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- W2566852022 abstract "A field experiment was carried out at El- Ismailia Agriculture Research Station Farm in Ismailia Governorate, Egypt. The institute farm is located at 30° 35´41.9 N Latitude and 32° 16´ 45.8 E longitude during two successive winter seasons cultivated with Green Pea (Pisum sativum L.) crop grown on sandy soil under drip irrigation system to evaluate the possible use of rock phosphate in agriculture through partially acidulation with different concentration (the organic and mineral acids were added with three concentrations i.e. 5 ,10 and 20 % ) (C1, C2 and C3). Acidulation with organic acids (humic, fulvic and citric) as compared to mineral acids ( sulfuric), sulfur and compost extract on phosphorus release from rock phosphate(15 % P2O5) as compared to super phosphate(15 % P2O5) and their reflection on soil chemical properties and yield production of Green Pea. Results show that acidulation both of rock phosphate and super phosphate caused a significant decrease in soil pH as compared to control treatments (superphosphate only without acidulation) or rock phosphate only , also acidulated rock phosphate was superior for decreasing the soil pH as compared to superphosphate . Moreover, pH values decreased significantly along with increasing the concentration of acids, while all applied treatments increased the soil EC and nutrient availability ( N, P and K) as compared to control treatment. This trend was more pronouns for rock phosphate as compared to superphosphate. With respect to the different acidulates, for both super and rock phosphate the sulfuric and fulvic acid were superior for securing a maximum availability of nutrient (N, P and K) as compared to the control and other treatments .The treatments arranged as follow ; sulfuric acid, fulvic acid, humic substance , sulfur ,citric acid and compost extract. Data also indicated that yield components (straw, pods and biological yield) of green pea crop increased significantly due to application of different acidulated treatments for superphosphate and rock phosphate as compared to control treatment at both tested season. Generally, acidulated rock phosphate was superior as compared to super phosphate in dry matter yield. Acidulation both of rock phosphate and super phosphate with sulfuric and fulvic acid was the superior for increasing the nutrient uptake and yield components. Also, phosphorus uptake increased with each increase in concentration of acids, also both yield and P- uptake for rock phosphate were higher when the pH decreased. Generally, Positive relationship was responded between the availability of nutrients in the soil and the uptake of nutrients with acidulation. Also, acidulation of both super phosphate and rock phosphate enhance the Phosphorus use efficiency of Pea yield especially for rock phosphate. Generally increasing the concentration of acids cause a significant increase in phosphorus use efficiency, the highest phosphorus use efficiency was obtained in presence of sulfuric and fulvic acid for both P- sources super phosphate and rock phosphate as compared to the other treatments, the opposite trend was obtained in presence of citric acid and compost extract. Finally, we can concluded that uses of acidulated rock phosphate became a pronounce alternative phosphate fertilizers because of its effect on increasing the availability of P, nutritional status and yield of green pea on certain Egyptian soil." @default.
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- W2566852022 date "2015-01-01" @default.
- W2566852022 modified "2023-09-27" @default.
- W2566852022 title "Studies on the Possible use of Rock phosphate in Agriculture" @default.
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