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Influence of soil fertility management technologies on phosphorus fractions, sorption characteristics, and use efficiency in humic Nitisols of Upper Eastern Kenya

Otieno, Erick O.; Lenga, Florence K.; Mburu, David M.; Kiboi, Milka N.; Fliessbach, Andreas and Ngetich, Felix (2023) Influence of soil fertility management technologies on phosphorus fractions, sorption characteristics, and use efficiency in humic Nitisols of Upper Eastern Kenya. Heliyon, 9 (12), pp. 1-14.

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Document available online at: https://www.sciencedirect.com/science/article/pii/S2405844023100673


Summary

Fractions of phosphorus (P) and its sorption characteristics are affected by different soil fertility (FM) technologies which ultimately affect crop growth and productivity. However, the response of P fractions and sorption characteristics to soil fertility technologies that integrate diverse amendments is still poorly understood in acidic Nitisols. A randomized complete block design was layout in an acidic Nitisol to determine fractions of P, its sorption characteristics and use efficiencies in acidic Nitisols under various FM technologies in field conditions. The use of minimum tillage + maize residue + inorganic fertilizer + goat manure (MTCrGF) had the highest impact on and significantly increased resin-Pi, NaHCO3-Pi, and maximum P sorption (Smax) by 182, 76, and 52 mg P kg−1. Moreover, NaOH-Pi and Smax concentrations were higher under conventional tillage + maize residue + inorganic fertilizer + goat manure (CTCrGF) by 216 mg P kg−1 and 49 mg P kg−1 than the control. MTCrGF and CTCrGF also had the lowest P bonding energy (0.04 L mg−1). CTCrGF had the highest P partial productivity factor (0.093 and 0.140 kg biomass kg−1 P) and P agronomic efficiency (0.080 and 0.073 kg biomass kg−1 P) during the two cropping seasons. The results demonstrate the positive influence of combining multiple P sources on soil P fractions, sorption characteristics, and use efficiencies. Notably, combining either conventional or minimum tillage with maize straw and applying integrated manure and inorganic fertilizer (MTCrGF or CTCrGF) can increase the labile P concentrations and reduce the potential depletion of the non-renewable rock phosphate and the use of inorganic phosphatic fertilizers for agricultural production.


EPrint Type:Journal paper
Keywords:Fractionation, Inorganic fertilizer, Langmuir equation, Organic amendments, Abacus, FiBL10119, Orm4Soil
Agrovoc keywords:
Language
Value
URI
English
fractionation
http://aims.fao.org/aos/agrovoc/c_3074
English
inorganic fertilizers
http://aims.fao.org/aos/agrovoc/c_27870
English
organic amendments
http://aims.fao.org/aos/agrovoc/c_12965
Subjects: Soil > Soil quality
"Organics" in general > Countries and regions > Africa
Research affiliation: Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > International > Agriculture in the Tropics and Subtropics
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Soil > Soil fertility
DOI:10.1016/j.heliyon.2023.e22859
Deposited By: Forschungsinstitut für biologischen Landbau, FiBL
ID Code:52144
Deposited On:11 Dec 2023 13:20
Last Modified:11 Dec 2023 13:20
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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