Returning straw to the field is an effective method for optimizing soil phosphorus (P) availability, in which bacteria play important role. However, effects of various incorporation strategies on P transformation between different pools remain unclear. In this study, variations fractions, phosphatase activities and abundance genes (phoD, phoX phoC) as well a P-solubilizing gene (pqqC) at DNA (t...

Anthropogenic activities have increased phosphorus (P) inputs to most aquatic and terrestrial ecosystems. However, the relationship between plant nutrient resorption and P availability is still unclear, and much less is known about the underlying mechanisms. Here, we used a multi-level P addition experiment (0, 1.2, 4.8, and 9.6 g P m(-2) year(-1)) to assess the effect of P enrichment on nutrie...

A method employing dual competitive ligand exchange followed by solid phase extraction (CLE-SPE) for characterizing the complexation of inorganic Hg(II) in natural waters is described. This method employs parallel use of two competing ligands: diethyldithiolcarbamate (DEDC), which forms hydrophobic complexes with Hg(II), and thiosalicylic acid (TSA), which forms hydrophilic complexes with Hg(II...

Effects of eutrophication on arsenic speciation were studied in eutrophic Lake Kiba and mesotrophic Lake Biwa, Japan. By combining hydride generation atomic absorption spectrometry with ultraviolet irradiation, inorganic, methyl and ultraviolet-labile fractions of arsenic were determined. In both Lakes, inorganic species (As(V+III)) dominated over other forms of arsenic all the year round. Most...

Phosphorus (P) is the restraining aspect in forest ecosystem, particularly temperate regions, and makes ecosystem more liable to nitrogen (N)-derived acidification. However, it remains poorly understood how N P fertilization together affects soil-P availability other soil properties. To address this question, a factorial experiment was conducted with additions under two ecosystems, i.e., Korean...

Information on the forms of P present in animal manure may improve our ability to manage manure P. In most investigations of manure P composition, only inorganic and total P are determined, and the difference between them is assigned as organic P. In this study, we explored the possibility of identifying and quantifying more specific organic P forms in animal manure with orthophosphate-releasin...

Using a box-sampler, surface and core sediment samples were collected from the Bohai and Yellow Seas in 1998e1999. The sediments were sequentially extracted to determine six phosphorus fractions, and non-sequentially extracted for total P (TP) and inorganic P (IP), where the difference between TP and IP was assumed to be organic P (OP). It was found that more than 70% of the total P is inorgani...

Abstract The purpose of the work detailed here was to determine impact distribution natural organic matter and grain size on resources mobile phosphorus in bottom sediments small reservoirs located catchments subject different levels anthropopressure. research objects were five southeast Poland. In retention reservoirs, it is anthropogenic catchment its geological structure, a lesser extent sed...

The western region of the southern Pantanal is characterised by soils with high phosphorus (P) contents, derived from materials surrounding lithostratigraphic units, accumulated fluvial transport. However, studies on forms and availability P in these are scarce. objective this study was to evaluate different inorganic their relationship some attributes carbonatic Mato Grosso do Sul, Brazil. Hed...