PENGARUH AMELIORAN ORGANIK TERHADAP BEBERAPA SIFAT KIMIA TANAH ULTISOL DAN PERTUMBUHAN TANAMAN JAGUNG

Abstrak

Ultisol soil is a with soil pH, low organic matter and has very low P availability. This study aims to determine the effect of organic ameliorant on several chemical properties of Ultisol soil, and the growth of corn on Ultisol soil and to determine the effect of organic ameliorant dose on Ultisol soil and corn plant growth. This research was carried out from December 2021 to February 2022 at the Field Laboratory II, Faculty of Agriculture, Halu Oleo University. The study used a Randomized Block Design (RBD) consisting of 5 treatments, each treatment was repeated 4 times, namely control (B0), rice husk charcoal 225 g polybags equivalent to 30 tons ha (B1), cow dung 225 g polybags 30 tons ha (B2), Rice husk charcoal+cow dung 225 (112,5+112,5) g polybags equivalent to 30 tons ha (B3), Rice husk charcoal+cow dung 450 (225+225) g polybags equivalent to 60 tons ha. The results showed that the use of organic ameliorant as a whole gave changes to the increase in soil pH, C-organic and P-available. Soil pH increased from 4.38 to 6.32, C-organic increased from 0.69% to 2.41% and P-available increased from 12.01 ppm to 47.47 ppm. The application of organic ameliorant had an effect on the growth of corn plants, namely the highest average plant height and the average number of leaves. Keywords: Organic Ameliorant, Corn Plants, and Ultisol Soil