Study on Rate and Method of Micronutrients Application in Canola Field

Factorial experiments in randomized complete block design were conducted with three replications in Safi-Abad Dezful, Ardabil, Bushehr, Semnan, Fars, Kerman, Kermanshah, Lorestan, and Iranshahr to determine best rate, method of fertilizer soil application and foliar application of micronutrients. Two additional treatments were considered as control (without the use of micronutrients) and foliar application treatment without applying micronutrient fertilizer in soil. Micronutrients levels and source were Fe as Fe2SO4 (75 and 150 kg ha-1), Zn as ZnSO4 (40 and 80 kg ha-1), B as H3BO3 (10 and 20 kg ha-1),Cu as Cu2O4 (20 and 40 kg ha-1), Mn as MnSO4 (40 and 80 kg ha-1), Mg as MgSO4 (100 and 200 kg ha- 1), respectively. Foliar application concentrations were 3g/lit-1 for Zn and B and 5 g/lit-1 for Mn in two stages after rosette and in the flowering.This experiment was carried out in Kermanshah on Zn and B. In Islamabad soils had 1.8mg.kg-1 Zn , 0.44 mg/kg B and in Mahidasht station soil had 0.48Zn and 0.75B mg/kg soils. The results in the Islamabad showed that there was not significant difference between treatments. The highest yield were observed in soil application of 40 kg ha-1 ZnSO4 with its foliar application and application of 40 kg. Ha-1 as banding. .Yield have been changed significantly in Mahidasht station significantly.. and the highest yield were obtained by using 40 kg.ha-1 ZnSO4. Due to the higher amount of available soil B in Mahidasht research station to Islamabad, B concentrations in seed was significantly higher in Mahidasht research station. The experiment was conducted in Orzoeih Kerman with intial avalable of Fe 3 and Zn 0.72 mg.kg-1. Soil application of Fe as bradcasting increased yield significantly. But foliar application and banding could not caused significant changes. the same trend was followed for Zn. The effect of FeSo4 application were tested in Bushehr for two years in soils with Fe available 3.0 (first year) and 4.8 mg.kg-1 (second year). Statistical analysis showed that the treatments had not significant effect on yield in the first year. But crop yield have been changed significantly for the main factor of spraying and interactions of rates and soil applicatin method and also interactions of soil application method and spraying in the second year Spraying could increased grain yield and oil in the second year The effect of applying Zn, Fe and Mn fertilizers were examined in Darab-Fars. In the first year, application method could not changed yield significantly in any of the 3 micronutrients. The second Mn levels could provided a significant increasing yield.and also FeSO4 spraying could significantly increased yield.. the consumption rate and method of apllication for 3 elements were not significant In the second year.But foliar application could create significant changes for all 3 elements. Spraying could increased grain yield and oil in the second year In Shahrod the study of FeSO4 application on canola yield indicated that Seed yield and oil yiled were incresed with soil application of FeSO4 as banding in soil with initial availble Fe 4.7 mg.kg- 1.But this change was not significant for oil percent. Although spraying caused increase in the yield, but this change was not significant.The effecs of ZnSO4 in Safi Abad Dezful were carried out in two field for frist year and in a field in the second year. The results showed that significant differences exist between 8 4 treatments and the highest yield were obtained from the first level of soil applicatin as banding with spraying of Zn in the Agro-industry Shahid Rajai (available Zn 0.88 mg. Kg-1) and in SafiAbad Agriculture Research Center (available Zn 0.72 mg.kg-1) the second level of soil application as banding with Zn spraying was the best treatment. But in the second year the highest yield was obtained with the first level of the banding and spraying. Two elements(Fe and Zn) were studied in Moghan in soil with 3.3 mg.kg-1 available Fe and 0.61mg.kg- 1available Zn. The best statistically treatment were first level application as broadcast combined with spraying . In Khorram Abad experiment the four elements, (Cu, B, Mn, and Zn) were studied. Application of ZnO4 in soil and foliar application could increase yield significanrly. There was no significantly difference in yield between different levels of MnSO4 fertilizer, and the highest yield were obtained from 60 kg.ha-1 as broadcas application or 30 kg.ha-1 as band application of MnSO4 .The results of analysis of variance showed treatments could not changed seed yield and oil percent significantly, while soil available B was 0.34 mg.kg-1..Different rates of CuSO4 have not shown significant changes in analysis of variance for grain yield in Khorram Abad.But application method and interaction of soil application with spraying have changed significantly . The maximum seed yield were obtained from consumption 20 kg.ha-1 CuSO4 as banding and one time foliar application.