Significance of organic nitrogen uptake from plant residues by soil microorganisms as affected by carbon and nitrogen availability

Soil microorganisms play an important role in the organic matter transformation process. The soil microorganisms also are in symbiotic relationship with plants. At the same time, soil microorganisms are sensitive to both anthropogenic and natural habitat changes. Particular characteristics of organic matter (the C:N relation, pH, the content the content of assimilated nutrients, the xenobiotics etc.) modify the biotic conditions of the soils. This particularly concerns the microorganisms which carry out the changes in the mineral and organic nitrogen compounds and the transformation of the external organic matter. The first aim of this work was to assess the influence of the sewage sediments and the manure on the phytosanitary potential of the soil environment. The second aim of this article was to estimate the number and activity of microorganisms which carry out the transformation of carbon and nitrogen compounds. This work showed the stimulating effect of the external organic matter both on the number and on the activity of most of the physiological groups. The manure mainly stimulated ammonificators, amylolitic microorganisms and Azotobacter sp. The sewage sediments mainly stimulated ammonificators, nitrifiers of I phase and cellulolytic microorganisms. The statistically significant impact of the physio-chemical soil habitat on the biological activity of the analyzed groups of microbes was also noted.

Download Full-text

Organic nitrogen uptake is a significant contributor to nitrogen economy of subtropical epiphytic bryophytes

Scientific Reports ◽

10.1038/srep30408 ◽

2016 ◽

Vol 6 (1) ◽

Cited By ~ 12

Author(s):

Liang Song ◽

Hua-Zheng Lu ◽

Xing-Liang Xu ◽

Su Li ◽

Xian-Meng Shi ◽

...

Keyword(s):

Nitrogen Uptake ◽

Organic Nitrogen ◽

Nitrogen Economy ◽

Significant Contributor ◽

Organic Nitrogen Uptake

Download Full-text

Dissolved inorganic and organic nitrogen uptake in the coastal North Sea: A seasonal study

Estuarine Coastal and Shelf Science ◽

10.1016/j.ecss.2014.05.022 ◽

2014 ◽

Vol 147 ◽

pp. 78-86 ◽

Cited By ~ 8

Author(s):

Alessia Moneta ◽

Bart Veuger ◽

Pieter van Rijswijk ◽

Filip Meysman ◽

Karline Soetaert ◽

...

Keyword(s):

North Sea ◽

Nitrogen Uptake ◽

Organic Nitrogen ◽

Seasonal Study ◽

Inorganic And Organic Nitrogen ◽

Inorganic And Organic ◽

Organic Nitrogen Uptake

Download Full-text

Responses of soil nitrogen dynamics in a Mojave Desert ecosystem to manipulations in soil carbon and nitrogen availability

Oecologia ◽

10.1007/s00442-002-1130-2 ◽

2003 ◽

Vol 134 (4) ◽

pp. 547-553 ◽

Cited By ~ 75

Author(s):

S. M. Schaeffer ◽

S. A. Billings ◽

R. D. Evans

Keyword(s):

Soil Carbon ◽

Soil Nitrogen ◽

Mojave Desert ◽

Nitrogen Availability ◽

Nitrogen Dynamics ◽

Desert Ecosystem ◽

Carbon And Nitrogen ◽

Soil Carbon And Nitrogen ◽

Soil Nitrogen Dynamics ◽

Carbon And Nitrogen Availability

Download Full-text

Organic nitrogen uptake and growth by the chrysophyte Aureococcus anophagefferens during a brown tide event

Marine Biology ◽

10.1007/s002270050178 ◽

1997 ◽

Vol 129 (2) ◽

pp. 377-387 ◽

Cited By ~ 125

Author(s):

G. M. Berg ◽

P. M. Glibert ◽

M. W. Lomas ◽

M. A. Burford

Keyword(s):

Nitrogen Uptake ◽

Organic Nitrogen ◽

Brown Tide ◽

Aureococcus Anophagefferens ◽

Organic Nitrogen Uptake

Download Full-text

Evidence for direct organic nitrogen uptake by plants using specific tracer proteins

Plant Nutrition ◽

10.1007/0-306-47624-x_102 ◽

2001 ◽

pp. 212-213 ◽

Cited By ~ 1

Author(s):

N. Koga ◽

M. Yamagata ◽

S. Matsumoto ◽

N. Ae

Keyword(s):

Nitrogen Uptake ◽

Organic Nitrogen ◽

Organic Nitrogen Uptake

Download Full-text

Modeling the effects of organic nitrogen uptake by plants on the carbon cycling of boreal forest and tundra ecosystems

Biogeosciences ◽

10.5194/bg-10-7943-2013 ◽

2013 ◽

Vol 10 (12) ◽

pp. 7943-7955 ◽

Cited By ~ 13

Author(s):

Q. Zhu ◽

Q. Zhuang

Keyword(s):

Boreal Forest ◽

Carbon Cycling ◽

Nitrogen Uptake ◽

Plant Uptake ◽

Boreal Forests ◽

Organic Nitrogen ◽

Tundra Ecosystem ◽

Ecosystem Production ◽

Tundra Ecosystems ◽

Organic Nitrogen Uptake

Abstract. Boreal forest and tundra are the major ecosystems in the northern high latitudes in which a large amount of carbon is stored. These ecosystems are nitrogen-limited due to slow mineralization rate of the soil organic nitrogen. Recently, abundant field studies have found that organic nitrogen is another important nitrogen supply for boreal forest and tundra ecosystems. In this study, we incorporated a mechanism that allowed boreal plants to uptake small molecular amino acids into a process-based biogeochemical model, the Terrestrial Ecosystem Model (TEM), to evaluate the impact of organic nitrogen uptake on ecosystem carbon cycling. The new version of the model was evaluated for both boreal forest and tundra sites. We found that the modeled organic nitrogen uptake accounted for 36–87% of total nitrogen uptake by plants in tundra ecosystems and 26–50% for boreal forests, suggesting that tundra ecosystem might have more relied on the organic form of nitrogen than boreal forests. The simulated monthly gross ecosystem production (GPP) and net ecosystem production (NEP) tended to be larger with the new version of the model since the plant uptake of organic nitrogen alleviated the soil nitrogen limitation especially during the growing season. The sensitivity study indicated that the most important factors controlling the plant uptake of organic nitrogen was the soil amino acid diffusion coefficient (De) in our model, suggesting that the organic nitrogen uptake by plants is likely to be regulated by the edaphic characteristics of diffusion. The model uncertainty due to uncertain parameters associated with organic nitrogen uptake of the tundra ecosystem was larger than the boreal forest ecosystems. This study suggests that considering the organic nitrogen uptake by plants is important to carbon modeling of boreal forest and tundra ecosystems.

Download Full-text