TANGGAPAN PERTUMBUHAN DAN HASIL KEDELAI HITAM TERHADAP PENGGUNAAN PUPUK ORGANIK DAN BIOPESTISIDA GULMA SIAM (Chromolaena odorata)

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ABSTRACT: The aim of the research was to study the effect of dosage compost and biopesticide of Siam Weed  and the interaction on the growth and yield of black soybean. The experiment was conducted in Banguntapan experiment field of Agriculture Faculty, Gadjah Mada University, Yogyakarta from May 2003 to August 2003.
The experiment was arranged  in Randomized Completed Design consisted of 3 x 3 factorial treatments + 3 controls with three replications. The first factor were 3 levels of Siam Weed compost application, i.e.: 10, 20, and 30 t/ha. The second factor were 3 levels of biopesticide concentration, i.e.: 1, 2, and 3 %. Each of treated plant is given 50 kg/ha Urea, 100 kg/ha TSP and 100 kg/ha KCl. The control consist of  3 levels, i.e.: no fertilizing and no pesticide treated plant (control 1), fertilizing by 20 t/ha goat manure and spraying chemical pesticide plant (control 2) and fertilizing by 20 t/ha and spraying of Siam Weed biopesticide  2 %. Control 2 and 3 were given 50 kg/ha Urea, 100 kg/ha TSP and 100 kg/ha KCl.
The result of experiment show that 30 t/ha Siam Weed compost application gave higher yield (1.53 t/ha), but was not significantly different with 10 and 20 t/ha. The spraying of biopesticide was not significantly different on the growth and yield of black soybean. Interaction of both factors was significantly different on stem diameter, plant heigh and leaf area age 7 weeks after planting.
Key words: black soybean, organic fertilizer, biopesticide, and siam weedv
Penulis: Dody Kastono
Kode Jurnal: jppertaniandd050005

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Jp Pertanian dd 2005