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Fungal/bacterial ratios in grasslands with contrasting nitrogen management.

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Fungal/bacterial ratios in grasslands with contrasting nitrogen management. / de Vries, Franciska T.; Hoffland, Ellis; van Eekeren, Nick et al.
In: Soil Biology and Biochemistry, Vol. 38, No. 8, 08.2006, p. 2092-2103.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

de Vries, FT, Hoffland, E, van Eekeren, N, Brussaard, L & Bloem, J 2006, 'Fungal/bacterial ratios in grasslands with contrasting nitrogen management.', Soil Biology and Biochemistry, vol. 38, no. 8, pp. 2092-2103. https://doi.org/10.1016/j.soilbio.2006.01.008

APA

de Vries, F. T., Hoffland, E., van Eekeren, N., Brussaard, L., & Bloem, J. (2006). Fungal/bacterial ratios in grasslands with contrasting nitrogen management. Soil Biology and Biochemistry, 38(8), 2092-2103. https://doi.org/10.1016/j.soilbio.2006.01.008

Vancouver

de Vries FT, Hoffland E, van Eekeren N, Brussaard L, Bloem J. Fungal/bacterial ratios in grasslands with contrasting nitrogen management. Soil Biology and Biochemistry. 2006 Aug;38(8):2092-2103. doi: 10.1016/j.soilbio.2006.01.008

Author

de Vries, Franciska T. ; Hoffland, Ellis ; van Eekeren, Nick et al. / Fungal/bacterial ratios in grasslands with contrasting nitrogen management. In: Soil Biology and Biochemistry. 2006 ; Vol. 38, No. 8. pp. 2092-2103.

Bibtex

@article{76a44e27bdac40b98949ff2332cfb87c,
title = "Fungal/bacterial ratios in grasslands with contrasting nitrogen management.",
abstract = "It is frequently hypothesised that high soil fungal/bacterial ratios are indicative for more sustainable agricultural systems. Increased F/B ratios have been reported in extensively managed grasslands. To determine the shifts in fungal/bacterial biomass ratio as influenced by grassland management and to find relations with nitrogen leaching potential, we sampled a two-year-old field experiment at an organic experimental farm in the eastern part of The Netherlands. The effect of crop (grass and grass-clover), N application rate (0, 40, 80, ) and manure type (no manure, farm yard manure and slurry) on the F/B ratio within three growing seasons was tested, as well as relations with soil and crop characteristics, nitrate leaching and partial N balance. Biomass of fungi and bacteria was calculated after direct counts using epifluorescence microscopy. Fungal and bacterial biomass and the F/B ratio were higher in grass than in grass-clover. The F/B ratio decreased with increasing N application rate and multiple regression analysis revealed a negative relationship with pH. Bacterial activity (measured as incorporation of [3H]thymidine and [14C]leucine into bacterial DNA and proteins) showed the exact opposite: an increase with N application rate and pH. Leaching increased with N application rate and was higher in grass-clover than in grass. Partial N balance was more positive at a higher N application rate and showed an inverse relationship with fungal biomass and F/B ratio. We conclude that the fungal/bacterial biomass ratio quickly responded to changes in management. Grasslands with higher N input showed lower F/B ratios. Grass-clover had a smaller fungal biomass and higher N leaching than grass. In general, a higher fungal biomass indicated a lower nitrogen leaching and a more negative partial N balance (or smaller N surplus), but more observations are needed to confirm the relationship between F/B ratio and sustainability.",
keywords = "Grassland, Microbial biomass, Fungi, Bacteria, Management, Nitrogen, Leaching, Clover",
author = "{de Vries}, {Franciska T.} and Ellis Hoffland and {van Eekeren}, Nick and Lijbert Brussaard and Jaap Bloem",
year = "2006",
month = aug,
doi = "10.1016/j.soilbio.2006.01.008",
language = "English",
volume = "38",
pages = "2092--2103",
journal = "Soil Biology and Biochemistry",
issn = "0038-0717",
publisher = "Elsevier Ltd",
number = "8",

}

RIS

TY - JOUR

T1 - Fungal/bacterial ratios in grasslands with contrasting nitrogen management.

AU - de Vries, Franciska T.

AU - Hoffland, Ellis

AU - van Eekeren, Nick

AU - Brussaard, Lijbert

AU - Bloem, Jaap

PY - 2006/8

Y1 - 2006/8

N2 - It is frequently hypothesised that high soil fungal/bacterial ratios are indicative for more sustainable agricultural systems. Increased F/B ratios have been reported in extensively managed grasslands. To determine the shifts in fungal/bacterial biomass ratio as influenced by grassland management and to find relations with nitrogen leaching potential, we sampled a two-year-old field experiment at an organic experimental farm in the eastern part of The Netherlands. The effect of crop (grass and grass-clover), N application rate (0, 40, 80, ) and manure type (no manure, farm yard manure and slurry) on the F/B ratio within three growing seasons was tested, as well as relations with soil and crop characteristics, nitrate leaching and partial N balance. Biomass of fungi and bacteria was calculated after direct counts using epifluorescence microscopy. Fungal and bacterial biomass and the F/B ratio were higher in grass than in grass-clover. The F/B ratio decreased with increasing N application rate and multiple regression analysis revealed a negative relationship with pH. Bacterial activity (measured as incorporation of [3H]thymidine and [14C]leucine into bacterial DNA and proteins) showed the exact opposite: an increase with N application rate and pH. Leaching increased with N application rate and was higher in grass-clover than in grass. Partial N balance was more positive at a higher N application rate and showed an inverse relationship with fungal biomass and F/B ratio. We conclude that the fungal/bacterial biomass ratio quickly responded to changes in management. Grasslands with higher N input showed lower F/B ratios. Grass-clover had a smaller fungal biomass and higher N leaching than grass. In general, a higher fungal biomass indicated a lower nitrogen leaching and a more negative partial N balance (or smaller N surplus), but more observations are needed to confirm the relationship between F/B ratio and sustainability.

AB - It is frequently hypothesised that high soil fungal/bacterial ratios are indicative for more sustainable agricultural systems. Increased F/B ratios have been reported in extensively managed grasslands. To determine the shifts in fungal/bacterial biomass ratio as influenced by grassland management and to find relations with nitrogen leaching potential, we sampled a two-year-old field experiment at an organic experimental farm in the eastern part of The Netherlands. The effect of crop (grass and grass-clover), N application rate (0, 40, 80, ) and manure type (no manure, farm yard manure and slurry) on the F/B ratio within three growing seasons was tested, as well as relations with soil and crop characteristics, nitrate leaching and partial N balance. Biomass of fungi and bacteria was calculated after direct counts using epifluorescence microscopy. Fungal and bacterial biomass and the F/B ratio were higher in grass than in grass-clover. The F/B ratio decreased with increasing N application rate and multiple regression analysis revealed a negative relationship with pH. Bacterial activity (measured as incorporation of [3H]thymidine and [14C]leucine into bacterial DNA and proteins) showed the exact opposite: an increase with N application rate and pH. Leaching increased with N application rate and was higher in grass-clover than in grass. Partial N balance was more positive at a higher N application rate and showed an inverse relationship with fungal biomass and F/B ratio. We conclude that the fungal/bacterial biomass ratio quickly responded to changes in management. Grasslands with higher N input showed lower F/B ratios. Grass-clover had a smaller fungal biomass and higher N leaching than grass. In general, a higher fungal biomass indicated a lower nitrogen leaching and a more negative partial N balance (or smaller N surplus), but more observations are needed to confirm the relationship between F/B ratio and sustainability.

KW - Grassland

KW - Microbial biomass

KW - Fungi

KW - Bacteria

KW - Management

KW - Nitrogen

KW - Leaching

KW - Clover

U2 - 10.1016/j.soilbio.2006.01.008

DO - 10.1016/j.soilbio.2006.01.008

M3 - Journal article

VL - 38

SP - 2092

EP - 2103

JO - Soil Biology and Biochemistry

JF - Soil Biology and Biochemistry

SN - 0038-0717

IS - 8

ER -