ISHS Acta Horticulturae 726: IV International Symposium on Pistachios and Almonds
EFFECTS OF DIFFERENT AMOUNTS AND APPLICATION TIMES OF SOYBEAN OIL SPRAY ON DELAYING TIME BLOOMING OF ALMOND |
| Authors: | R.B. Samani, M. Mostafavi, A. Khalighi, A. Mousavi |
| Keywords: | almond, Prunus dulcis, soybean oil, delay, time blooming |
| Abstract:
Almond (Prunus dulcis) is one of the most important fruit trees in Chaharmahal va Bakhtiari province. Almond trees require lower chilling units for flowering in comparison with other temperate fruit trees. Thus, spring freeze injury is one of the most important limiting factors almond productivity. In order to study the effects of different amounts and application times of soybean oil on delaying blooming time of almond cv. “Sefid”, an experiment was conducted in factorial base on a complete randomized block design (CRBD) with three replications in 2002-2003. Almond trees were selected and sprayed with concentrations of 0% (control), 5%, 10%, and 15% v/v soybean oil in three different times included: 1) before swelling bud stage 2) swelling bud stage 3) green tip bud stage. The parameters such as phenological development of flower bud and content of frost injury, fruit set and fruit drop were measured. The results indicated that the treated trees with concentration 15% v/v soybean oil before the swelling bud stage delayed the blooming time two days in comparison with control trees. Application of soybean oil in this stage significantly increased fruit set and decreased frost injury in almond cv. “Sefid” but had no significant effect on fruit drop. | |
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