Does soil nutrient availability influence night-time water flux of aspen saplings?

2012 ◽  
Vol 82 ◽  
pp. 37-42 ◽  
Author(s):  
Priit Kupper ◽  
Gristin Rohula ◽  
Liina Saksing ◽  
Arne Sellin ◽  
Krista Lõhmus ◽  
...  
Keyword(s):  
Nutrient Availability ◽  
Water Flux ◽  
Soil Nutrient ◽  
Night Time ◽  
Soil Nutrient Availability

scholarly journals One Year Residual Effect of Sewage Sludge Biochar as a Soil Amendment for Maize in a Brazilian Oxisol

2021 ◽  
Vol 13 (4) ◽  
pp. 2226
Author(s):  
Joisman Fachini ◽  
Thais Rodrigues Coser ◽  
Alyson Silva de Araujo ◽  
Ailton Teixeira do Vale ◽  
Keiji Jindo ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Grain Yield ◽  
Nutrient Availability ◽  
Pyrolysis Temperature ◽  
Residual Effect ◽  
Soil Nutrient ◽  
Mineral Fertilizer ◽  
Corn Yield ◽  
Soil Nutrient Availability ◽  
One Year

The thermochemical transformation of sewage sludge (SS) to biochar (SSB) allows exploring the advantages of SS and reduces possible environmental risks associated with its use. Recent studies have shown that SSB is nutrient-rich and may replace mineral fertilizers. However, there are still some questions to be answered about the residual effect of SSB on soil nutrient availability. In addition, most of the previous studies were conducted in pots or soil incubations. Therefore, the residual effect of SSB on soil properties in field conditions remains unclear. This study shows the results of nutrient availability and uptake as well as maize yield the third cropping of a three-year consecutive corn cropping system. The following treatments were compared: (1) control: without mineral fertilizer and biochar; (2) NPK: with mineral fertilizer; (3) SSB300: with biochar produced at 300 °C; (4) SSB300+NPK; (5) SSB500: with biochar produced at 500 °C; and (6) SSB500+NPK. The results show that SSB has one-year residual effects on soil nutrient availability and nutrient uptake by maize, especially phosphorus. Available soil P contents in plots that received SSB were around five times higher than the control and the NPK treatments. Pyrolysis temperature influenced the SSB residual effect on corn yield. One year after suspending the SSB application, SSB300 increased corn yield at the same level as the application of NPK. SSB300 stood out and promoted higher grain yield in the residual period (8524 kg ha−1) than SSB500 (6886 kg ha−1). Regardless of pyrolysis temperature, biochar boosted the mineral fertilizer effect resulting in higher grain yield than the exclusive application of NPK. Additional long-term studies should be focused on SSB as a slow-release phosphate fertilizer.

Nutrient use strategy and not competition determines native and invasive species response to changes in soil nutrient availability

2021 ◽  
Author(s):  
Amanda E. Knauf ◽  
Creighton M. Litton ◽  
Rebecca J. Cole ◽  
Jed P. Sparks ◽  
Christian P. Giardina ◽  
...  
Keyword(s):  
Invasive Species ◽  
Nutrient Availability ◽  
Soil Nutrient ◽  
Soil Nutrient Availability ◽  
Species Response ◽  
Nutrient Use

Conocarpus Biochar Induces Changes in Soil Nutrient Availability and Tomato Growth Under Saline Irrigation

Pedosphere ◽  
2016 ◽  
Vol 26 (1) ◽  
pp. 27-38 ◽  
Author(s):  
Adel Rabie A. USMAN ◽  
Mohammad I. AL-WABEL ◽  
Yong S. OK ◽  
Abdulaziz AL-HARBI ◽  
Mahmoud WAHB-ALLAH ◽  
...  
Keyword(s):  
Nutrient Availability ◽  
Soil Nutrient ◽  
Soil Nutrient Availability ◽  
Saline Irrigation ◽  
Tomato Growth

Logging impacts on the biogeochemistry of boreal forest soils and nutrient export to aquatic systems: A review

2008 ◽  
Vol 16 (NA) ◽  
pp. 157-179 ◽  
Author(s):  
David P. Kreutzweiser ◽  
Paul W. Hazlett ◽  
John M. Gunn
Keyword(s):  
Boreal Forest ◽  
Nutrient Availability ◽  
Soil Nutrient ◽  
Soil Conditions ◽  
Soil Nutrient Availability ◽  
Clear Cutting ◽  
Partial Harvest ◽  
Forest Watersheds ◽  
Logging Impacts ◽  
Receiving Waters

Logging disturbances in boreal forest watersheds can alter biogeochemical processes in soils by changing forest composition, plant uptake rates, soil conditions, moisture and temperature regimes, soil microbial activity, and water fluxes. In general, these changes have often led to short-term increases in soil nutrient availability followed by increased mobility and losses by leaching to receiving waters. Among the studies we reviewed, dissolved organic carbon (DOC) exports usually increased after logging, and nitrogen (N) mineralization and nitrification often increased with resulting increased N availability and exports to receiving waters. Similar processes and responses occurred for phosphorus (P), but to a lesser extent than for N. In most cases, base cations were released and exported to receiving waters after logging. Several studies demonstrated that stem-only or partial-harvest logging reduced the impacts on nutrient release and exports in comparison to whole-tree clear-cutting. Despite these logging-induced increases in soil nutrient availability and movement to receiving waters, most studies reported little or no change in soil chemical properties. However, responses to logging were highly variable and often site specific. The likelihood, extent and magnitude of logging impacts on soil nutrient cycling and exports in boreal forest watersheds will be dependent on soil types, stand and site conditions, hydrological connectivity, post-logging weather patterns, and type and timing of harvest activities. Additionally, logging impacts can interact with, and be confounded by, atmospheric pollutant deposition and climate change. Further watershed-level empirical studies and modeling efforts are required to elucidate these interactions, to improve predictive capabilities, and to advance forest management guidelines for sustaining forest soil productivity and limiting nutrient exports.

scholarly journals Seasonal variation in AMF colonisation, soil and plant nutrient content in gypsum specialist and generalist species growing in P-poor soils

2021 ◽  
Author(s):  
Andreu Cera ◽  
Estephania Duplat ◽  
Gabriel Montserrat-Martí ◽  
Antonio Gómez-Bolea ◽  
Susana Rodríguez-Echeverría ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Nutrient Availability ◽  
Soil Nutrient ◽  
Nutrient Status ◽  
Nutrient Content ◽  
P Availability ◽  
Plant Nutrient ◽  
Rhizospheric Soil ◽  
Soil Nutrient Availability ◽  
Generalist Species

Abstract Aims Gypsum soils are P-limited atypical soils that harbour a rich endemic flora. These singular soils are usually found in drylands, where plant activity and soil nutrient availability are seasonal. No previous studies have analysed the seasonality of P nutrition and its interaction with the arbuscular mycorrhiza fungi (AMF) colonisation in gypsum plants. Our aim was to evaluate the seasonal changes in plant nutrient status, AMF colonisation and rhizospheric soil nutrient availability in gypsum specialist and generalist species. Methods We evaluated seasonal variation in the proportion of root length colonised by AMF structures (hyphae, vesicules and arbuscules), plant nutrient status (leaf C, N and P and fine root C and N) and rhizospheric soil content (P, organic matter, nitrate and ammonium) of three gypsum specialists and two generalists throughout a year. Results All species showed arbuscules within roots, including species of Caryophyllaceae and Brassicaceae. Root colonisation by arbuscules (AC) was higher in spring than in other seasons, when plants showed high leaf P-requirements. Higher AC was decoupled from inorganic N and P availability in rhizospheric soil, and foliar nutrient content. Generalists showed higher AC than specialists, but only in spring. Conclusions Seasonality was found in AMF colonisation, rhizospheric soil content and plant nutrient status. The mutualism between plants and AMF was highest in spring, when P-requirements are higher for plants, especially in generalists. However, AMF decoupled from plant demands in autumn, when nutrient availability increases in rhizospheric soil.

Sign in / Sign up

Export Citation Format

Share Document