https://doi.org/10.36873/agp.v20

KAJIAN EROSI, ALIRAN PERMUKAAN DAN KEHILANGAN HARA PADA TANAMAN KELAPA SAWIT DENGAN UMUR YANG BERBEDA Study of Erosion, Runoff and Nutrient Losses from Oil Palm Plantation with Different, Ages Purwanto, E.1), Jaya, A.,*1) Widiastuti, L.,1), Birawa, C.,2), Adji, F. F.,1) dan Anwar, M1)

Abstract

ABSTRACT
Erosion brings more fertile soil layers, rich in organic matter and nutrients causing loss of plant
nutrients. The research aims to study the amount of surface runoff, erosion and nutrient loss in oil
palm plantations of different ages. This research was conducted at PT. Kalimantan Hamparan Sawit,
Gunung Mas Regency, lasted for 4 months from May to August 2018. The method used was
measurement on an erosion plots of 15mx25m size, covering the amount of erosion, surface runoff and
nutrient analysis in the laboratory. The results showed surface runoff on palm oil for 3 years, greater
than palm oil for 5 years for each rainfall events. The surface flow in 3-year palm is 1.90mm and 5-
year palm is 1.50 mm. The average erosion in 3-year palm is 0.07 tons ha-¹, whereas for 5-year palm is
0.05 tons ha-¹. The total N-loss in surface runoff in 3-year palm is 0.0036 kg ha-¹ and 5-year palm is
0.0017 kg ha-¹. P-available at 3-year palm at 0,0005 kg ha-¹, while 5-year palm at an average of
0,0004 kg ha-¹. K loss in 3-year palm is 0.0292 kg ha-¹ and 5-year palm is 0.0108 kg ha-¹. Nutrient
loss in erosion in oil palm for 3 years is greater than oil palm in 5 years. The total N-loss in 3-year
palm is 13.53 kg ha-ha and in 5-year palm is 11.94 kg ha-¹. The 3-year palm oil P is 1.05 kg ha-¹,
while the 5-year palm oil is 0.90 kg ha-¹. K loss in 3 years oil palm was 2.54 kg ha-¹ and 5 years palm
oil was 2.42 kg ha-¹.
Keywords: Runoff, erosion, oil palm, nutrient