Effect of nitrogen and phosphate fertilisers on microbial and nematode diversity in pasture soils

Sarathchandra, S. U.; Ghani, A.; Yeates, G. W.; Burch, G.; Cox, N. R.

doi:10.1016/s0038-0717(00)00245-5

Cited by 276 publications

(140 citation statements)

References 39 publications

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“…Different levels of N fertilizer decrease the abundance of omnivores-predators (Li et al, 2010). Sarathchandra et al (2001) observed a significant decrease in MI in the 400 kg N ha -1 yr -1 treatment, suggesting a disturbance of the nematode community structure leading to a relative decrease in the persister community; however, MI did not change at a rate of 200 kg N ha -1 yr -1 . The nematode MI can provide useful information on the direction of change within a particular soil (Yeates & Bongers, 1999).…”

Section: Discussionmentioning

confidence: 85%

Soil nematode responses to fertilization with ammonium nitrate after six years of unfertilized apple orchard

Azpilicueta¹,

Aruani

Chaves³

et al. 2014

Span. j. agric. res.

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A nematode community was used as a bioindicator of changes in agroecosystems caused by fertilization. The effect of applying nitrogen (N) fertilizer on a soil nematode community structure was studied in a soil which had not been fertilized for six years in the Rio Negro Valley, Argentina. Treatments were: i) 100 kg N ha-1 (N100); ii) 200 kg N ha-1 (N200); in each case 50% of the dosage was applied at the time of petal fall and 50% at fruit harvest in 2004/2005, 2005/2006, 2006/2007 growing seasons; and iii) control with no fertilizer (N0). Soil samples were collected in the 0 to 30 cm soil layer in October, November, April and July in each growing season. The number of bacterivores increased in N200 compared to N0. Cephalobidae were present in greater numbers in N200 than in N100 and N0. Predator abundance was lower under N200, after the first N application in each growing season. The ratio of fungivores to bacterivores (F/B) was 0.21, 0.3 and 0.41 in N200, N100 and N0, respectively. N200 resulted in a community with a lower maturity index (MI) than N0. Structure index (SI) was lower in N200 than N100 and N0. The enrichment index (EI) was less sensitive at detecting fertilizer effects. In November and April, soil nitrate concentrations were higher in N200 than in N100 and N0. Soil nitrate concentration was positively correlated with EI and negatively with MI, SI and F/B. N200 affected the trophic structure of the nematode community consistent with a less stable soil system.

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Section: Discussionmentioning

confidence: 85%

Soil nematode responses to fertilization with ammonium nitrate after six years of unfertilized apple orchard

Azpilicueta¹,

Aruani

Chaves³

et al. 2014

Span. j. agric. res.

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“…A phylogenetic tree was constructed using the neighbor-joining method [22]. Bootstrap analysis was performed based on 1000 re-samplings.…”

Section: Sequence Analysis and Phylogenetic Tree Constructionmentioning

confidence: 99%

“…Soil nitrogen content can be the limiting factor of biological growth; many studies have shown that soil nitrogen content can influence soil microbial biomass, activity and community composition [22]. Presence and abundance of fungi is more important than other microorganisms in the surface of soil, while bacteria are more important for degradation of the buried organic matter [23].…”

Section: The Soil Fungal Community Structure Similarity Of Different mentioning

confidence: 99%

Effects of Forest Age on Soil Fungal Community in a Northern Temperate Ecosystem

Zhiguang

Sui

2016

Indian J Microbiol

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The polymorphisms of soil fungal rDNA Internal Transcribed Spacer regions were studied in Korean pine forests of various ages (10-100-year-old trees) by means of cloned libraries, and analyzed to determine the effects of the trees' developmental stage on soil fungal community structure. The obtained Shannon diversity index (H) and richness (S) indicated that the diversity of the soil fungal community increased significantly with the development of Korean pines (P \ 0.05). In addition, cluster analysis (UPGMA) showed that the soil fungal community variety associated with differently aged Korean pines was higher than 50 %. The soil fungal community diversity correlated significantly with the N content and C/N ratio of the soil (P \ 0.05). The results of this study indicate that the age of in Korean pine can affect soil fungal community by altering soil properties, which in turn could affect the nutrient cycling in the forest ecosystem.

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“…The effect on populations of Dorylaimellus, the most common dorylaimid genus at the site, was apparent at planting and was still evident in the post-harvest sampling ( Table 7), suggesting that the treatment-related stress was more than a temporary effect that occurred when fertilisers were applied. This group of nematodes is particularly sensitive to various sources of N (Tenuta and Ferris 2004), and populations are often reduced by N and P fertilisers (Yeates and King 1997;Sarathchandra et al 2001), and so the negative effects of both N and P were not unexpected. It is possible that the response of dorylaimid nematodes was due to fertiliserinduced changes in the availability of their food sources, and if this could be confirmed and their feeding habits better understood, these nematodes may eventually prove to be useful biological indicators.…”

Section: Impact Of Artificial Fertilisersmentioning

confidence: 99%

Impacts of management on soil biota in Vertosols supporting the broadacre grains industry in northern Australia

Bell¹,

Seymour²,

Stirling³

et al. 2006

Soil Res.

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Abstract. The grain-producing regions of northern New South Wales and southern and central Queensland are characterised by cropping systems that are strongly dependent on stored soil moisture rather than in-crop rainfall, and tillage systems that are increasingly reliant on zero or minimum tillage. Crops are grown relatively infrequently and crop rotations are dominated by winter and summer grains (wheat [Triticum aestivum L.] and sorghum [Sorghum bicolor L. Moench], respectively), with smaller areas of grain legumes and cotton (Gossypium hirsutum L.). The grey, black, and brown Vertosols represent the more productive soils in the region under rainfed cropping, and are the focus of work reported in this study.Soil samples were collected from surface soils (0-0.30 m) across the region, utilising sites of long term tillage and residue management studies, fertiliser trials, and commercial fields to enable an assessment of the impact of various management practices on soil biological properties. A number of biological and biochemical parameters were measured (microbial biomass C, total organic C and labile C fractions, total C and N, microbial activity using FDA, cellulase activity, free living nematodes, total DNA and fatty acid profiles), and the response of wheat, sorghum, and chickpea (Cicer arietinum L.) to steam pasteurisation was assessed in glasshouse bioassays. The objective was to obtain an indication of the biological status of grain-growing soils and assess the impact of biological constraints in soils from different regions and management systems.Results showed that biological activity in cropped soils was consistently low relative to other land uses in northern Australia, with management practices like stubble retention and adoption of zero tillage producing relatively small benefits. In the case of zero tillage, many of these benefits were confined to the top 0.05 m of the soil profile. Fallowing to recharge soil moisture reserves significantly reduced all soil biological parameters, while pasture leys produced consistent positive benefits. Breaking a long fallow with a short duration grain or brown manure crop significantly moderated the negative effects of a long bare fallow on soil biology. Use of inorganic N and P fertilisers produced minimal effects on soil biota, with the exception of one component of the free-living nematode community (the Dorylaimida).The glasshouse bioassays provided consistent evidence that soil biota were constraining growth of both grain crops (sorghum and wheat) but not the grain legume (chickpea). The biota associated with this constraint have not yet been identified, but effects were consistent across the region and were not associated with the presence of any known pathogen or correlated with any of the measured soil biological or biochemical properties. Further work to confirm the existence and significance of these constraints under field conditions is needed.None of the measured biological or biochemical parameters consistently changed in response to management prac...

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Effect of nitrogen and phosphate fertilisers on microbial and nematode diversity in pasture soils

Cited by 276 publications

References 39 publications

Soil nematode responses to fertilization with ammonium nitrate after six years of unfertilized apple orchard

Soil nematode responses to fertilization with ammonium nitrate after six years of unfertilized apple orchard

Effects of Forest Age on Soil Fungal Community in a Northern Temperate Ecosystem

Impacts of management on soil biota in Vertosols supporting the broadacre grains industry in northern Australia

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