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. 2018 Feb 17;15(2):358.
doi: 10.3390/ijerph15020358.

Exploration of Rice Husk Compost as an Alternate Organic Manure to Enhance the Productivity of Blackgram in Typic Haplustalf and Typic Rhodustalf

Subramanium Thiyageshwari  1 , Pandurangan Gayathri  2 , Ramasamy Krishnamoorthy  3 , Rangasamy Anandham  4 , Diby Paul  5
Affiliations

Exploration of Rice Husk Compost as an Alternate Organic Manure to Enhance the Productivity of Blackgram in Typic Haplustalf and Typic Rhodustalf

Subramanium Thiyageshwari et al. Int J Environ Res Public Health. .

Abstract

The present study was aimed at using cellulolytic bacterium Enhydrobacter and fungi Aspergillus sp. for preparing compost from rice husk (RH). Further, the prepared compost was tested for their effect on blackgram growth promotion along with different levels of recommended dose of fertilizer (RDF) in black soil (typic Haplustalf) and red soil (typic Rhodustalf) soil. The results revealed that, inoculation with lignocellulolytic fungus (LCF) Aspergillus sp. @ 2% was considered as the most efficient method of composting within a short period. Characterization of composted rice husk (CRH) was examined through scanning electron microscope (SEM) for identifying significant structural changes. At the end of composting, N, P and K content increased with decrease in CO2 evolution, C:N and C:P ratios. In comparison to inorganic fertilization, an increase in grain yield of 16% in typic Haplustalf and 17% in typic Rhodustalf soil over 100% RDF was obtained from the integrated application of CRH@ 5 t ha-1 with 50% RDF and biofertilizers. The crude protein content was maximum with the combined application of CRH, 50% RDF and biofertilizers of 20% and 21% in typic Haplustalf and typic Rhodustalf soils, respectively. Nutrient rich CRH has proved its efficiency on crop growth and soil fertility.

Keywords: blackgram; cellulolytic microorganisms; compost; microbial consortium; rice husk.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Raw rice husk and the degradation stage of rice husk due to inoculation of lignocellulolytic microorganisms. SEM image of raw rice husk with two different magnifications (A,B); composted rice husk (C,D) with two different magnifications.
Figure 2
Figure 2
Effect of composted rice husk (CRH) on nitrogen, phosphorus, potassium uptake (kg ha−1) by grain and halum of blackgram in Typic Haplustalf. * indicates significant different from other treatment.
Figure 3
Figure 3
Effect of composted rice husk (CRH) on nitrogen, phosphorus, potassium uptake (kg ha−1) by grain and halum of blackgram in Typic Rhodustalf. * indicates significant different from other treatment.
See this image and copyright information in PMC

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