The effects of interaction between the elements phosphorus and zinc are some traits of soybean cultivars of sari

Phosphorus (P) and Zinc (Zn) are the essential elements for plants that have various effects on different plants. In order to study of P and Zn interactions on soybean, a pot experiment was conducted as factorial trial was arranged in a completely randomized design with three replications in 2011. Factors tested included three levels of P (0, 50 and 100 mg.kg) of Triple super phosphate, three levels of Zn (0, 5 and 10 mg.kg) of zinc sulphate. Mean comparisons of P effect showed that leaf and seed P concentrationsignificantly increase and leaf and shoot Zn concentration significantly decrease with increasing of P levels, but had no significant effect on seed protein and seed Zn concentration. Maximum seed oil was obtained in 50 mg.kg P level. Mean comparisons of Zn effect showed that leaf, shoot and seed Zn concentration significantly increase and seed P concentration significantly decrease with increasing of Zn levels but had no significant effect on leaf P concentration, seed protein and seed oil. The highest P concentration in the seed was obtained with 100 mg.kg P and 5 mg.kg Zn treatments and the highest zinc concentration in the seed was obtained with 50 mg.kg P and 10 mg.kg Zn treatments. In conclusion, interaction of these elements had various effects on quality characteristics of soybean and balance Application of P and Zn in soil increases of these elements and oil in plant.