Paper ID: 115

RESPONSES OF FOUR VARIETIES OF CARROT PLANT (DAUCUS CAROTA L.) GROWN IN MEDIUM LATITUDE TO DIFFERENT RATES OF FERTILIZATION

Authorship

Aluh Nikmatullah1*, Karwati Zawani1, Khairul Muslim1, Muhammad Sarjan2

1Faculty of Agriculture, University of Mataram, Jalan Majapahit No. 62 Mataram, 83115, West Nusa Tenggara, Indonesia

2Post-graduate Studies, University of Mataram, Jalan Pendidikan No. 37 Mataram 83125, West Nusa Tenggara, Indonesia

aluh_nikmatullah@unram.ac.id

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Abstract

A study was carried out to investigate the effect of different rates of NPK fertilization on growth and yield of carrot plants cultivated in medium latitude in Lombok Island. The experiment was conducted in Setiling Village of Central Lombok (at ca. 650 m above sea level) and arranged in Randomized Completely Block Design with two factors: carrot variety (v) and rates of NPK fertilization (n). The first factor comprised of four carrot varieties: Gundaling (v1), Ratu Jabar (v2), New Nantes (v3) and New Kuroda (v4), while the second factor comprised of four rates of NPK fertilization: 50 kg/ha (n1), 100 kg/ha (n2), 200 kg/ha (n3) and 400 kg/ha (n4). Growth of plants was evaluated every two weeks and after harvesting, the tap root samples were collected and evaluated for yield and tap-root quality. The results showed that there was no interaction between carrot varieties and the rate of NPK fertilization on influencing the growth and yield of carrot in medium latitude. However, growth and yield of carrot in medium latitude were significantly influenced by the variety and rate of NPK fertilization, as shown by differences in the ratio of above and below ground biomass, tap root texture and sweetness, tap-root length and diameter as well as the ratio of cortex to stele. Accordingly the suitable variety for cultivation in the medium latitude was Gundaling variety (v1), with a higher growth and yield were obtained by NPK fertilization at rate of 200 kg/ha (n3).

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