Effect of organic and inorganic phosphorus application on some chemical properties and soil phosphorus fractions [electronic resource].

Includes reference.

Two successive cultivation seasons (winter season 2006/2007 and summer season 2007) were conducted in field experiments on silty clay loam soil at EIGemmeiza Agricultural Research Station, EI-Gharbia Governorate. The experiment was designed using a randomized complete block design with three replicates to study the effect and residual effects of organic and inorganic phosphorus using farmyard manure (FYM) as a source of organic phosphorus, rock phosphate (RP) and supper phosphate (SP) as a source of inorganic phosphorus On some soil chemical properties and phosphorus fractions. Furthermore, economical analysis was done by calculating the net income. The obtained results can be summarized as follows:- 1-The use of organic and inorganic phosphorus lead to a slightly decreases in soil reaction (pH) and progressive increases in soil salinity (EC), soluble ions (Ca, Mg, Na, HCO₃, CI and SO₄), total soluble salts (TSS) and sodium adsorption ratio (SAR). 2-The mean values in the two seasons showed that theeffeet of organic;; phosphorus (FYM) on soil chemical properties was more pronounced than the effect of inorganic phosphorus additions (rock phosphate and supper phosphate). . 3-The distriibution values of inorganic P, Le., easily soluble P (Iabile-P fraction), AI-P fraction, Fe-P fraction and Ca-P fraction were increased with increasing the addition of OP with RP and SP. Also, the labile-P fraction, AI-P fraction and Fe-P fraction as a percent of the total P were increased by increasing all added treatments, except the Ca-P fraction as a percent of total P which was decreased with increasing all added treatments.

Summary in Arabic.

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