RESPON PERTUMBUHAN DAN PRODUKSI TANAMAN KEDELAI (Glycine max L.) TERHADAP PEMBERIAN DOSIS PUPUK N DAN PUPUK KANDANG SAPI

Abstract

Soybean (Glycine max L) is a potential agricultural commodity to be developed in Indonesia. Soybeans have a high protein content which is beneficial for health. Nitrogen fertilizers and cow manure are often used to increase crop production. The purpose of the study was to determine the effect of the dose of N fertilizer and cow manure on the growth and production of soybean (Glycine max L.). The research was conducted at the Regional Technical Service Unit (UPTD) of Palawija Seeds, Tanjung Selamat Jalan Pendidikan, Medan Sunggal, Deli Serdang, North Sumatra with an altitude of ± 30 meters above sea level (m asl). The study was conducted using a factorial randomized block design (RAK) which consisted of 2 treatment factors, namely: The first factor was N fertilizer consisting of 4 concentration levels, namely: P0 = Control, P1 = N fertilizer dose 15 gr/plot (150 kg/ha) , P2 = Dosage of N fertilizer 30 gr/plot (300 kg/ha), P3 = Dose of N fertilizer 45 gr/plot (450 kg/ha). The second factor is cow manure (K) with 3 dose levels, namely: K1 = 1 kg/plot (10 tons/ha), K2 = 1.5 kg/plot (15 tons/ha), K3 = 2 kg/plot (20 tons/ha). The results showed that fertilizer N had a significant effect on plant height, number of empty pods per sample, number of filled pods per sample, seed weight per sample, seed weight per plot and weight of 100 seeds but had no significant effect on flowering age. Cow manure had a significant effect on the number of empty pods per sample, seed weight per sample and seed weight per plot but had no significant effect on plant height, flowering age, number of filled pods per sample and weight of 100 seeds. The interaction of N fertilizer and cow manure had no significant effect on plant height, flowering age, number of empty pods per sample, number of filled pods per sample, seed weight per sample, seed weight per plot and weight of 100 seeds.