The Effect of Organomineral on pH, Nitrogen Content, Organic-C Content and Yield of Upland Rice (Oryza sativa L.) on Inceptisols, West Java Indonesia

Abstract

Generally, Inceptisols has low to moderate fertility characteristics. This condition can make a problem on the development of upland rice production caused by poor soil quality. Upland rice is one of the cultivated plants that is cultivated on dry land. This research was aimed to find the perfect combination of organomineral including humic acid, zeolite, natural phosphate, and dolomite on soil and yield of upland rice in Inceptisols. This research was conducted at Ciparanje, Faculty of Agriculture, Universitas Padjadjaran from July 2017 to February 2018. This experiment applied a Randomize Block Design (RBD) consisted of 10 treatments and three repetitions with the combination of humic acid (6; 8; 10 kg/ha); zeolite (150; 200; 250 kg/ha); dolomite (100; 150; 200 kg/ha) and natural phosphate (250; 300; 350 kg/ha). The result of this experiment showed that there was a significant effect of the organomineral on pH, Organic-C and yield of upland rice but no for total N. However the combination of humic acid 10 kg / ha + zeolite 150 kg / ha + dolomite 100 kg / ha + raw phosphate 250 kg / ha is the best doses compared to other combinations.