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Phosphorus uptake of upland rice genotypes as affected by organic matter application in phosphorus deficient soils: a physiological and agronomic approach KU Leuven
Phosphorus (P) deficiency is a major yield-limiting factor for upland rice in regions where highly weathered, acid soils prevail. Such soils contain large concentrations of iron- and aluminum hydroxides that strongly immobilize phosphate (PO4). Breeding P-efficient rice genotypes may offer an option to overcome P deficiency. The P uptake capacity of a plant under low P availability, termed P acquisition efficiency (PAE), can be enhanced by (i) ...
The bioavailability of colloidal and dissolved organic phosphorus to the alga Pseudokirchneriella subcapitata in relation to analytical phosphorus measurements KU Leuven
The speciation of phosphorus (P) in freshwater affects its bioavailability. Analytical detection methods were compared for different colloidal and dissolved organic forms of phosphorus (P) in relation to the potential P bioavailability to Pseudokirchneriella subcapitata, determined with a 14 day growth response to P. Growth on these P-forms was referenced to supplies of inorganic P (Pi) as operational definition of the relative potential ...
Bioavailability of organic phosphorus to Pseudokirchneriella subcapitata as affected by phosphorus starvation: An isotope dilution study KU Leuven
Phosphorus (P) starved algae have a capacity to rapidly take up P when resupplied to P. This study was set-up to measure to what extent P starvation enhances the potential of algae to utilize organic P forms. The initial (<0.5 h) PO4 uptake rates of cells of Pseudokirchneriella subcapitata increased up to 18-fold with increasing starvation. Algae from different levels of P starvation were subsequently exposed to different model organic P ...
Organic phosphorus in the terrestrial environment: a perspective on the state of the art and future priorities Universiteit Hasselt
The dynamics of phosphorus (P) in the environment is important for regulating nutrient cycles in natural and managed ecosystems and an integral part in assessing biological resilience against environmental change. Organic P (P-o) compounds play key roles in biological and ecosystems function in the terrestrial environment being critical to cell function, growth and reproduction. We asked a group of experts to consider the global issues ...
Phosphorus/carbon decoupling: returning organic matter to the soil through phosphorus removal from manure Universiteit Gent
The role of soil organic matter on the long-term availability of phosphorus in agricultural soils KU Leuven
Decades of excessive use of phosphorus (P) fertilisers in agriculture resulted in large soil P reserves in arable soils. This historical over-fertilisation contrasts with the impending scarcity of natural mineral P resources and with the adverse environmental effects due to losses of P to the natural environment; for these reasons, the reservoirs of soil P are often denoted as the legacy P. To reduce these environmental effects, fertilisation ...
Response of Afromontane soil organic carbon, nitrogen, and phosphorus to in situ experimental warming along an elevational gradient Universiteit Gent
Tropical montane forests store large amounts of carbon (C), nitrogen (N), and phosphorus (P) in soil. These soil C, N, and P pools are vulnerable to increased losses due to the increasing local temperatures. To gain better insight into the effects of climate warming on biogeochemistry in montane forests in Africa, we established study plots along a natural climate gradient in Uganda between 1,250 and 3,000 m in the Rwenzori Mountains. We studied ...
Soil phosphorus (P) mining in agriculture : impacts on P availability, crop yields and soil organic carbon stocks Universiteit Gent
Soil phosphorus (P) leaching is one of the major causes of diffuse P losses towards the environment in north-west Europe. In order to cut back these P losses over the long term, soil P stocks need to be drastically reduced. Greenhouse experiments have shown that a rapid reduction of the plant available P pool is attained by reducing the P fertilizer input to zero while cropping, but field trials confirming these findings are rare. Moreover, ...