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Carbon mineralization in soil as influenced by crop residue type and placement in an Alfisols of Northwest India.


ABSTRACT: Carbon (C) mineralization of crop residues is an important process occurring in soil which is helpful in predicting CO2 emission to the atmosphere and nutrient availability to plants. A laboratory experiment was conducted in which C mineralization of residues of rice (Oryza sativa), wheat (Triticum aestivum), maize (Zea mays), mungbean (Vigna radiata) and their mixtures was applied to the soil surface or incorporated into an Alfisols from Northwest India. C mineralization was significantly affected by residue placement and type and their interactions. Rice residue had a higher decomposition rate (k?=?0.121 and 0.076?day-1) than wheat (0.073 and 0.042?day-1) and maize residues (0.041?day-1) irrespective of placements. Higher decomposition rates of rice and wheat were observed when placed on soil surface than incorporated in the soils. Additive effects of the contribution of each residue type to C mineralization of the residue mixture were observed. When mungbean residue was added to the rice/wheat or maize/wheat mixture, decomposition of the residue mixture was enhanced. Crop residues with low N and high C/N ratio such as maize, wheat, rice and their mixtures can be applied on the soil surface for faster C and N mineralization, thereby helping to manage high volumes of residues under conservation agriculture-based practices in northwest India.

SUBMITTER: Datta A 

PROVIDER: S-EPMC7077384 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature

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Carbon mineralization in soil as influenced by crop residue type and placement in an <i>Alfisols</i> of Northwest India.

Datta Ashim A   Jat H S HS   Yadav A K AK   Choudhary Madhu M   Sharma P C PC   Rai Munmun M   Singh Love Kumar LK   Majumder S P SP   Choudhary Vishu V   Jat M L ML  

Carbon management 20190201 1


Carbon (C) mineralization of crop residues is an important process occurring in soil which is helpful in predicting CO<sub>2</sub> emission to the atmosphere and nutrient availability to plants. A laboratory experiment was conducted in which C mineralization of residues of rice (<i>Oryza sativa</i>), wheat (<i>Triticum aestivum</i>), maize (<i>Zea mays</i>), mungbean (<i>Vigna radiata</i>) and their mixtures was applied to the soil surface or incorporated into an Alfisols from Northwest India. C  ...[more]

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