Composting rice straw using earthworm (Eudrilus eugeniae) or fungal inoculant (Trichoderma viridae) and its utilization in rice (Oryza sativa)groundnut (Arachis hypogaea) cropping system

S.K. SARANGI; T.D. LAMA

doi:10.59797/ija.v58i2.4186

Authors

S.K. SARANGI
T.D. LAMA

DOI:

https://doi.org/10.59797/ija.v58i2.4186

Keywords:

Compost, Earthworm, Fungal inoculant, Groundnut, Lime, Paddy straw, Rice

Abstract

An experiment was conducted at ICAR Research Complex for North Eastern Hill (NEH) Region, Meghalaya during 2007-09 on composting of paddy straw and its effect on rice (Oryza sativa L.)-groundnut (Arachis hypogaea L.) cropping system. The composting experiment started during first week of February consisted of eight treat- ments (i) Earthworm (Eudrilus eugeniae), (ii) Earthworm + 2.5% lime, (iii) Earthworm + 5.0% lime, (iv) Earthworm + 7.5% lime, (v) Trichoderma viridae, (vi) T. viridae + 2.5% lime, (vii) T. viridae + 5.0% lime, (viii) T. viridae + 7.5% lime. The composting was faster by 67 days and multiplication of earthworm was 22 times higher in the treatment with earthworm + 5.0% lime. Lime application @ 5% of dry weight of composting substrate increased pH of the compost from 6.24 to 7.09 and nitrogen content from 1.69 to 1.91%. The field experiment consisted of 11 treat- ments viz., eight composts produced from composting experiment @ 6 t/ha, farmyard manure (FYM) @ 6 t/ha, recommended dose of fertilizer (80-26.2-33.3 kg N-P-K/ha) and control. There was an increase in soil moisture in 0-15 cm layer by 3.06%, pH from 4.9 to 6.0 and soil organic carbon by 0.39% due to application vermicompost. Application of vermicompost prepared with 5.0% of lime increased the soil microbial biomass by 147% over con- trol and the same was increased by 51% due to application of T. viridae compost prepared with 2.5% lime. The grain and pod yields of upland rice and groundnut increased by 120% and 107% respectively over control due to application of vermicompost prepared with 5.0% lime @ 6.0 t/ha in rice crop.

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