The Effects of Micronutrient Fertilizers on Quality and Quantity of Sugarbeet
2003
Niromandi Jahromi,Mahmoud | Khogar,Zahra | Jookar, Ladan | Kamran, Reza | Khaje, askar | Zare, Nader
In order to investigate the effects of foliar application of micronutrient fertilizer (sulfates of Fe, Mn, Zn and Cu) on the quantity and quality of sugar beet, 6 independent experiments were conducted in Marvedasht and Fasa area during the years 1999-2000. The number of selected sugarbeet farms for foliar application of Fe, Mn, Zn and Cu sulfates were 4,4,4 and 2 respectively. The amount of each element in the soils of each farm was determined beforehand. The soil samples were taken from 30cm depth of surface soil, using DTPA as an extractant, the amounts of these elements were measured in soil extracts by Atomic Absorption instrument, as fllows: Fe: 3.04, 4.48, 3.12 and 3.40 mg.kg-1 soil Mn: 5.06, 4.70, 4.60 and 5.14 andldquoandldquoZn : 0.64, 0.44, 0.62 and 0.68 andldquoandldquoCu: 0.46 and 0.62 mg.kg-1 soil The treatments consisted of 5 different levels of micronutrient fertilizers, which were replicated in 4 times and conducted in each farm as a Randomized Completely Blocks Design. The levels of micronutrient fertilizers applied as foliar were as follows: FeSO4 and Mn SO4 at concentration of 0,2,4,6 and 8 kg.M-3 of water. ZnSO4 and CuSO4 at concentration of 0,1,2,3 and 4 kg.M-3 of water. After crop thinning foliar application have been done. The data of the experiments were analyzed by using the SAS and SPSS softwares, and presented as tables and graphs. The results showed that foliar application of Fe and Mn sulfates in soils having 3.04 and 4.70 mg.kg-1 Fe and Mn respectively, had a significant effect on root yield. But the effects of zinc sulfate in the same farms were not significant. The sugar content was not influenced by the application of Fe, Mn and Zn- sulfates, although there was an increase in some cases. The concentrations of Fe, Mn, Zn and Cu in sugar beet leaves, measured by Atomic Absorption on dry matter basis in 14 independent experiments were in the ranges of: Fe (48 to 958), Mn (42-547), Zn (19-66) and Cu (2.08 to 22) and#1635and#1632ppm. The concentrations of these elements in control plot were even higher than the critical levels reported in other research works.
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