Inorganic Phosphorus Fractionation of Highly Calcareous Soils of Iran

Kinetics of phosphorus forms applied as inorganic and organic amendments to a calcareous soil II: effects of plant growth on plant available and uptake phosphorus

“…This fraction is comparable to Olsen-P (plant available P), which is the soil P test accredited for soils in Ontario. The proportion of total P as organic P in the soil was 55% which is typical for soils in this region, and most of the organic P was extracted with CD and therefore considered occluded (Adhami et al, 2006). Plant biomass response to applied P would be expected and was observed.…”

Distribution of inorganic phosphorus fractions in some soil profiles of Zagros forest of Iran

“…Although inorganic P fractionation in highly calcareous soils of Iran has been studied (Adhami et al 2006;Mostashari et al 2008;Khanmirzaei et al 2009) little attention has been paid to the distribution of inorganic P fractions in the soil profile of natural ecosystems, where subsurface P might be important in ecosystem's sustainability. One of such natural ecosystems is Zogros forest, which is under an international biodiversity conservation project.…”

“…Generally, inorganic P consists of four main fractions including readily soluble; Aland Fe-P; occluded P and Ca-P (Chang & Jackson 1957;Adhami et al 2006). Abundance and distribution of these fractions depend on the degree of soil development (Walker & Syers 1976;Negassa & Leinweber 2009).…”

Effects of phosphorus and seed priming on seed vigor, fatty acids composition and heterotrophic seedling growth of black seed (Nigella sativa L.) grown in a calcareous soil

“…In other words, P availability is one of the most crucial environmental factors (Koocheki et al, 2014), affecting seed P content (Fujita et al, 2013). On the other hand, considering the vital role of lipids and proteins in seed germination and seedling establishment Soltani et al, 2002), improving nutritional status of mother plants in terms of P uptake, especially in arid and semi-arid regions, where calcareous soils are prevalent (Adhami et al, 2006), would improve the seed vigor and seedling heterotrophic growth.…”