Microbial community diversity in agroforestry and grass vegetative filter strips

Unger, Irene M.; Goyne, Keith W.; Kremer, Robert J.; Kennedy, Ann C.

doi:10.1007/s10457-012-9559-8

Cited by 36 publications

(41 citation statements)

References 30 publications

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“…. In earlier studies, the microbial community diversity in agroforestry and grass vegetative filter strip shows difference in soil microbial population . The findings of the present study is in corroboration with the observations made by earlier researchers and their findings revealed that the predominance of bacteria over fungi in the total microbial population.…”

Section: Discussionsupporting

confidence: 92%

“…The results of the present study strongly agrees with the previous report that the leading bacterial diversity is due to the presence of organic content such as carbon, nitrogen, phosphorous, etc. [12]. In earlier studies, the microbial community diversity in agroforestry and grass vegetative filter strip shows difference in soil microbial population [12].…”

Section: Discussionmentioning

confidence: 92%

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Status of microbial diversity in agroforestry systems in Tamil Nadu, India

Radhakrishnan

Varadharajan

2016

J. Basic Microbiol.

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Soil is a complex and dynamic biological system. Agroforestry systems are considered to be an alternative land use option to help and prevent soil degradation, improve soil fertility, microbial diversity, and organic matter status. An increasing interest has emerged with respect to the importance of microbial diversity in soil habitats. The present study deals with the status of microbial diversity in agroforestry systems in Tamil Nadu. Eight soil samples were collected from different fields in agroforestry systems in Cuddalore, Villupuram, Tiruvanamalai, and Erode districts, Tamil Nadu. The number of microorganisms and physico-chemical parameters of soils were quantified. Among different microbial population, the bacterial population was recorded maximum (64%), followed by actinomycetes (23%) and fungi (13%) in different samples screened. It is interesting to note that the microbial population was positively correlated with the physico-chemical properties of different soil samples screened. Total bacterial count had positive correlation with soil organic carbon (C), moisture content, pH, nitrogen (N), and micronutrients such as Iron (Fe), copper (Cu), and zinc (Zn). Similarly, the total actinomycete count also showed positive correlations with bulk density, moisture content, pH, C, N, phosphorus (P), potassium (K), calcium (Ca), copper (Cu), magnesium (Mg), manganese (Mn), and zinc (Zn). It was also noticed that the soil organic matter, vegetation, and soil nutrients altered the microbial community under agroforestry systems.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 92%

Status of microbial diversity in agroforestry systems in Tamil Nadu, India

Radhakrishnan

Varadharajan

2016

J. Basic Microbiol.

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“…Microbial biodiversity is the mix of living soil microbes belowground and includes bacteria, fungi, rhizobia, arbuscular mycorrhizae, saprophytes, and other microbial groups (Roesch et al., 2007). Planting and growing perennial vegetative management systems (e.g., agroforestry, grass, and biomass/biofuel management practices) can contribute by (i) enhancing the quantity of soil microbial biomass belowground (Balota et al., 2015; Lovell & Sullivan, 2006; Milne & Haynes, 2004; Unger, Goyne, Kremer, & Kennedy, 2013; Veum et al., 2015), (ii) increasing soil organic C (SOC) inputs (Udawatta, Kremer, Adamson, & Anderson, 2008; Veum, Goyne, Kremer, & Motavalli, 2012), and (iii) improving overall soil quality (Alagele, Anderson, Udawatta, Veum, & Rankoth, 2019a; Weerasekara, Udawatta, Jose, Kremer, & Weerasekara, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Although PLFA values do not reflect absolute biomass values, PLFA biomarkers can be used as an estimate of total microbial biomass in soil (Frostegård et al., 2011) and can be used to explain the impact of short‐ and long‐term vegetative management practices on soil microbial biomass (Zelles, 1997, 1999). Therefore, various studies have been conducted to assess the effects of agricultural management practices and environmental factors, such as cover crops, tillage, fertilizer, and pesticide applications (Helgason et al., 2010; Mbuthia et al., 2015; Nivelle et al., 2016; Rankoth et al., 2019); perennial buffer strips (Bossio, Scow, Gunapala, & Graham, 1998; Unger et al., 2013); organic farming system (Esperschütz, Gattinger, Mäder, Schloter, & Fließbach, 2007); and season (Hamel et al., 2006) on PLFA biomarkers. These studies have demonstrated that agricultural management systems and site‐specific considerations influence microbial biomass in the soil.…”

Section: Introductionmentioning

confidence: 99%

Long‐term perennial management and cropping effects on soil microbial biomass for claypan watersheds

et al. 2020

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Sustainable vegetative management plays a significant role in improving soil quality in degraded agricultural landscapes by enhancing soil microbial biomass. This study investigated the effects of grass buffers (GBs), biomass crops (BCs), grass waterways (GWWs), and agroforestry buffers (ABs) on soil microbial biomass and soil organic C (SOC) compared with continuous corn (Zea mays L.)-soybean [Glycine max (L.)Merr.] rotation (row crop [RC]) on claypan soils. The RC, AB, GB, GWW, and BC treatments were established in 10-cm depth at summit, backslope, and footslope landscape positions. Within AB treatment, soils were collected from the 50-cm and 150-cm tree distance. Total microbial biomass and biomass of gram-positive bacteria, gram-negative bacteria, actinomycetes, rhizobia, fungi, arbuscular mycorrhizae, saprophytes, and protozoa were determined by phospholipid fatty acid (PLFA) analysis. Results showed that soil microbial biomass and SOC across all microbial groups were significantly higher (P < .01) under perennial vegetation treatments compared with RC. The footslope position exhibited the highest total microbial biomass compared with the summit and backslope positions. The sampling distance of 50 cm from the tree base demonstrated 16% greater total microbial biomass and 15% higher SOC compared with 150 cm. These findings highlight the influence of landscape on soil biological properties and show that perennial vegetation systems have the potential to increase soil microbial biomass and enhance agricultural sustainability in degraded RC systems.Abbreviations: AB, agroforestry buffer; AC, active carbon; AB150, agroforestry buffer at 150 cm distance; AB50, agroforestry buffer at 50 cm

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“…Continuous vegetative cover (e.g., permanent cover crop or living ground cover) without tillage and varied complex organic matter inputs that contain high C concentrations have been acknowledged as factors contributing to a higher F:B (Unger et al, 2013). Unger et al (2013) compared tree-based intercropping systems with vegetative strips of grass and annual crop systems, all of which were planted in 1991. They showed a similar lack of significant difference in overall total soil microbial abundance between treatments in 2009; however, significant shifts of specific species occurred within total bacterial and fungal communities.…”

Section: Discussionmentioning

confidence: 99%

The establishment of apple orchards as temperate forest garden systems and their impact on indigenous bacterial and fungal population abundance in Southern Ontario, Canada

Wartman

Dunfield

Khosla

et al. 2016

Renew. Agric. Food Syst.

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This research investigated soil microbial abundances affected by different ground management systems in establishing apple (Malus domestica cv. Idared, M9) orchards in Ontario, Canada. Four treatments, including forest garden systems with and without compost (FGSC and FGS), and grass understory systems with and without compost (GC and G), were assessed over two establishment years for gene copy abundance of soil arbuscular mycorrhizal (AM) fungi, total fungi and total bacteria using quantitative real-time polymerase chain reactions. Time had a greater effect on all three soil microbial abundances, with total bacterial and AM fungi decreasing and total fungal abundance increasing from spring 2013 to fall 2014. The changes were greatest between the sampling dates of fall 2013 and spring 2014, which is 1 yr after the establishment of the experimental apple plots. There were no significant differences in soil microbial abundances between treatments at any specific sampling date. Apple tree trunk circumference was greatest for FGSC and FGS after 2 yr, but no significant differences in GC and G treatments. In the last sampling period, fall 2014, FGSC plots had significantly greater trunk circumferences compared with G plots. Soil chemical properties neither changed over the 2 yr, nor did they differ between treatments at any one sampling time. We conclude that the applebased FGS treatments can benefit apple tree growth and there is a basis for future research to explore specific plantplant, plant-microbe and microbe-microbe relations in FGSs.

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Microbial community diversity in agroforestry and grass vegetative filter strips

Cited by 36 publications

References 30 publications

Status of microbial diversity in agroforestry systems in Tamil Nadu, India

Status of microbial diversity in agroforestry systems in Tamil Nadu, India

Long‐term perennial management and cropping effects on soil microbial biomass for claypan watersheds

The establishment of apple orchards as temperate forest garden systems and their impact on indigenous bacterial and fungal population abundance in Southern Ontario, Canada

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