JOURNAL ARTICLE

Nutrient concentration in wheat and soil under allelopathy treatments

Nayer Mohammadkhani, Moslem Servati
Journal of Plant Research 2018, 131 (1): 143-155
29082451
Allelopathy is related to soil nutrient availability and allelochemicals can change the soil and therefore the plant nutrient status. Wheat is one of the most important crops for the production of human food in the world. Alhagi maurorum and Cardaria draba are the most important weeds in wheat fields. We performed experiments to assess the allelopathic effect of A. maurorum and C. draba shoots on mineral nutrient concentrations in pot-grown wheat plants and soil. The presence of dry powder of A. maurorum and C. draba shoots reduced concentrations of macronutrients (NO3 - , K+ , Ca2+ and P) and micronutrients (Fe2+ and Cu2+ ) in roots and shoots of wheat plants, whereas it did not affect concentrations of Mg2+ , Mn2+ and Zn2+ . Allelopathic effect of A. maurorum was significantly greater than that of C. draba. There was a significantly positive correlation between wheat growth and ion concentration. There was a significantly negative correlation between the soil nutrient concentration and plant nutrient concentration across the treatments. These results suggest that allelopathy increases the nutrient availability in the soil because of the decrease in absorption by plants.

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