Grass species and soil type effects on microbial biomass and activity

Groffman, Peter M.; Eagan, Patrick D.; Sullivan, W. Michael; Lemunyon, J. L.

doi:10.1007/bf02185565

Cited by 96 publications

(51 citation statements)

References 30 publications

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“…In the current experiment plant species composition does affect potential nitrification activity. Furthermore, the results from our experiment substantiate the results found by Groffman et al (1996) who showed that plant species can create differences in microbial activity in soil. The soils for this experiment were collected in autumn, when nutrient up-take by plants ceases and soil microbial processes rates, e.g.…”

Section: Discussionsupporting

confidence: 91%

Repression of potential nitrification activities by matgrass sward species

et al. 2010

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Soil nitrification is a key process in regulating the relative availability of the various inorganic N forms to plants. In the current study, we investigated the effect of different plant species on numbers of ammoniaoxidizing microbial cells by measuring the potential nitrification activity (PAA). Soil from matgrass sward and from calcareous grassland was collected in the field and four characteristic plant species of each vegetation type were cultivated from seed. These plant species grew for 4 months in the two soil types. After those 4 months, PAA were significantly higher in calcareous soil compared to the matgrass sward soil and the presence of matgrass sward species had significantly decreased PAA in this soil. In soils from matgrass stands, PAA were much lower, and no effect of the different plant species could be detected. Plant biomass of the calcareous grassland species was overall positively correlated with PAA, whereas for matgrass plant species a negative trend was found. We conclude that matgrass sward plant species had a clear repressing effect on the potential ammonia-oxidizing activity in calcareous grassland soil within this 4-month growth experiment. The observed repression of PAA is in accordance with earlier field observations of PAA in the different vegetation zones, where repressed PAA and significant higher ammonium to nitrate ratios were observed in the matgrass sward vegetation compared to the other vegetation zones. Major findings of this study indicate that plant species can influence the nitrification potential of their habitats, i.e. certain species can repress nitrification potential and others can increase nitrification potential of their habitats.

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Section: Discussionsupporting

confidence: 91%

Repression of potential nitrification activities by matgrass sward species

et al. 2010

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“…R. leguminosarum genotypes are not evenly distributed across the United Kingdom (7,36). The soil type can affect microbial activity (6), possibly due to differences in the distribution of suitable niches (22) and predation pressure by protozoa (3). Cultivation of the host plant has been shown to have a homogenizing effect on rhizobial populations (10), but none of the arable sites in this study had cropped peas within the past 5 years and host plants of R. leguminosarum biovar viciae were very uncommon at the pasture sites.…”

mentioning

confidence: 99%

Higher Diversity of Rhizobium leguminosarum Biovar viciae Populations in Arable Soils than in Grass Soils

Palmer

Young

2000

Appl Environ Microbiol

113

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The bacterial genetic diversity after long-term arable cultivation was compared with that under permanent grassland using replicated paired contrasts. Pea-nodulating Rhizobium leguminosarum populations were sampled from pairs of arable and grass sites at four locations in Yorkshire, United Kingdom. Isolates were characterized using both chromosomal (16S-23S ribosomal DNA internal transcribed spacer PCR-restriction fragment length polymorphism) and plasmid (group-specific repC PCR amplification) markers. The diversities of chromosomal types, repC profiles, and combined genotypes were calculated using richness in types (adjusted to equal sample sizes by rarefaction), Shannon-Wiener index, and Simpson's index. The relative differences in diversity within each pair of sites were similar for all three diversity measures. Chromosomal types, repC profiles, and combined genotypes were each more diverse in arable soils than in grass soils at two of the four locations. The other comparisons showed no significant differences. We conclude that rhizobial diversity can be affected by differences between these two management regimens. Multiple regression analyses indicated that lower diversity was associated with high potential nitrogen and phosphate levels or with acidity.

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“…Soil texture is affective on aggregate stabilization and not aggregate formation (De Gryze et al 2006). In comparison with grass species soil texture significantly affected soil respiration, microbial biomass C, and potential mineralization, nitrification and denitrification (Groffman et al 1996). Therefore, as stated, soil texture may have a great impact on soil structure.…”

Section: Introductionmentioning

confidence: 93%

“…Clay and sandy soils, significantly increased nodule and root dry weights, respectively (Table 3). Groffman et al (1996) stated that soil texture is an important parameter controlling soil microbial biomass. This may be attributed to the higher ratio of soil porosity in loamy and clay soils making the conditions more favorable for the biological activities of the bacteria and plant roots, including the biochemical communications between the bacteria and the plant at the onset of symbiosis.…”

Section: Genistein (Mm) Leafmentioning

confidence: 99%

Using signal molecule genistein to alleviate the stress of suboptimal root zone temperature on soybean-Bradyrhizobium symbiosis under different soil textures

Miransari

Smith

2008

TJPI

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Suboptimal root zone temperatures (RZTs) (below 258C) in Canada until July may adversely affect the secretion of interorganismal signal molecules such as genistein by soybean and hence, the soybean-Bradyrhizobium symbiosis. We also proposed for the first time that soil texture might play a role in these biochemical communications. Soybean plants, planted in undisturbed soil samples (with sandy, loamy and clay textures), collected from the field, were subjected to three different soil temperatures (14, 19 and 248C). Bradyrhizobium japonicum (strain 532C) inocula, preincubated with four levels of genistein (0, 5, 10 and 20 mM), were used to inoculate the plants. The experiment was conducted at the research greenhouse of Macdonald Campus, McGill University, Canada. The effects of genistein 5 and 20 mM on soybean nodulation and growth were significant at 148C. As genistein was more effective in loamy and clay soils, soil texture may also be a determining factor in the biochemical communications between B. japonicum and soybean.

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Grass species and soil type effects on microbial biomass and activity

Cited by 96 publications

References 30 publications

Repression of potential nitrification activities by matgrass sward species

Repression of potential nitrification activities by matgrass sward species

Higher Diversity of Rhizobium leguminosarum Biovar viciae Populations in Arable Soils than in Grass Soils

Using signal molecule genistein to alleviate the stress of suboptimal root zone temperature on soybean-Bradyrhizobium symbiosis under different soil textures

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