Indonesian

Abstract

Kuntyastuti H, Sutrisno. 2017. Response of soybean and peanut to potasium fertilizer residu in Fifth And Sixth planting season against potasium application in First and second planting season. Pros Sem Nas Masy Biodiv Indon 3: 199-204. Potassium is an essential nutrient for plants. Applications nutrient potassium continuously can cause accumulation in soil that it probably still be used for the next planting season. This study aimed to determine the effect of potassium fertilizer application on first planting season (MT-1) and second planting season (MT-2) to macro-nutrients uptake, vegetative growth, and yield of the fifth (MT-5) and sixth planting season (MT-6). The study was conducted in the greenhouse Balitkabi using Mojokerto entisol soils. The experiment was performed on a concrete plot with size for wide 0.5 m, long 0.8 m, and high 0.5 m. Experiments are applied in a factorial completely randomized block design with two factor and three times replications. The first factor is the potassium fertilizer dose (i.e., 0, 200, 400 and 600 kg KCl/ha) that applied on soybean at first planting season MT-1). The second factor is the potassium fertilizer dose (i.e., 0, 50, 100, 200 and 400 kg KCl/ha) that applied on soybean at second planting season (MT-2). The results showed that the potassium fertilizer residual the MT-1 and MT-2 increases the macro nutrients uptake, vegetative growth and crop yields in the fifth and sixth planting season. The MT-1 and MT-2 Fertilizer residual does not give effect together in the second growing season. The MT-1 Fertilizer residual only increase vegetative growth in MT-5, while the MT-2 residual fertilizer increase crop yields in theMT-5 andMT-6.