STUDIES ON DIFFERENTIAL RESPONSE OF SPRING CANOLA CULTIVARS TO BORON TOXICITY |
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| Authors: | Ö Öztürk S Soylu R Ada S Gezgin M Babaoglu |
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| Institution: | 1. Department of Field Crops , University of Sel?uk , Konya, Turkey;2. Department of Soil Science and Plant Nutrition , University of Sel?uk , Konya, Turkey |
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| Abstract: | Although many states recommend boron (B) fertilizer for many field crops, information about B toxicity of canola is lacking. This experiment was carried out at Central Anatolia, Turkey from 2002 to 2003, to determine genotypic range in B efficiency of eight spring canola cultivars, to identify the B-inefficient cultivars and to identify specific responses. The cultivars were grown under B moderate deficiency (extractable B 0.56 mg kg?1) and toxic B applied (15 kg B ha?1) conditions. According to the results, seed yield varied significantly among the cultivars and B application decreased the seed yield by 31% on average. Also, toxic B application reduced protein and oil contents similar to seed yield, and increased leaf B concentration in all varieties. This study has shown that leaf B concentration has increased considerably when B is applied to Pactol and Star cultivars, but seed yield of +B and ?B has not shown significantly a change. It is possible to say that Star and Pactol—which have not been affected by the toxic B application—are genotypes that are tolerant to B toxicity and may be cultivated at B toxic lands. |
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| Keywords: | boron toxicity interaction oil ratio protein ratio seed yield canola |
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