Long‐Term No‐till Supports Greater Asymbiotic Nitrogen Fixation

CSA News ◽  
2019 ◽  
Vol 64 (9) ◽  
pp. 8-8
Keyword(s):  
Nitrogen Fixation ◽  
No Till ◽  
Asymbiotic Nitrogen Fixation

scholarly journals Asymbiotic nitrogen fixation is greater in soils under long-term no-till versus conventional tillage

2018 ◽  
Author(s):  
David W. Franzen ◽  
Patrick W. Inglett ◽  
Caley K. Gasch
Keyword(s):  
Soil Microorganisms ◽  
Conventional Tillage ◽  
N Fixation ◽  
Reduction Procedure ◽  
Fixation Rate ◽  
No Till ◽  
Asymbiotic Nitrogen Fixation ◽  
Deep Sample ◽  
Similar Soil

A series of N-rate experiments was previously conducted in spring wheat, corn and sunflower in North Dakota indicated that less N was required when fields were in 6-years or more continuous no-till compared to conventional till. The objective of this study was to determine whether part of the reason for the decreased requirement for N was the greater activity of asymbiotic N-fixing organisms. Twelve paired-samplings were conducted in 2018. A surface 0-5cm deep sample was obtained in a long-term no-till field directly across the fence/road from a similar soil in conventional till. Samples were incubated in an acetylene-reduction procedure to estimate N fixation rate. Ten of twelve paired samplings had greater asymbiotic N fixation compared to the conventional till counterpart. This indicates that long-term no-till soils support greater N production from soil microorganisms than conventional till soils, which would result in lower input costs to no-till farmers.

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 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.

Sign in / Sign up

Export Citation Format

Share Document