EVALATION OF SOME PHOSPHATE FERTILIZERS EFFICIENCY IN THEIR PHOSPHORUS AVAILABILITY AND YIELD OF WHEAT IN TWO DIFFERENT SOIL TEXTURE | ||
| Euphrates Journal of Agriculture Science | ||
| Article 1, Volume 6, Issue 1, February 2014, Pages 173-190 | ||
| Abstract | ||
| Two experiments were used in this study, The first was conducted to evaluate the efficiency of three types of phosphate fertilizers (NP , DAP and TSP) in their ability of P release in two soils (clay and sandy loam texture). The first was incubated for 10 periods and the biological experiment was conducted to evaluate fertilizer P use efficiency in yield of wheat. It consisted of five rates of P (0 , 60 ,120, 180 and 240 Kg P2O5 ha-1), three types of fertilizers and two soils. Randomized complete block design (RCBD) with three replicates was used for both two experiments. The results showed that P release was decreased as the incubation period increased for all fertilizers and both soils. DAP was more efficient as compared with TSP and NP, P release efficiency of these fertilizers were as follow: DAP > TSP > NP. P release in clay soil significantly increased by 17% as compared with sandy loam soil. The results showed also that all plant parameters statistically increased as the rate of P applied increased from 0 to 240 Kg P2O5 ha-1. 180 Kg P2O5 ha-1 level gave the highest values for all plant parameters. DAP was the best as compared with TSP and NP fertilizers and their P use efficiency were 47.85, 33.37 and 19.85% for DAP, TSP and NP respectively. All plant parameters increased in clay soil in relative to sandy loam soil. Quadratic equation was the best for describing the relationship between added DAP, TSP fertilizers and all plant parameters while linear equation was the best for NP fertilizer. | ||
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