Peningkatan Produktivitas Padi Gogo pada Lahan Kering Masam Akibat Aplikasi Pembenah Tanah Biochar

No Thumbnail Available
Date
Journal Title
Journal ISSN
Volume Title
Publisher
Pusat Penelitian dan Pengembangan Tanaman Pangan
Abstract
Description
Low grain yield of upland rice on the acid mineral soil is possible to be improved. The main problem of the acid soil is its high soil acidity that inhibits crop growth, causing low productivity. The objective of this study was to evaluate the effects of biochar application on upland rice productivity and on soil properties of acid mineral soil. The study was conducted at Agricultural Research Station of Taman Bogo, East Lampung from July to October 2013 (season 1), December 2013 to April 2014 (season 2), May to August 2014 (season 3) and from October 2014 to February 2015 (season 4). The experimental design was split plots with five replications. The main plots were two types of biochar (cacao shell and rice husk), the sub plots were biochar rates (0; 5 t/ha and 15 t/ha), applied only at the first season. The inorganic fertilizers of 250 kg/ha Urea and 300 kg/ha NPK compound of Phonska were given in each season. The variables measured were plant growth, grain yield and soil properties, namely Bulk Density/BD, soil pH and Al3+content. Results showed that during the four cropping seasons the addition of cocoa shell biochar indicated better responses on rice growth and grain yield as compared to that of rice husk biochar. Rice grain yields ranged from 2.54 to 3.97 t/ha dry grain. Biochar at rate of 5 and 15 t/ha provided a stable yield and increased dry grain around 74-179%. The cocoa shell biochar application showed better response on soil acidity (increased soil pH and reduced Al3+) and soil bulk density as compared to that of rice husk biochar. On the degraded acid soil, upland rice productivity and soil properties can be improved by applying 15 t/ha of cacao shell biochar
Keywords
upland rice; acid mineral soil; biochar; agricultural waste
Citation