP-287, CIP -W, CIP-W 104, and local cream Saree, and the highest b (yellow) value was found in CIP-LSQ clones and local yellow Saree clones. The analysis of chemical properties had a very significant effect on yam tubers in which the highest water content and ash content was found in the local cream Saree clones, the highest protein content was found in CIP-BDG and CIP-WHI-5 clones, and the highest carbohydrate content was found in C1P- CER. The organoleptic test has a very significant effect on yam tubers, which is the best bulb shape with round shape found in CIP-513 clones, the best tuber skin texture and texture of the best tuber content in CIP-MAN clones, CIP-BDG, CIP-WHI -5, CIP-204, CIP-B19, CIP-287, CIP-GA, CIP-SARI, local Beige Saree, local grey Saree orange, tuber skin color and best tuber color available on CEP-1945 clone, CIP-BDG , And CIP-W, the best sweetness flavor with sweetness is found in C1P-B9 clones, and the best overall tuber acceptance is in CIP-GA clones. Keywords: Ipomoea batatas L., physical properties, chemical properties.