Response of wheat to NP-acid-type fertilizers application in calcareous soils
Abstract: Improving the nitrogen and phosphorus fertilizers-use efficiency in the arid and semi-arid areas exhausts more efforts from soil scientists. Also, the problems of NP management in calcareous soils are more complicated. Using the acid-type NP fertilizer sources in these soils added some advantages on nitrogen application. The objectives of this greenhouse pot experiments concentrated on evaluating and comparing the agronomic effectiveness of urea-phosphate (UP) with urea or other NP sources on the wheat yield and yield components as well as the on the N and P uptake efficiencies by wheat grown in two types of calcareous soils.
NP treatments increased both the spike number and spike weight per pot especially UP and U+H3PO4 treatments. The grain and straw yield increased significantly with UP and U+H3PO4 application in both soils. These treatments produced the highest straw yield when associated with sulphur. The result indicates that the associated acidity to urea influenced the improvement of yield and yield component. The results of N and P uptake by grains showed that UP treatment increased N uptake comparing with other NP applications. P uptake by wheat grain was affected by the treatments, soil type and S application. Although the higher carbonate content of El-Banger soil (36.63 %), the available P in the 20-cm surface soil (after harvest) was higher than that was obtained from Abis (3.41 % CaCO3) soil. This result reflects the importance of surface reactivity of solid phases in their influence on P pathway in the soil
Publication year 1998
Pages 481-488
Availability location Soils, Water and Environment Research Institute, ARC
Availability number
Organization Name
serial title International Symposium on Arid Region Soils. 21-24 September
Department Soil Salinity and Alkalinity Res. Lab.
Author(s) from ARC
External authors (outside ARC)
    ماهر السيد صالح قسم الأراضى والمياه – كلية الزراعة جامعة الإسكندرية
Agris Categories Soil fertility
AGROVOC
TERMS		 Nitrogen fertilizers. Phosphate fertilizers. Soil chemistry. Wheats.
Publication Type Conference/Workshop
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