Date
2022-08-23Subject
580 Plants; biology 630 Agriculture NicaraguaErdnussanbauMonokulturBodenfruchtbarkeitAndosolBiomasseAluminiumoxideHumusBodenanalyseMetadata
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Peanut monoculture-induced decline in fertility of Andosols in Nicaragua
Abstract
Background: Andosols are generally characterized by strong resilience to degradation and high soil fertility. This may decline during long-term peanut (Arachis hypogea) monoculture, as indicated by soil chemical and biological properties. Aims: The study investigated the monoculture-induced changes in soil chemical environment as driver for the decline in soil fertility. Methods: In this on-farm study, soils from seven sites cropped with peanut monoculture for different periods between 1 and 20 years were analyzed for soil chemical properties (pH, Al and Fe oxides, soil organic matter) as well as soil microbial biomass and microbial functional diversity, estimated by multiple substrate-induced respiration (MSIR).
Results: Total nitrogen (N), soil organic carbon (SOC), and microbial biomass C (MBC) declined by 57%, 62%, and 73%, respectively, over 20 years of peanut monoculture in comparison with 1 year peanut cultivation. The SOC/total N ratio showed the most consistent decrease during this period. The Shannon diversity index, calculated from the MSIR responses, generally decreased from 2.5 to 2.1 during peanut monoculture, passing a minimum after 10 years. Discriminant function 1 declined with increasing years of peanut monoculture (r = –0.87) and explained 74% of the variance, separating nearly all peanut sites from each other. The main predictors were soil pH, exchangeable Al³+, and the SOC/total N ratio, but dithionite extractable Al and Fe as well the ratio of exchangeable Ca²+/Mg²+ also made significant contributions.
Conclusion: Twenty years of peanut monoculture led to a strong decline in soil fertility, as strongly indicated by soil microbiological indices.
Results: Total nitrogen (N), soil organic carbon (SOC), and microbial biomass C (MBC) declined by 57%, 62%, and 73%, respectively, over 20 years of peanut monoculture in comparison with 1 year peanut cultivation. The SOC/total N ratio showed the most consistent decrease during this period. The Shannon diversity index, calculated from the MSIR responses, generally decreased from 2.5 to 2.1 during peanut monoculture, passing a minimum after 10 years. Discriminant function 1 declined with increasing years of peanut monoculture (r = –0.87) and explained 74% of the variance, separating nearly all peanut sites from each other. The main predictors were soil pH, exchangeable Al³+, and the SOC/total N ratio, but dithionite extractable Al and Fe as well the ratio of exchangeable Ca²+/Mg²+ also made significant contributions.
Conclusion: Twenty years of peanut monoculture led to a strong decline in soil fertility, as strongly indicated by soil microbiological indices.
Citation
In: Journal of Plant Nutrition and Soil Science Volume 185 / Issue 5 (2022-08-23) , S. 677-684 ; eissn:1522-2624Citation
@article{doi:10.17170/kobra-202210247023,
author={Castillo, Xiomara and Materna, Juliane and Jannoura, Ramia and Jörgensen, Rainer Georg},
title={Peanut monoculture-induced decline in fertility of Andosols in Nicaragua},
journal={Journal of Plant Nutrition and Soil Science},
year={2022}
}
0500 Oax 0501 Text $btxt$2rdacontent 0502 Computermedien $bc$2rdacarrier 1100 2022$n2022 1500 1/eng 2050 ##0##http://hdl.handle.net/123456789/14212 3000 Castillo, Xiomara 3010 Materna, Juliane 3010 Jannoura, Ramia 3010 Jörgensen, Rainer Georg 4000 Peanut monoculture-induced decline in fertility of Andosols in Nicaragua / Castillo, Xiomara 4030 4060 Online-Ressource 4085 ##0##=u http://nbn-resolving.de/http://hdl.handle.net/123456789/14212=x R 4204 \$dAufsatz 4170 5550 {{Nicaragua}} 5550 {{Erdnussanbau}} 5550 {{Monokultur}} 5550 {{Bodenfruchtbarkeit}} 5550 {{Andosol}} 5550 {{Biomasse}} 5550 {{Aluminiumoxide}} 5550 {{Humus}} 5550 {{Bodenanalyse}} 7136 ##0##http://hdl.handle.net/123456789/14212
2022-10-24T12:48:54Z 2022-10-24T12:48:54Z 2022-08-23 doi:10.17170/kobra-202210247023 http://hdl.handle.net/123456789/14212 eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ Al and Fe oxides andosols microbial biomass peanut respiratory response soil organic matter 580 630 Peanut monoculture-induced decline in fertility of Andosols in Nicaragua Aufsatz Background: Andosols are generally characterized by strong resilience to degradation and high soil fertility. This may decline during long-term peanut (Arachis hypogea) monoculture, as indicated by soil chemical and biological properties. Aims: The study investigated the monoculture-induced changes in soil chemical environment as driver for the decline in soil fertility. Methods: In this on-farm study, soils from seven sites cropped with peanut monoculture for different periods between 1 and 20 years were analyzed for soil chemical properties (pH, Al and Fe oxides, soil organic matter) as well as soil microbial biomass and microbial functional diversity, estimated by multiple substrate-induced respiration (MSIR). Results: Total nitrogen (N), soil organic carbon (SOC), and microbial biomass C (MBC) declined by 57%, 62%, and 73%, respectively, over 20 years of peanut monoculture in comparison with 1 year peanut cultivation. The SOC/total N ratio showed the most consistent decrease during this period. The Shannon diversity index, calculated from the MSIR responses, generally decreased from 2.5 to 2.1 during peanut monoculture, passing a minimum after 10 years. Discriminant function 1 declined with increasing years of peanut monoculture (r = –0.87) and explained 74% of the variance, separating nearly all peanut sites from each other. The main predictors were soil pH, exchangeable Al³+, and the SOC/total N ratio, but dithionite extractable Al and Fe as well the ratio of exchangeable Ca²+/Mg²+ also made significant contributions. Conclusion: Twenty years of peanut monoculture led to a strong decline in soil fertility, as strongly indicated by soil microbiological indices. open access Castillo, Xiomara Materna, Juliane Jannoura, Ramia Jörgensen, Rainer Georg doi:10.1002/jpln.202200112 Nicaragua Erdnussanbau Monokultur Bodenfruchtbarkeit Andosol Biomasse Aluminiumoxide Humus Bodenanalyse publishedVersion eissn:1522-2624 Issue 5 Journal of Plant Nutrition and Soil Science 677-684 Volume 185 false
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