scholarly journals Impact of poplar on soil organic matter quality and microbial communities in arable soils  

2013 ◽  
Vol 59 (No. 3) ◽  
pp. 95-100 ◽  
Author(s):  
C. Baum ◽  
Eckhardt K-U ◽  
J. Hahn ◽  
M. Weih ◽  
I. Dimitriou ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Microbial Communities ◽  
Mycorrhizal Fungi ◽  
Agricultural Land ◽  
Microbial Consortium ◽  
Phospholipid Fatty Acid ◽  
Bacterial Colonization ◽  
Ionization Mass ◽  
Organic Matter Quality

Poplars grown in short rotation coppice on agricultural land are a promising bioenergy crop. This study aimed to evaluate the soil organic matter (SOM) quality and viable microbial consortium under six-years-old poplar (Populus maximowiczii) and under wheat (Triticum aestivum) at a test site in central Germany. The SOM molecular composition and stability was determined by pyrolysis-field ionization mass spectrometry (Py-FIMS). The microbial consortium was assessed in terms of microbial phospholipid fatty acid (PLFA) profiles. Py-FIMS and the PLFAs agreed in showing crop-specific differences in the SOM quality and in the associated microbial communities. Higher proportions of carbohydrates, long-chained fatty acids, sterols and suberins at the expense of N-containing compounds under poplar than under wheat were associated with lower concentrations of microbial PLFAs in the organic matter. A higher ratio of total fungal to bacterial (f/b) PLFAs, a lower ratio of Gram-positive to Gram-negative bacterial PLFAs and lower biomass of arbuscular mycorrhizal fungi in the organic matter were revealed under poplar than under wheat. Lower N- and increased C-availability in the SOM promoted fungal vs. bacterial colonization, increased the SOM stability by a lower decomposability and caused SOM accumulation under poplar.

scholarly journals Sustainability of Impacts of Poplar Growth on Soil Organic Matter in Eutric Cambisols

Soil Systems ◽  
2019 ◽  
Vol 3 (2) ◽  
pp. 32
Author(s):  
Christel Baum ◽  
Martin Barth ◽  
Kathrin Henkel ◽  
Meike Siebers ◽  
Kai-Uwe Eckhardt ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Mycorrhizal Fungi ◽  
Litter Quality ◽  
Phospholipid Fatty Acid ◽  
Microbial Colonization ◽  
Annual Crops ◽  
No Till ◽  
Poplar Growth

Short rotation coppices (SRC) with poplar on arable soils constitute no-till management in combination with a changed litter quality compared to annual crops. Both tillage and litter quality impact soil organic matter (SOM) composition, but little is known on the sustainability of this impact at the molecular level. We compared the microbial colonization and SOM quantity and quality of a young (4 years), old (17 years) and a former SRC with hybrid poplar (Populus maximoviczii × Populus nigra cv. Max) to adjacent arable sites with annual crops or grass. Total fungal and arbsucular mycorrhizal fungal phospholipid fatty acid (PLFA) markers were increased under no-till treatments with permanent crops (SRC and grass) compared to tilled cereals. Enrichments in fungal biomass coincided with C accumulation close to the soil surface (0–5 cm) but was abolished under former SRC after return to annual tillage. This management change altered the spatial distribution but not the accumulation of SOM within the topsoil (0–30 cm). However, lasting qualitative changes in SOM with increased proportions of lignin, lipids and sterols were found under current and former SRC. Increased colonization by arbuscular mycorrhizal fungi was correlated with increased invertase activity (R = 0.64; p < 0.05), carbohydrate consumption and a corresponding accumulation of lignins and lipids in the SOM. This link indicates a regulatory impact of mycorrhizal fungi on soil C dynamics by changing the quality of SOM. Increased stability of SOM to microbial degradation by higher portions of lipids and sterols in the SOM were assumed to be a sustainable effect of poplar growth at Eutric Cambisols.

scholarly journals Biogeographic Changes in Forest Soil Microbial Communities of Offshore Islands—A Case Study of Remote Islands in Taiwan

Forests ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 4
Author(s):  
Ed-Haun Chang ◽  
Isheng Jason Tsai ◽  
Shih-Hao Jien ◽  
Guanglong Tian ◽  
Chih-Yu Chiu
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Microbial Communities ◽  
Phospholipid Fatty Acid ◽  
Soil Microbial Communities ◽  
Chemical Properties ◽  
Principal Component ◽  
Factors Affecting ◽  
Soil Microbial

Biogeographic separation has been an important cause of faunal and floral distribution; however, little is known about the differences in soil microbial communities across islands. In this study, we determined the structure of soil microbial communities by analyzing phospholipid fatty acid (PLFA) profiles and comparing enzymatic activities as well as soil physio-chemical properties across five subtropical granite-derived and two tropical volcanic (andesite-derived) islands in Taiwan. Among these islands, soil organic matter, pH, urease, and PLFA biomass were higher in the tropical andesite-derived than subtropical granite-derived islands. Principal component analysis of PLFAs separated these islands into three groups. The activities of soil enzymes such as phosphatase, β-glucosidase, and β-glucosaminidase were positively correlated with soil organic matter and total nitrogen. Redundancy analysis of microbial communities and environmental factors showed that soil parent materials and the climatic difference are critical factors affecting soil organic matter and pH, and consequently the microbial community structure.

scholarly journals Effect of land use and soil organic matter quality on the structure and function of microbial communities in pastoral soils: Implications for disease suppression

PLoS ONE ◽  
2018 ◽  
Vol 13 (5) ◽  
pp. e0196581 ◽  
Author(s):  
Bryony E. A. Dignam ◽  
Maureen O’Callaghan ◽  
Leo M. Condron ◽  
George A. Kowalchuk ◽  
Joy D. Van Nostrand ◽  
...  
Keyword(s):  
Land Use ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
Microbial Communities ◽  
Structure And Function ◽  
Disease Suppression ◽  
Organic Matter Quality ◽  
And Function ◽  
Soil Organic Matter Quality

scholarly journals The role of microbial diversity in the formation of soil organic matter quality and persistence

2021 ◽  
Author(s):  
Luiz A. Domeignoz-Horta ◽  
Melissa Shinfuku ◽  
Pilar Junier ◽  
Simon Poirier ◽  
Eric Verrecchia ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Microbial Diversity ◽  
Microbial Communities ◽  
Soil Carbon ◽  
Organic Matter Quality ◽  
Soil System ◽  
Soil Matrix ◽  
Model Soil ◽  
Molecular Complexity

AbstractThe largest terrestrial carbon sink on earth is soil carbon stocks. As the climate changes, the rate at which the Earth’s climate warms depends in part on the persistence of soil organic carbon. Microbial turnover forms the backbone of soil organic matter (SOM) formation and it has been recently proposed that SOM molecular complexity is a key driver of stability. Despite this, the links between microbial diversity, chemical complexity and biogeochemical nature of soil organic matter remain missing. Here we used a model soil system to test the hypothesis that more diverse microbial communities generate more stable soil organic matter. We inoculated microbial communities of varying diversities into an model soil matrix amended with simple carbon, and measured the thermal stability of the resultant soil organic matter. Using a novel data analysis approach with Rock-Eval® ramped thermal analysis, we found that microbial community diversity drives the chemical fingerprint of soil organic matter. Bacteria-only and low diversity communities lead to less chemically-diverse and more thermally-labile soil carbon pools than highly diverse communities. Our results provide direct evidence for a link between microbial diversity, molecular complexity and SOM stability. This evidence demonstrates the benefits of managing soils for maximum biological diversity as a means of building persistent SOM stocks.ClassificationBiological Sciences: Ecology

scholarly journals Impacts of long-term plant residue management on soil organic matter quality, Pseudomonas community structure and disease suppressiveness

2019 ◽  
Vol 135 ◽  
pp. 396-406 ◽  
Author(s):  
Bryony E.A. Dignam ◽  
Maureen O'Callaghan ◽  
Leo M. Condron ◽  
Jos M. Raaijmakers ◽  
George A. Kowalchuk ◽  
...  
Keyword(s):  
Organic Matter ◽  
Community Structure ◽  
Soil Organic Matter ◽  
Residue Management ◽  
Plant Residue ◽  
Organic Matter Quality ◽  
Soil Organic Matter Quality

scholarly journals European survey shows poor association between soil organic matter and crop yields

2020 ◽  
Vol 118 (3) ◽  
pp. 325-334
Author(s):  
Wytse J. Vonk ◽  
Martin K. van Ittersum ◽  
Pytrik Reidsma ◽  
Laura Zavattaro ◽  
Luca Bechini ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Sugar Beet ◽  
Significant Positive Correlation ◽  
Agricultural Land ◽  
Crop Yields ◽  
Carbon Sink ◽  
Significant Negative Correlation ◽  
Positive Correlation ◽  
Farm Survey

AbstractA number of policies proposed to increase soil organic matter (SOM) content in agricultural land as a carbon sink and to enhance soil fertility. Relations between SOM content and crop yields however remain uncertain. In a recent farm survey across six European countries, farmers reported both their crop yields and their SOM content. For four widely grown crops (wheat, grain maize, sugar beet and potato), correlations were explored between reported crop yields and SOM content (N = 1264). To explain observed variability, climate, soil texture, slope, tillage intensity, fertilisation and irrigation were added as co-variables in a linear regression model. No consistent correlations were observed for any of the crop types. For wheat, a significant positive correlation (p < 0.05) was observed between SOM and crop yields in the Continental climate, with yields being on average 263 ± 4 (95% CI) kg ha−1 higher on soils with one percentage point more SOM. In the Atlantic climate, a significant negative correlation was observed for wheat, with yields being on average 75 ± 2 (95%CI) kg ha−1 lower on soils with one percentage point more SOM (p < 0.05). For sugar beet, a significant positive correlation (p < 0.05) between SOM and crop yields was suggested for all climate zones, but this depended on a number of relatively low yield observations. For potatoes and maize, no significant correlations were observed between SOM content and crop yields. These findings indicate the need for a diversified strategy across soil types, crops and climates when seeking farmers’ support to increase SOM.

Conversion of Brazilian savannah to agricultural land affects quantity and quality of labile soil organic matter

Geoderma ◽  
2022 ◽  
Vol 406 ◽  
pp. 115509
Author(s):  
Rafael S. Santos ◽  
Martin Wiesmeier ◽  
Dener M.S. Oliveira ◽  
Jorge L. Locatelli ◽  
Matheus S.C. Barreto ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Agricultural Land ◽  
Brazilian Savannah ◽  
Labile Soil Organic Matter

scholarly journals Estimasi Karbon Tersimpan pada Nekromassa Tumbuhan di Rawa Lebak Kecamatan Martapura, Kalimantan Selatan

BIOSCIENTIAE ◽  
2021 ◽  
Vol 18 (2) ◽  
pp. 104
Author(s):  
Siam Melina ◽  
Krisdianto Krisdianto
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Carbon Storage ◽  
Agricultural Land ◽  
Plant Part ◽  
Sampling Location ◽  
Living Plant ◽  
Top Soil ◽  
Dead Plant ◽  
Potential Area

South Kalimantan is one of carbon contributor with an area of swamp with ± 1,140,207 ha area of swamp land. The potential area for changed to be an agricultural land is ± 763,207 ha, and the remain used for pool when the rainy season is come. The highest C reserve is in biomass (mass of living-plant part) and necromass (mass of dead-plant part) at the top soil, microbe, and soil-organic matter. Based on description above, the problem is how much stored-carbon in necromass of plant at martapura lowland swamp, because the largest carbon storage found in necromass of plant. The purpose of this study was to estimate the stored carbon contained in necromass of vegetation in lowland swamp. This research has been done in Martapura from April to July 2009. Sampling is done at 4 location include Tungkaran village, Keramat Baru village, Sungai Rangas village and Sungai Tabuk village. Each sampling location divided into 2 stations in one sampling. Analysis of stored-carbon in necromass of plant is using Walkey and Black Method. The result showed that average ranges of carbon stored in plant necromass are 490,95 – 1744,66 gm-2.  

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