Effects of Organic and Inorganic Applications on Soil Bacterial and Fungal Microbial Communities Diversity and Impacts of Earthworms on Microbial Diversity in the Kabete Long-Term Trial, Kenya

Kamaa, Mary M.; Mburu, Harrison N.; Blanchart, Éric; Chibole, Livingstone; Chotte, Jean‐Luc; Kibunja, C.N.; Lesueur, Didier

doi:10.1007/978-94-007-2938-4_7

Cited by 5 publications

(5 citation statements)

References 26 publications

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“…Straw is rich in organic matter and nutrients, which could not only improve soil fertility but also provide a place for soil organisms to attach (Delcher, Bratke, Powers, & Salzberg, 2007). According to Kamaa et al (2012), the incorporation of crop straw into the soil has great significance for soil microbial species and soil enzymes. Further, it was shown that the improvement of soil microbial abundance after returning rice straw to the field was better than after treating the fireld with biochar (Li, Li, Zou, & Wu, 2015).…”

Section: Discussionmentioning

confidence: 99%

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Effects of different rice straw on soil microbial community structure

et al. 2021

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Straw incorporation is an important measure to improve soil fertility and soil acidification. However, fresh straw that is returned to the field cannot be decomposed in a short time. Accumulation of undecomposed straw in the soil changes humus composition and the C structure. An experiment was designed to evaluate the effects of decomposed straw on soil fertility and microbial communities. Soil samples were collected from a rice-rice-tobacco region in southwestern China (The rice was Hongyou No 7, which was a new variety applied in 2007 by the Honghe State Agricultural Science Institute,Yunnan province, China). (The tobacco was K326. K326 was an excellent variety which Imported from Northup King Seed Company (USA) to China in 1985). The soil was mixed with different kinds of straw and incubated in a greenhouse. The responses of the soil fertility, microbial diversity, and microbial population were analyzed after 0, 16, and 33 d of incubation. Overall, we found that (a) the soil organic matter and the organic C content of each humus component were significantly increased after 33 d of incubation. In addition, the condensation and oxidation degrees of the soil C structure were decreased. (b) Community dynamics changes in the soil were accompanied by changes of incubation times. (c) Decomposed straw incorporation could stimulate potentially beneficial microbial populations. (d) Decomposed straw incorporation with microbial agent application could be the best practice for the application of biofertilizers.

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Section: Discussionmentioning

confidence: 99%

“…According to Kamaa et al. (2012), the incorporation of crop straw into the soil has great significance for soil microbial species and soil enzymes. Further, it was shown that the improvement of soil microbial abundance after returning rice straw to the field was better than after treating the fireld with biochar (Li, Li, Zou, & Wu, 2015).…”

Section: Discussionmentioning

confidence: 99%

Effects of different rice straw on soil microbial community structure

et al. 2021

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“…A similar result was observed in a silty‐clay loam in Australia, wherein applying large quantities of N fertilizer resulted in the high relative abundance of Ascomycota (Paungfoo‐Lonhienne et al ., ). The overall diversity of soil fungal communities decreased on amendment with chemical fertilizers (Allison et al ., ; Beauregard et al ., ; Kamaa et al ., ). Like chemical fertilizers, the application of organic matter can also impact soil fungal communities, with their application frequently causing increased soil fungal diversity (Cwalina‐Ambroziak and Bowszys, ; Kamaa et al ., ; Song et al ., ).…”

Section: Introductionmentioning

confidence: 99%

“…The overall diversity of soil fungal communities decreased on amendment with chemical fertilizers (Allison et al, 2007;Beauregard et al, 2010;Kamaa et al, 2012). Like chemical fertilizers, the application of organic matter can also impact soil fungal communities, with their application frequently causing increased soil fungal diversity (Cwalina-Ambroziak and Bowszys, 2009;Kamaa et al, 2012;Song et al, 2015). These changes to soil fungal communities are associated with the alteration of soil nutrients and plant carbon inputs (Allison et al, 2007;Song et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Fungal community composition in soils subjected to long‐term chemical fertilization is most influenced by the type of organic matter

Sun

Dsouza

Gilbert

et al. 2016

Environmental Microbiology

217

113

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Organic matter application is a widely used practice to increase soil carbon content and maintain soil fertility. However, little is known about the effect of different types of organic matter, or the input of exogenous species from these materials, on soil fungal communities. In this study, fungal community composition was characterized from soils amended with three types of organic matter over a 30-year fertilization experiment. Chemical fertilization significantly changed soil fungal community composition and structure, which was exacerbated by the addition of organic matter, with the direction of change influenced by the type of organic matter used. The addition of organic matter significantly increased soil fungal richness, with the greatest richness achieved in soils amended with pig manure. Importantly, following addition of cow and pig manure, fungal taxa associated with these materials could be found in the soil, suggesting that these exogenous species can augment soil fungal composition. Moreover, the addition of organic matter decreased the relative abundance of potential pathogenic fungi. Overall, these results indicate that organic matter addition influences the composition and structure of soil fungal communities in predictable ways.

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“…Other results have indicated that incorporating organic amendments and practicing minimum tillage increase the relative diversity of fungal populations and bacterial species richness (Rames et al, 2013), which is why the recommendation for crops produced inside the Nevados NNP is to transition to using Páramo substrates as a source of nutrients to imitate the natural cycles of conserved Páramo soils. Organic conditioners stimulate a variety of organisms as a result of carbon and other nutrient inputs (Chaudhry et al, 2012;Rames et al, 2013), and there is evidence that the application of organic resources over a long period produces positive effects on the fungal and bacterial communities in Kenyan soils (Kamaa et al, 2012). Increased microbial diversity and organic crop performance have also been observed under conventional treatments (Girvan et al, 2004;Melero et al, 2006;Sharma et al, 2010), so the richness and diversity of microbial communities in soils treated with manure may be improved, which would positively correlate with soil productivity (Parham et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

Potato cultivation and livestock effects on microorganism functional groups in soils from the neotropical high Andean Páramo

Avellaneda-Torres¹,

Sicard²,

Guerra‐Castro³

et al. 2020

Revista Brasileira De Ciência Do Solo

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Páramo ecosystems are of great importance because they are considered hotspots within the Tropical Andes. They are also very important for their role as producers and regulators of water processes in the Neotropic. However, the human occupation of the Colombian Páramos has generated conflict between environmental benefits and productive land uses, specifically the potato cultivation and livestock. To assess possible changes associated with potato cultivation (Solanum tuberosum L.) and livestock on the microbial communities of Páramo soils, the objective of this research was to evaluate the possible effects of potato cultivation and livestock farming on the soil microorganisms associated with different functional groups (nitrogen fixers, phosphate solubilizers and cellulolytic) in the Páramo of Nevados National Natural Park (Nevados NNP), Colombia. Samples were collected from soils under potato cultivation, livestock, and Páramo conservation areas over two climatic seasons (rainy and dry) in three farms at different elevations (3769, 3590, and 3432 m a.s.l.). The microorganisms were isolated using selective culture media for each functional group and identified using molecular markers; microbial diversity was analyzed using multivariate statistical tools. Changes were dependent on land use, elevation, and climate and were statistically significant in the rainy season on all three farms and one of the farms during the dry season. Similarly, the results indicated that climate has a greater impact on the evaluated microbial communities than land use does; the changes were significantly different between the soil under potato cultivation and in conserved Páramo sites at most of the evaluated locations and between soil subjected to livestock farming and Páramo in certain locations. However, the differences between potato cultivation and livestock farming were smaller. This study showed for the first time that the microbial structure (abundance and composition) of microorganism functional groups was different as a result of potato cultivation and livestock farming on Páramo soils, although these changes were dependent on farm elevation and climate.

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Effects of Organic and Inorganic Applications on Soil Bacterial and Fungal Microbial Communities Diversity and Impacts of Earthworms on Microbial Diversity in the Kabete Long-Term Trial, Kenya

Cited by 5 publications

References 26 publications

Effects of different rice straw on soil microbial community structure

Effects of different rice straw on soil microbial community structure

Fungal community composition in soils subjected to long‐term chemical fertilization is most influenced by the type of organic matter

Potato cultivation and livestock effects on microorganism functional groups in soils from the neotropical high Andean Páramo

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