جستجوی مقالات مرتبط با کلیدواژه « تندش دانه گرده » در نشریات گروه « باغبانی »

In this research, bearing status and fruit quantity and quality traits in some apricot cultivars in Karaj condition were studied. Flowering time range was one week. The percentage of pollen germination (50.4-80.8 %), pistil length (5.24-9.13 mm), ovary diameter (0.96-1.83% mm) and double pistils (0-31 %), Initial fruit set (0.3-38.8 %) and finally fruit set (0.1-30.5%) were obtained. Also, ripening time range was 35 days and fruit development (86-118 days) and yield of cultivars (3-38.3 Kg tree-1) were attained. The studied cultivars were round in shape and their fruits weight range was 24.5-51.8 g. The stone weight included a lower percentage of fruit weight (3.3%) in the ʻAmeneh Dizbadʼ. The skin hue angle was obtained as 85.1-99.5 degrees. The highest TSS (19.47˚ Brix) was observed in the ʻShahroodiʼ. All cultivars had a low TA (<0.7%). The pH juice range was 4.6-5.9. Antioxidant capacity (22.53-28.53 %), vitamin C (6.37-20.53 mg 100ml-1 Juice), and total phenol (176.62-330.31 mg GAE 100g-1 FW and flavonoid contents (3.21-5.57 mg Q 100g-1 FW) were obtained. Fruits of ʻAmeneh Dizbadʼ, ʻShahroodiʼ, and ʻRajabaliʼ were among superior cultivars that seems to be good for fruit production in Karaj conditions.

Boron deficiency can be a limiting factor for flowers and fruits formation in some olive orchards. The appropriate time of boron foliar application in different areas and cultivars needs more investigations. This study was conducted to investigate the effects of spraying with an optimum concentration of boron (350 mg/l) at different phenological stages: after fruit harvest in autumn (first stage), the onset of flower bud formation in winter (second stage), during anthesis in spring (third stage), alone or in combination, on flowering  and fruit formation in three olive cultivars (Bella di, Mission and Koroneiki). The characteristics such as inflorescences number, total flowers number, complete and incomplete flowers percent, final fruit-set, percentage of pollen germination, and leaf and inflorescence boron content were evaluated. Boron spraying increased the percentage of pollen germination in all three cultivars compared to control. Spraying  in first stage and in combination of the first and the second stages increased the total number of flowers and inflorescences in Koroneiki and in combination of all three stages increased these characteristics in Mission. Bella di with spraying in second stage and in combination of second and third stages, and Koroneiki in third stage had the highest percent of complete flowers. The highest percent of fruit-set was observed in combination of the first and the third stages, and in combination of the second and the third stages in Koroneiki and then in combination of all three stages in Mission. Spraying in combination of the second and the third stages increased leaf and inflorescence boron contend in all three cultivars.