i ABSTRAK
AMRY MELINDRA : Respon Pertumbuhan Beberapa Varietas Kentang (Solanum tuberosumL.) pada Tanah yang di Inokulasikan Nematoda (Meloidigyne spp.) dan Pemberian Beberapa Bahan Organik di bimbing oleh LUTHFI A. M SIREGAR dan KHAIRUNNISA LUBIS. Tujuan dari penelitian ini untuk mengetahui respon pertumbuhan beberapa varietas yang kentang diaplikasikan bahan organik ke dalam media tanam inokulasi nematoda. Penelitian ini dilakukan di kebun balai penelitian tanaman berastagi, provinsi sumatera utara dari bulan mei 2016 sampai november 2016. Menggunakan rancangan acak kelompok dengan dua faktor ; faktor pertama adalah bahan organik (mucuna dan kacang tanah) dan faktor kedua adalah varietas (Tenggo, Maglia, dan Margahayu). Hasil penelitian menunjukkan bahwa bahan organik meningkatkan tinggi tanaman, jumlah daun, bobot basah tajuk, bobot basah akar, bobot umbi dan jumlah umbi. Namun, bahan organik juga meningkatkan jumlah nematoda. Varietas tenggo dan maglia menunjukkan pengaruh yang nyata terhadap semua karakter yang diamati. Interaksi kedua perlakuan tersebut berpengaruh nyata terhadap tinggi tanaman, bobot basah tajuk, jumlah puru akar dan jumlah umbi. Namun, tidak ada pengaruh nyata pada peubah amatan jumlah daun, berat basah akar, dan bobot umbi.
Kata kunci : bahan organik, nematoda, varietas
ii ABSTRACT
AMRY MELINDRA. The growth response of several potato varieties – infected meloidogyne spp. and addition of organic matters, supervised by LUTHFI A. M SIREGAR and KHAIRUNNISA LUBIS. This research was aimed to determine the growth response of several potato varieties which were applied by organic materials into the planting medium inoculated nematodes. The research was conducted at Research Station of Horticulture in Berastagi, North Sumatra Province from May 2016 to November 2016. The randomized block design was used with two factors ; the first factor was organic materials (mucuna and peanut) and the second factor was varieties (Tenggo, Maglia, and Margahayu). The results showed that organic matters increased the height of the plants, the number of leaves, the shoot fresh weight, the root fresh weight, the tuber weight and the number of tubers. However, organic matters also increased the number of nematodes. Varieties of Tenggo and Maglia showed significant affect to all observed characters. The interaction of the two treatments had significant affect to the plant height, the shoot fresh weight, the number of root-knot, and the number of tubers. However, no significant affect was observed in the number of leaves, root wet weight, and tuber weight.
Keywords : varieties, nematodes, organic materials
