Long-term effects of mineral fertilizers on soil microorganisms – A review

Geisseler, Daniel; Scow, Kate M.

doi:10.1016/j.soilbio.2014.03.023

Cited by 1,040 publications

(573 citation statements)

References 98 publications

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“…Relieving nutrient limitation favors increased crop biomass production and as a result greater residue additions to soil (Geisseler and Scow 2014;Körschens et al 2013;Ladha et al 2011). This is consistent with greater labile and total soil C, and acid phosphomonoesterase activity under P fertilization relative to no P-fertilization at our site.…”

Section: Benefits Of P Fertilization For Microbial and Enzymatic P Cysupporting

confidence: 84%

Biological P cycling is influenced by the form of P fertilizer in an Oxisol

et al. 2017

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Phosphate rock (PR) is an alternative fertilizer to increase the P content of P-deficient weathered soils. We evaluated the effects of fertilizer form on indicators of biological cycling of P using an on-farm trial on a Rhodic Kandiudox in western Kenya. Treatment plots were sampled after 13 cropping seasons of P applications as Minjingu phosphate rock (PR) or as triple super phosphate (TSP) (50 kg P ha −1 season −1 ), as well as a P-unfertilized control (0 kg P ha −1 season −1 ). Soils (0-15 and 15-30 cm) were analyzed for microbial biomass P (P mic ), activities of acid phosphomonoesterase, alkaline phosphomonoesterase, and phosphodiesterase, and sequentially extractable P fractions. P additions as Minjingu PR yielded 299% greater P mic than TSP at 0-15-cm depth despite similar labile P concentrations in the two P fertilization treatments and stimulated activities of acid phosphomonoesterase (+39%). When added in the soluble form of TSP, a greater percentage of total soil P was present in mineral-bound forms (+33% Fe-and Al-associated P). Higher soil pH under Minjingu PR (pH 5.35) versus TSP (pH 5.02) and the P-unfertilized treatment (pH 4.69) at 0-15-cm depth reflected a liming effect of Minjingu PR. The form of P fertilizer can influence biological P cycling in weathered soils, potentially improving P availability under Minjingu PR relative to TSP via enhanced microbial biomass P and enzymatic drivers of P cycling.

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Section: Benefits Of P Fertilization For Microbial and Enzymatic P Cysupporting

confidence: 84%

Biological P cycling is influenced by the form of P fertilizer in an Oxisol

et al. 2017

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“…This increase in MBC contents is most likely attributable to increases in SOC because of higher crop productivity (Geisseler and Scow, 2014). Similarly in this study, we observed that, relative to the CK, mineral fertilizers generally enhanced the MBC, PLFA, and SOC contents.…”

Section: Effects Of Fertilizer Practices On Soil Absolute Enzyme Actisupporting

confidence: 83%

Responses of absolute and specific soil enzyme activities to long term additions of organic and mineral fertilizer

Zhang

Dong

Dai

et al. 2015

Science of The Total Environment

163

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• Acid phosphatase activity was negatively correlated with soil pH and P content.• βG, NAG, and LAP activities were positively correlated with SOC and Total N contents.• The four enzyme activities were significantly higher under manure than NPK fertilizer.• Enzyme activities were positively correlated with actinomycete and G + bacterium.• We recommend reducing P fertilizer application rates to subtropical paddy soils. G R A P H I C A L A B S T R A C Ta b s t r a c t a r t i c l e i n f o Long-term phosphorus (P) and nitrogen (N) applications may seriously affect soil microbial activity. A long-term field fertilizer application trial was established on reddish paddy soils in the subtropical region of southern China in 1998. We assessed the effects of swine manure and seven different rates or ratios of NPK fertilizer treatments on (1) the absolute and specific enzyme activities per unit of soil organic carbon (SOC) or microbial biomass carbon (MBC) involved in C, N, and P transformations and (2) their relationships with soil environmental factors and soil microbial community structures. The results showed that manure applications led to increases in the absolute and specific activities of soil β-1,4-glucosidase(βG), β-1,4-N-acetylglucosaminidase (NAG), and leucine aminopeptidase (LAP). The absolute and specific acid phosphatase (AP) activities decreased as mineral P fertilizer application rates and ratios increased. Redundancy analysis (RDA) showed that there were negative correlations between absolute and specific AP activities, pH, and total P contents, while there were positive correlations between soil absolute and specific βG, NAG, and LAP enzyme activities, and SOC and total N contents. RDA showed that the contents of actinomycete and Gram-positive bacterium PLFA biomarkers are more closely related to the absolute and specific enzyme activities than the other PLFA biomarkers (P b 0.01). Our results suggest that both the absolute and specific enzyme activities could be used as sensitive soil quality indicators that provide useful linkages with the microbial community structures and environmental factors. To maintain microbial activity and to minimize environmental impacts, P should be applied as a combination of inorganic and organic forms, and total P fertilizer application rates to subtropical paddy soils should not exceed 44 kg P ha −1 year −1 .

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“…3A). This observation was supported by a meta-analysis that revealed a 15.1% increase in microbial biomass after mineral fertilizers application (Geisseler and Scow, 2014). Interestingly, compared with the CK, the addition of only BC did not change microbial abundance and community structure.…”

Section: Effects Of Biochar and Fertilizer Addition On Microbial Commmentioning

confidence: 62%