Different composting methods in bio recycling paddy straw to nutrient rich manure: A comparative analysis

Amala Mary George, Sudha B., Jacob John, Sajeena A.


An experiment on bio recycling of paddy straw to quality organic manure was conducted at the Integrated Farming System Research Station (IFSRS), Kerala Agricultural University, Karamana, Thiruvananthapuram during March to August 2018. The study aimed at standardizing an ideal technology for composting paddy straw, especially for the benefit of farmers practicing integrated farming. The experiment was laid out in Completely Randomized Design with eight treatments and three replications. Three different composting techniques viz., vermicomposting, co-composting with nitrogen-rich organic manures, and microbial composting were evaluated in the study. Time taken for maturation of composts, recovery of composts, different chemical properties including nutrient status of mature composts and microbial and enzymatic status of final composts were recorded. Co-composting performed better in comparison to vermicomposting and microbial composting methods in bio recycling paddy straw to quality manure. Among different cocomposting treatments, paddy straw co-composted with cowdung and poultry manure in the ratio 8:1:1 (on volume basis) produced mature compost within the shortest period of 97 days. In terms of recovery, paddy straw co-composted with poultry manure in the ratio 4:1 performed better with the highest recovery of 45 per cent. Chemical properties (CEC and C: N ratio) were improved and status of major plant nutrients was higher and comparable for co-composting of paddy straw with poultry manure (4:1) and co-composting with cow dung and poultry manure in the ratio 8:1:1. These two treatments recorded comparable and higher microbial status as well as activity of dehydrogenase enzyme.


Crop nutrition, soil fertility management

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