scholarly journals Long-term lime and gypsum amendment increase nitrogen fixation and decrease nitrification and denitrification gene abundances in the rhizosphere and soil in a tropical no-till intercropping system

Geoderma ◽  
2020 ◽  
Vol 375 ◽  
pp. 114476 ◽  
Author(s):  
João William Bossolani ◽  
Carlos Alexandre Costa Crusciol ◽  
Luis Fernando Merloti ◽  
Luiz Gustavo Moretti ◽  
Nídia Raquel Costa ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
No Till ◽  
Denitrification Gene ◽  
Nitrification And Denitrification

scholarly journals Edaphic factors and plants influence denitrification in soils from a long-term arable experiment

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Ian M. Clark ◽  
Qingling Fu ◽  
Maïder Abadie ◽  
Elizabeth R. Dixon ◽  
Aimeric Blaud ◽  
...  
Keyword(s):  
Gas Production ◽  
Soil Treatment ◽  
Soil Microbiome ◽  
Arable Soils ◽  
Experimental Conditions ◽  
Mineral N ◽  
Nitrate Availability ◽  
Denitrification Gene ◽  
Denitrification Genes

Abstract Factors influencing production of greenhouse gases nitrous oxide (N2O) and nitrogen (N2) in arable soils include high nitrate, moisture and plants; we investigate how differences in the soil microbiome due to antecedent soil treatment additionally influence denitrification. Microbial communities, denitrification gene abundance and gas production in soils from tilled arable plots with contrasting fertilizer inputs (no N, mineral N, FYM) and regenerated woodland in the long-term Broadbalk field experiment were investigated. Soil was transferred to pots, kept bare or planted with wheat and after 6 weeks, transferred to sealed chambers with or without K15NO3 fertilizer for 4 days; N2O and N2 were measured daily. Concentrations of N2O were higher when fertilizer was added, lower in the presence of plants, whilst N2 increased over time and with plants. Prior soil treatment but not exposure to N-fertiliser or plants during the experiment influenced denitrification gene (nirK, nirS, nosZI, nosZII) relative abundance. Under our experimental conditions, denitrification generated mostly N2; N2O was around 2% of total gaseous N2 + N2O. Prior long-term soil management influenced the soil microbiome and abundance of denitrification genes. The production of N2O was driven by nitrate availability and N2 generation increased in the presence of plants.

scholarly journals Long-term fate of nitrogen fixation in Pleurozium schreberi Brid (Mit.) moss carpets in boreal forests

2022 ◽  
Vol 169 ◽  
pp. 104215
Author(s):  
Thomas H. DeLuca ◽  
Olle Zackrisson ◽  
Marie-Charlotte Nilsson ◽  
Shouqin Sun ◽  
María Arróniz-Crespo
Keyword(s):  
Nitrogen Fixation ◽  
Boreal Forests ◽  
Pleurozium Schreberi ◽  
Fate Of Nitrogen

Long-term (47 yr) effects of tillage and frequency of summerfallow on soil organic carbon in a Dark Brown Chernozem soil in western Canada

2016 ◽  
Vol 96 (4) ◽  
pp. 347-350 ◽  
Author(s):  
Elwin G. Smith ◽  
H. Henry Janzen ◽  
Lauren Scherloski ◽  
Francis J. Larney ◽  
Benjamin H. Ellert
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Carbon Concentration ◽  
Western Canada ◽  
Conservation Value ◽  
Chernozem Soil ◽  
No Till ◽  
Organic Carbon Concentration ◽  
Annual Changes

After 47 yr of no-till and reduced summerfallow at Lethbridge, Alberta, soil organic carbon concentration and stocks increased 2.14 g kg−1 and 2.22 Mg ha−1, respectively, in the surface 7.5 cm layer. These findings confirmed the conservation value of reducing tillage and summerfallow. The annual changes were relatively small.

Strategic tillage may sustain the benefits of long-term no-till in a Vertisol under Mediterranean climate

2019 ◽  
Vol 185 ◽  
pp. 17-28 ◽  
Author(s):  
İsmail Çelik ◽  
Hikmet Günal ◽  
Mert Acar ◽  
Nurullah Acir ◽  
Zeliha Bereket Barut ◽  
...  
Keyword(s):  
Mediterranean Climate ◽  
No Till
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