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Phosphorus Adsorption and Desorption as affected by Long-Term Fertilization under Rice-Rice Cropping System in an Acidic Inceptisol

Indian Agricultural Research Journals

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Title Phosphorus Adsorption and Desorption as affected by Long-Term Fertilization under Rice-Rice Cropping System in an Acidic Inceptisol
 
Creator Kingshuk Modak
Dipak Ranjan Biswas
Ranjan Bhattacharyya
Pragati Pramanick Maity
Tapas Kumar Das
Biraj Bandhu Basak
Mitali Mandal
Bhupinder Singh
 
Subject Phosphorus adsorption
P desorption
Inceptisol
Langmuir
Freundlich isotherm
 
Description Phosphorus (P) underpins global food security by ensuring soil fertility and sustainable crop production. Phosphorus adsorption-desorption under long-term nutrient management practices can shed light on availability and environmental fate of P. Our aim was to study the effect of super-optimal dose of P fertilization, liming and manuring on soil properties and its adsorption-desorption behavior in acidic Inceptisol under rice-rice cropping system. In this investigation, soil samples from selected seven treatments from a long-term (14 years) experiment viz., control, 100% of recommended dose of nitrogen (N), N and phosphorus (NP), N, P and potassium (NPK), 150% NPK, NPK+farmyard manure (NPK+FYM) and NPK+Lime were used to study the adsorption and desorption characteristics. The results revealed that P fertilization along with manuring or liming improved available P. The adsorption and desorption data was well fitted in Langmuir and Freundlich equation, respectively. The adsorption maxima ‘a’ decreased in NPK+FYM (324 mg kg-1), 150% NPK (341 mg kg-1) and NPK+Lime (352 mg kg-1) treated plots compared to NPK treated plots (403 mg kg-1) in surface soil. Moreover, the decrease in adsorption maxima and bonding energy coefficient due to manuring or liming with NPK suggest improved release of P. In P desorption study, NPK+FYM treated plots showed highest cumulative P desorption of 38.4% and 31.1% at 0-15 cm and 15-30 cm soil layers, respectively. Thus, long-term application of NPK+FYM can result in saturation of P adsorption sites and cause potential leaching loss of P and eutrophication in light textured acid soil. However, formation of insoluble P compound cannot be overlooked.
 
Publisher Indian Society of Soil Science
 
Date 2024-06-03
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier https://epubs.icar.org.in/index.php/JISSS/article/view/152355
 
Source Journal of the Indian Society of Soil Science; Vol. 72 No. 1 (2024): Journal of the Indian Society of Soil Science; 56-65
0974-0228
0019-638X
 
Language eng
 
Relation https://epubs.icar.org.in/index.php/JISSS/article/view/152355/54709