Responses of soil nematode communities to agroecological crop management systems

Nematology ◽  
2012 ◽  
Vol 14 (2) ◽  
pp. 209-221 ◽  
Author(s):  
Débora Cristina Santiago ◽  
Giovani de Oliveira Arieira ◽  
Edinei de Almeida ◽  
Maria de Fátima Guimarães
Keyword(s):  
Trophic Structure ◽  
Biological Indicators ◽  
Management Systems ◽  
Soil Nematode ◽  
Canavalia Ensiformis ◽  
Nematode Communities ◽  
Plant Feeding ◽  
Nematode Diversity ◽  
Crop Management Systems ◽  
The Impact

Soil nematodes are sensitive to human intervention and widely used as biological indicators of disruptions and alterations in soil quality. The aim of this work was to identify nematodes that are good biological indicators in maize crops under different management systems, and to establish the impact levels of these systems. Soil samples were collected over a 3-year period at a depth of 0.0-0.3 m in areas under six different management systems for maize (Zea mays) monoculture, and intercropped maize and Canavalia ensiformis. Six areas of native vegetation were also assessed to provide a reference for ecological balance. After identification and counting, nematode communities were characterised according to abundance (total and relative), diversity (identified genera and diversity indexes), trophic structure and ecological maturity (disturbance indexes). Nematodes proved to be good ecological indicators, responding to the systems employed. Intercropping maize and Canavalia ensiformis in at least one assessment year reduced disruption and increased nematode diversity, which were both verified based on specific indexes. It was also observed that the maize monoculture increased disruption leading to a drop in nematode fauna diversity and an increase in the incidence of plant-feeding nematodes.

scholarly journals Effect of mechanical disturbances on nematode communities in arable land

2006 ◽  
Vol 43 (2) ◽  
pp. 117-121 ◽  
Author(s):  
M. Brmež ◽  
M. Ivezić ◽  
E. Raspudić
Keyword(s):  
Community Structure ◽  
Trophic Structure ◽  
Arable Land ◽  
Anthropogenic Factors ◽  
No Tillage ◽  
Soil Ecosystem ◽  
Nematode Communities ◽  
Plant Feeding ◽  
The Impact ◽  
Mechanical Disturbances

AbstractNematode communities were used as bioindicators of changes in agroecosystems caused by anthropogenic factors. The aim of this study was to examine the impact of plowing and harrowing on nematode communities structure in comparison to “no tillage” treatments. The effects of mechanical disturbing of nematodes were determined on four soil treatments. Differences in nematode community structure were compared between two tillage regimes: standard tillage and no tillage. Research was conducted in 2000, in Kneževo near Osijek. Plowing had impact on increasing of bacterivorous nematodes and decreasing of fungivorous nematodes. Pratylenchus, Helicotylenchus and Tylenchus were dominant plant-feeding nematodes in no tillage treatments, while in plowing treatments Pratylenchus and Tylenchus were dominant. Abundance of Aphelenchoides decreased significantly after plowing. Tillage affected nematode communities in the soil ecosystem by changing the trophic structure and gave a decreasing, but not statistically significant, trend in MI.

scholarly journals Impact of crop management systems on soil nematode communities in South Brazil

2022 ◽  
Vol 79 (1) ◽  
Author(s):  
Andressa Cristina Zamboni Machado ◽  
Maurício Rumenos Guidetti Zagatto ◽  
Francisco Skora Neto ◽  
Santino Aleandro da Silva ◽  
Luiz Antonio Zanão Júnior
Keyword(s):  
Crop Management ◽  
Management Systems ◽  
Soil Nematode ◽  
Nematode Communities ◽  
Crop Management Systems ◽  
South Brazil ◽  
Soil Nematode Communities

Changes in soil nematode communities under the impact of fertilizers

2007 ◽  
Vol 40 (6) ◽  
pp. 681-693 ◽  
Author(s):  
L. I. Gruzdeva ◽  
E. M. Matveeva ◽  
T. E. Kovalenko
Keyword(s):  
Soil Nematode ◽  
Nematode Communities ◽  
The Impact ◽  
Soil Nematode Communities

Soil nematode community response to fertilisation in the root-associated and bulk soils of a rice-wheat agroecosystem

Nematology ◽  
2016 ◽  
Vol 18 (6) ◽  
pp. 727-741 ◽  
Author(s):  
Ting Liu ◽  
Yong Li ◽  
Qirong Shen ◽  
Huixin Li ◽  
Joann K. Whalen
Keyword(s):  
Agricultural Soils ◽  
Community Response ◽  
Paddy Rice ◽  
Bulk Soil ◽  
Rice Soil ◽  
Soil Nematode ◽  
Nematode Density ◽  
Nematode Communities ◽  
Nematode Diversity ◽  
Growing Conditions

The practice of growing agricultural crops in rows results in larger soil nematode populations in the root-associated soil than in the bulk soil between the rows. Fertilisers applied to improve grain yield generally increase the abundance of nematode communities in agricultural soils. The objective of this study was to compare total nematode density and four dominant genera in the root-associated and bulk soils of paddy rice and upland wheat receiving organic and mineral fertilisers. Dominant nematode genera accounted for 80% of all nematodes and represented four trophic groups. There was greater total nematode density and a higher enrichment index (EI) but less nematode diversity (H′) and a lower structure index (SI) in the root-associated soil than bulk soil of upland wheat. By contrast, nematode abundance, diversity and ecological indices were similar in the root-associated and bulk soils of the paddy rice. Soil nematode communities were affected significantly and consistently by fertilisation in upland wheat and paddy rice phases. More herbivoreHirschmanniellawere present with mineral fertiliser than in the non-fertilised control. Straw-based organic fertilisers increased the abundance of bacterivoreEucephalobus. The lack of interaction between rhizosphere effect and fertilisation indicated that crop-growing conditions (different species and water regimes) were more influential on nematode communities and not consistently impacted by short-term organic and mineral fertilisation in the rice-wheat agroecosystem.

Forest fires alter the trophic structure of soil nematode communities

2017 ◽  
Vol 109 ◽  
pp. 107-117 ◽  
Author(s):  
Konstantin O. Butenko ◽  
Konstantin B. Gongalsky ◽  
Daniil I. Korobushkin ◽  
Klemens Ekschmitt ◽  
Andrey S. Zaitsev
Keyword(s):  
Forest Fires ◽  
Trophic Structure ◽  
Soil Nematode ◽  
Nematode Communities ◽  
Soil Nematode Communities

scholarly journals Different changes of soil nematode communities in replant and continuous-planting peach orchards and their indicative value for peach replant problem

2015 ◽  
Vol 52 (3) ◽  
pp. 261-269 ◽  
Author(s):  
X. Y. Li ◽  
Q. Z. Liu ◽  
Y. Z. Wang ◽  
H. Y. Sun ◽  
C. Q. Bai ◽  
...  
Keyword(s):  
Profile Analysis ◽  
Distribution Patterns ◽  
Soil Nematode ◽  
Plant Feeding ◽  
Key Factor ◽  
Nematode Diversity ◽  
Replant Problem ◽  
Peach Trees ◽  
And Function ◽  
Peach Orchard

Abstract Long-term changes of soil nematode diversity and distribution patterns in replant peach orchard (RPO) and continuous-planting peach orchard (CPPO) were assessed to evaluate different effects on nematode community and function by RPO and CPPO, in relation to peach replant problem from the point of soil fauna. Observations were conducted on a silt loam soil, and soil sampling was performed four times through the growing season of peach trees in the period from 2006 to 2008 in Pinggu, Beijing. The result showed that RPO differed from CPPO by its higher abundance of plant feeding nematodes but lower abundance of bacterivore nematodes, as well as significantly higher values of plant parasite index but lower nematode biodiversity. Obviously, the absolute abundance of Paratylenchus in RPO was higher than that in CPPO, which could be a key factor for the peach replant problems from the part of soil nematode. Nematode function indices and weighted nematode fauna profile analysis were no significantly different in the two peach ecosystems, but they represented an indication of high disturbance, N-enriched, bacterial decomposition pathway.

scholarly journals Effect of heavy metals on soil nematode communities in the vicinity of a metallurgical plant in North Slovakia

2015 ◽  
Vol 52 (3) ◽  
pp. 252-260 ◽  
Author(s):  
P. Šalamún ◽  
V. Hanzelová ◽  
D. Miklisová ◽  
T. Brázová
Keyword(s):  
Stress Responses ◽  
Industrial Pollution ◽  
Pollution Source ◽  
Soil Nematode ◽  
Free Living ◽  
Nematode Communities ◽  
Generic Composition ◽  
Free Living Nematode ◽  
Nematode Diversity ◽  
Remote Sites

Abstract The effect of industrial pollution from chromium ferroalloys production on soil free-living nematode assemblages, c-p groups and generic composition was investigated along 7-km transect. From trace elements (Cr, Cu, Ni and Pb), only chromium exceeded the thresholds for uncontaminated soils (10 mg.kg-1) near the pollution source. In contrast mobilizable fraction of Cr has increased with the distance from the pollution source and was found to be positively correlated with Cox, soil pH, and moisture. Generic richness (nematode diversity) was also higher at remote sites. The low contamination has no significant impact on the nematode communities as illustrated by the c-p groups composition and balanced community structure. Widely applied ecological indices SI and EI also proved maturing ecosystem without any significant stress responses

scholarly journals Nicienie glebowe na polu i odłogu – zagęszczenie i różnorodność

2011 ◽  
Vol 9 (2) ◽  
pp. 45-66
Author(s):  
Krassimira Ilieva-Makulec ◽  
Renata Franczak ◽  
Grzegorz Makulec
Keyword(s):  
Trophic Structure ◽  
Diversity Index ◽  
Taxonomic Composition ◽  
Arable Soil ◽  
Nematode Community ◽  
Soil Nematode ◽  
Nematode Density ◽  
Nematode Communities ◽  
Arable Field ◽  
Dominance Structure

The results presented here concern the study, which was carried out in spring 2009 on an arable field and a fallow. The following parameters were analyzed: density, taxonomic composition, trophic and dominance structure of soil nematode communities. Shannon-Weaver diversity index, Sørensen’s index of similarity, and Maturity index were also calculated. The results show that the nematode community in the soil of arable field differed from that on the fallow in respect of density and trophic structure. Nematode density was higher in the arable soil than in the fallow. The group of bacterial-feeding nematodes was the most numerous among five trophic groups recorded in the study. The higher density of that group in the arable soil than in the fallow indicates the positive response of bacterial-feeding nematodes to the higher nutrient supply after the manure applying. The results show that in three years of fallow nematode communities became more mature and diverse than in the arable soil. The study confirms the indicative value of some nematode community parameters and indices for the assessment of the varying human intervention and the functional state of the soil.

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