Maryam Tatari; Asghar Mousavi; Parisa Mashayekhi
Abstract
For vegetative propagation of Nemaguard, St Julien A, Tetra and GF677 rootstocks via cutting, two separate experiments were carried out in a factorial based on completely randomized design. Semi hardwood cuttings were taken in late August and then treated with concentrations of zero, 1500, 2000, 2500 ...
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For vegetative propagation of Nemaguard, St Julien A, Tetra and GF677 rootstocks via cutting, two separate experiments were carried out in a factorial based on completely randomized design. Semi hardwood cuttings were taken in late August and then treated with concentrations of zero, 1500, 2000, 2500 and 3000 mg/l IBA. Cuttings were cultured in perlite medium and in a greenhouse with mist system. In December, hardwood cuttings were taken and treated with concentrations of zero, 2500, 3000, 3500 and 4000 mg/l IBA. Cuttings were cultured in greenhouse that equipped with bottom heat. After two months, the percentage of rooting, root number and root length were recorded. The results showed that semi hardwood cuttings of GF677 and then Nemaguard and Tetra had the highest root number and the most rooting percentage. Root length of these three rootstocks was not significantly different from each other. St Julien A showed the lowest rooting. Most appropriate concentrations for semi hard wood cutting was 2000, 2500 and 3000 mg/l IBA. Hardwood cuttings of GF677 in 4000 mg/l IBA treatments produced the most number of roots and the highest rooting percentage. Hardwood cuttings of Tetra did not produce any roots. Rooting percentage of semi-hardwood cuttings was higher than hardwood cuttings. In general, application of semi-hard wood cutting of these rootstocks and treatment of those with concentrations of 2000 and 2500 mg/l IBA is advisable.