Nitrogen cycling
Response of the abundance of key soil microbial nitrogen-cycling genes to multi-factorial global changes.
... soil nitrogen cycling processes, which are mainly mediated by ...various nitrogen-cycling functional groups will respond differently to such environmental changes, very little is known about ...
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Recurrent winter warming pulses enhance nitrogen cycling and soil biotic activity in temperate heathland and grassland mesocosms
... emphasize the importance of temperature variability, plant performance, and frost dam- age in a warmer world for nitrogen cycling and nitrogen losses from ecosystems. Acknowledgements. This study was ...
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Silvopastoral systems drive the nitrogen-cycling bacterial community in soil
... system, nitrogen (N) is supplied by symbiosis between legumes and ...free-living nitrogen-fixing bacteria, which possess nifH genes, which encode nitrogenase ...
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Biochar decelerates soil organic nitrogen cycling but stimulates soil nitrification in a temperate arable field trial.
... (representing a labile part of the total protein pool in soils) is mainly fuelled by microbial turnover and protein desorption processes while efflux from this pool relates to protein depolymer- ization or protein ...
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Carbon and nitrogen cycling in a tropical Brazilian soil cropped with sugarcane and irrigated with wastewater
... Treated sewage effluent (TSE) is increasingly used as a source of water and nutrients (mainly nitrogen) in crop production in Brazil (da Fonseca et al., 2007a). However, the country lacks a long-term tradition on ...
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The Link between Microbial Diversity and Nitrogen Cycling in Marine Sediments Is Modulated by Macrofaunal Bioturbation.
... Samples for microbial analysis were collected in April (phytoplankton bloom), June (shortly after mass sedimentation of the spring bloom) and September (high mineralization rate; [1]). No specific permits for sampling ...
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Carbon and nitrogen cycling in an integrated soybean‑beef cattle production system under different grazing intensities
... 1993), cycling of plant and animal residues becomes an important source for maintaining soil-plant-atmosphere equilibrium, since it contributes for nutrient supply both for pasture and cash crops (Dubeux et ...
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Modelling changes in nitrogen cycling to sustain increases in forest productivity under elevated atmospheric CO<sub>2</sub> and contrasting site conditions
... in nitrogen uptake rather than nitrogen-use efficiency support higher rates of temperate forest productivity under elevated CO 2 , PNAS, 104, 14014–14019, ...
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Tightly-Coupled Plant-Soil Nitrogen Cycling: Comparison of Organic Farms across an Agricultural Landscape.
... ered an indicator for N loss potential [5,72,73]. Results from a companion study support the idea that soil microbes were C rather than N-limited in these fields, showing higher potential activities of C-cycling ...
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Spatiotemporal analysis of nitrogen cycling in a mixed coniferous forest of the northern United States
... Abstract. Nitrogen (N) is the limiting nutrient to primary productivity in a variety of temperate forests, and N cy- cling is undergoing a variety of anthropogenic changes, no- tably a doubling of reactive N (Nr) ...
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The effects of warming and nitrogen addition on soil nitrogen cycling in a temperate grassland, northeastern China.
... Both warming and N addition enhanced soil N mineralization in the three consecutive years with fluctuating precipitation in the temperate grassland. Contrary to our prediction, combined warming and N addition produced a ...
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Differential nitrogen cycling in semiarid sub-shrubs with contrasting leaf habit.
... Nitrogen (N) is, after water, the most limiting resource in semiarid ecosystems. However, knowledge on the N cycling ability of semiarid woody plants is still very rudimentary. This study analyzed the ...
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Nitrous oxide fluxes and nitrogen cycling along a pasture chronosequence in Central Amazonia, Brazil
... Surface soil (10 cm depth) was sampled once during the rainy season (April–May) and once during the dry season (September–October) of 2000. Soil cores were taken ad- jacent to 4 chambers with a root corer of 7 cm ...
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Geomorphic control on the δ<sup>15</sup>N of mountain forests
... particulate nitrogen from ...on nitrogen budgets remains poorly ...investigate nitrogen cycling in the moun- tain forest of Taiwan, from 24 sites with distinct geomorphic (topographic slope) ...
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Nitrogen mass balance in the Brazilian Amazon: an update
... high nitrogen fixation occurring in these ecosystems, may also become rich in reactive nitrogen produced by ...earlier nitrogen mass balance survey carried out in the region, biological ...
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Nitrate-Nitrogen Content in Soil and Lysimeter Water under Different Nitrogen Fertilization Levels in Crop Production
... erent nitrogen fertilization levels, whence quantities of phosphorus (P) and potassium (K) were constant for all treat- ments (120 kg P ha -1 and 180 kg K ha -1 ...
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Nitrogênio e potássio no cultivo do capim-piatã em solo do Cerrado brasileiro
... between nitrogen and potassium for increased production is due to the potassium function of enzymatic activation of the photosynthesis processes and action in the synthesis of proteins, functions related to ...
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Recent advances in the biogeochemistry of nitrogen in the ocean
... tant aspects of the marine nitrogen cycle, there are a number of fundamental issues that remain unresolved. Therefore, a broad synthesis of the current state of our knowl- edge is both timely and necessary as it ...
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Most networks in Wagner's model are cycling.
... Wagner [8,10] introduced a version of this gene network model to study the evolution of genetic robustness. The gene network is represented by a dynamical system whose state variables correspond to expression levels of ...
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Egeson's (George's) transtridecadal weather cycling and sunspots
... In the late 19th century, Charles Egeson, a map compiler at the Sydney Observatory, carried out some of the earliest research on climatic cycles, linking them to about 33-year cycles in [r] ...
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