CHARACTERIZATION OF BIOCHAR, NUTRIENT RELEASE AND ITS EFFECT ON GROWTH AND YIELD OF AEROBIC RICE
Loading...
Files
Date
2015-10-10
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
An experiment was conducted to characterize biochar, nutrient release and its
effect on growth and yield of aerobic rice at UAS, GKVK, Bengaluru in 2014. Three
different biochars viz., wood (WB), bamboo (BB) and rice husk biochar (RHB) and four
levels of application (2, 4, 8 and 16 t ha-1) were the treatments. An incubation study was
conducted to know the nutrient and Si release from different biochars in acidic, neutral
and alkaline soil at field capacity moisture regime. Among different sources, application
of WB recorded higher pH and exchangeable bases while RHB recorded higher available
P2O5 and 0.01 M CaCl2 - Si in all soils. Independent of biochar type, increased rate of
application increased the pH, available P2O5, exchangeable bases and 0.01 M CaCl2 - Si
content of soils. Significant decrease in DTPA extractable Fe and Mn were observed with
application of WB in acidic and neutral soil while with RHB in alkaline soil. In a pot
culture study, significantly higher yield of straw and grain were recorded with the
application of RHB @ 8 and 4 t ha-1 in acidic and neutral soil, respectively while WB @
4 t ha-1 in alkaline soil. Si and other nutrients content in straw and grain increased with
application rates of biochar. With the application of different sources and levels of
biochar in different soils, yield responses of straw and grain ranged from -36.56 to 55.18
per cent and -51.00 to 46.47 per cent respectively.
Description
Keywords
null