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Mineralization of Thippi (Cassava Starch Factory Solid Residue) Compost Under Incubation

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Title Mineralization of Thippi (Cassava Starch Factory Solid Residue) Compost Under Incubation
Not Available
 
Creator S. Chithra, K. Susan John, J. Sreekumar and M. Manikantan Nair
 
Subject Thippi, sago, starch, vermicomposting, environmental pollutant, nutrient release, C: N ratio
 
Description Not Available
Cassava (Manihot esculenta Crantz) is an important tropical tuber crop, the tubers of which are used
both for edible purpose and for industrial uses. In Tamil Nadu, more than 500 cassava based small to
large scale starch and sago producing factories are generating more than 250 tonnes of solid residue
called ‘thippi’ per annum. This is an environmental pollutant affecting soil and human health and was
found very difficult to dispose too. At ICAR-CTCRI, the same was converted to a nutritious organic
manure through different composting methods where comosting resulted in the highest nutrient
increase and the C: N ratio narrowed to 8:1 from 82:1. Experiments conducted in cassava showed its
suitability as a good organic manure alternative to the commonly used organic manures like farm yard
manure, green manuring in situ with cowpea, vermicompost, coir pith compost and crop residue as
well as can substitute for 50% of the NPK requirement as per package of practices (PoP) and secondary
nutrient Mg and micronutrient Zn to a great extent. While using any organic manure, the decomposition
of the same to release the nutrients (mineralization) especially during the critical growth stage of the
crop or as per the nutrient requirement of the crop needs to be understood. Hence, to understand the
nutrient release pattern of thippi compost, a pot study was conducted by incubating the soil mixed
with thippi compost and analysed the soil samples at monthly intervals for pH, organic carbon, electrical
conductivity (EC), available N, P and K, exchangeable Ca, Mg, Fe, Cu, Mn and Zn for one year. The
mean data of the soil chemical properties for one year indicated the pH, EC, available N, P and K,
exchangeable Ca, Mg, available S, Fe, Cu, Mn, Zn and B increased to the tune of 0.64, 0.055 dS m-
1, 99.8, 46.1, 87.2 kg ha-1, 0.73, 0.99 meq 100g-1, 15.8, 9.4, 0.18, 1.07, 3.07 and 0.19 mg kg-
1 which in turn was 13.8 , 35.4, 46, 88.3, 107.5, 68.2, 176.7, 158, 23.5, 16.4, 72.8, 56.7 and
17.9% over the initial status. Among the nine composting options, vermicomposted thippi compost
had the highest nutrient release and the maximum nutrient release was found during 5 to 8th month
of incubation.
Not Available
 
Date 2021-08-06T04:03:18Z
2021-08-06T04:03:18Z
2020-06-01
 
Type Article
 
Identifier Not Available
0378-2409
http://krishi.icar.gov.in/jspui/handle/123456789/53326
 
Language English
 
Relation Not Available;
 
Publisher Indian Society for Root Crops