اثر عدم آبیاری در برخی مراحل رشد و محلول‏پاشی سولفات‏روی بر غلظت عناصر مختلف در ذرت دانه‏ای هیبرید سینگل‏کراس 704 در شرایط آب و هوایی خوزستان

In order to study the effects of irrigation-off at some growth stages and zinc sulfate spraying on the concentration of different elements in corn hybrid K.S.C 704, an experiment was done in summer 2011-2012 in the form of split plot based on randomized complete block design (RCBD) with three replications. The main factor included irrigation with three levels (complete irrigation (control), irrigation-off at tasseling stage, and irrigation-off at milking stage). The second factor included zinc sulfate spraying with four levels of (without spraying, spraying at the stage of eight leaves, spraying at the stage of twelve leaves and simultaneous spraying at the stages of eight and twelve leaves). The results indicated that the highest concentration of Zn, K, Fe, P, and Na of the grain is related to the irrigation-off at the tasseling stage and the least concentration was at the complete irrigation stage. In general, irrigation treatment had no significant effect on the concentration of measured elements, while zinc sulfate spraying significantly increased the concentration of Zn, P, and Mn of the grain. It seems that with the consumption of Zn, the plant ability to regulate the amounts of Zn, N, and P increases so that they will be absorbed at the right amount by the roots and will be sent to above ground parts but because of the negative interaction of Zn and Mn, with the increase in Zn in grain, the Mn concentration decreases