| dc.description.abstract | This study aimed to determine the effect of application biochar organic fertilizer
in the form of pellets, a combination of empty bunches of oil palm biochar, azolla
and chicken manure to reduce the use of chemical fertilizer on the growth of
maize plants (Zea mays L.) and chemical properties on ultisol soil. This research
was conducted at the Greenhouse, Research and Technology Laboratory, Faculty
of Agriculture, University of North Sumatra and the Socfin Indonesia Analytical
Laboratory (SOCFINDO) from February 2023 to August 2023. This study used a
Non-Factorial Randomized Block Design with 7 treatments and 3 replications.
Treatment factors included: POB 0 (control without POB, full dose of chemical
fertilizer), POB 1 (50 g POB, ½ CF dose), POB 2 (100 g POB, ½ CF dose), POB
3 (150 g POB, ¼ CF dose ), POB 4 (200 g, ¼ CF dose), POB 5 (250 g POB,
without CF), POB 6 (300 g POB, without CF). Parameters observed were soil
pH, organic C, available P, total N, plant height, shoot dry weight, N content, P
content, N and P absorption. The research result showed that the application of
biochar organic fertilizer at different doses had an effect significantly on soil pH,
organic C, available P, shoot dry weight, N content, N and P absorption of corn
plants in Ultisol soil except on total N and P levels. The application of biochar
organic fertilizer at a dose of 200 g and ¼ of N,P,K dose was better than other
biochar organic fertilizer doses in increasing soil-total N, plant height, shoot dry
weight, N content, N and P absorption of corn plants on Ultisol soil. | en_US |
