Diatomite and Rice Husk Biochar as Silicon Source and its Effect on Yield of Wetland Rice
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Authors
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Kollalu Sandhya Nagabovanalli B. Prakash
Keywords:
Diatomite, rice husk biochar, silicon, rice, growth, yieldAbstract
Field experiments were carried out during summer and kharif of 2015 and kharif of 2016 with and without
application of silicon (Si) under rice cropped and non-cropped condition. Diatomite and rice husk biochar
was used as Si source and applied @ 300 kg ha-1 and 2 t ha-1, respectively. The continual application of Si
increased the straw and grain yield consistently compared to control. Straw and grain Si content and its
uptake also increased with application of Si but not significantly differed. Treatment under the cropping
situation recorded higher soil pH. Although, there was no significant difference in electrical conductivity
(EC) among the treatments, post-harvest soils recorded higher values than initial soil. Plant available Si
content in post-harvest soil was significantly higher in control where no crop was grown with or without
added Si. However, in the presence of rice crop, soil Si content decreased and/or was on par with the other
treatments.
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