Response of T. aestivum L. varieties to phosphorus fertilization with different phosphate sources. I. Effect on grain yield in the year of direct action
2004
Nankova, M. | Tsenov, N. | Kostov, K. (Dobrudzha Agricultural Institute, General Toshevo (Bulgaria))
Wheat productivity is strongly affected by the phosphorus form in the tested phosphate sources. Maximum productivity according to the control variants was registered after fertilization with triple superphosphate.The highest total productivity was established in the varieties Kristy, Svilena and Miryana after fertilization with refuse dipotassium phosphate. In the tested genotypes, this phosphate source increased wheat productivity to a highest degree after the use of triple phosphate, and in some genotypes it exceeded this fertilizer. During the year of direct effect of the P-containing fertilizers the obtained yields were between 50 and 80% of the total yield depending on the type of the variety and the nitrogen fertilization.Nitrogen fertilization definitely increased the efficiency of the used phosphorus fertilizers. Its effect was more evident in the year of direct action of the tested phosphate sources.
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