KAJIAN NAUNGAN, TARAF PUPUK UREA DAN VARIETAS KEDELAI (Glycine max L.) TERHADAP PERTUMBUHAN DAN PRODUKSI TANAMAN KEDELAI SEBAGAI TANAMAN SELA DI AREAL PERTANAMAN KELAPA SAWIT MENGHASILKAN
Abstract: The aims of this
research was to analyze morpo_physiology changing of soybean under oilpam area;
determine effect of shading and N fertilizer dosage on the growth and yield of
soybean under oilpam area; and determine suitable soybean varieties that enable
grow and produce under oilpalm.The experiment located in Ujung Labuan Village,
Deli Serdang District. The experiment was arranged in Split-split Plot Design 3
x 4 x 3 with 3 replication, with three factors observed: 1) shade level,
consist of: under 4 years old oilpam,
under 6 years old oilpam, open area, 2)
N dosage,: 200 kg urea/ha, 150 kg/ha, 100 kg urea/ha, 0 kg urea/ha, 3) soybean variety: Anjasmoro, Burangrang, and Grobogan. Plant
height, leaf area, plant dry weight, and soybean production were determined.
Result showed there were some significant effects of interaction factors
between oilpalm canopy shading, N dosage and soybean variety on growth and
yield of soybean. The highest growth and production of soybean found at open
area. Between 4 years old oilpam and 6-7 years old oilpam, soybean growth and
production are unsignificant different, and lower than those on opening area. N
dosage make some significat effects on growth and yield of soybean, which is
usually nonsignificant between 150 kg Urea/ha or 200 kg Urea/ha. Meanwhile
soybean variety make some significat effects. At open area, burangrang make the
highest growth and production by application of 200 kg urea/ha, but under oilpalm the highest production
found at Burangrang under 4 years old oilpalm and application of 200 kg
urea/ha, followed by several treatments which
are unsignifican different.
Penulis: Asima napitupulu,
Rosmayati, Luthfi Aziz Mahmud Siregar
Kode Jurnal: jppertaniandd170487
