วันศุกร์ที่ 1 กุมภาพันธ์ พ.ศ. 2556

Phoenix dactylifera palm


Phoenix dactylifera (date palm) is a palm in the genus Phoenix, cultivated for its edible sweet fruit. Although its place of origin is unknown because of long cultivation, it probably originated from lands around Iraq. It grows 70–75 feet in height growing singly or forming a clump with several stems from a single root system. The leaves are 4–6 m long, with spines on the petiole, and pinnate, with about 150 leaflets; the leaflets are 30 cm long and 2 cm wide. The full span of the crown ranges from 6 to 10 m. Dates contain 20–70 calories each, depending on size and species.
Date palms can take 4 to 8 years after planting before they will bear fruit, and produce viable yields for commercial harvest between 7 to 10 years. Mature date palms can produce 80–120 kilograms of dates per harvest season, although they do not all ripen at the same time so several harvests are required. In order to get fruit of marketable quality, the bunches of dates must be thinned and bagged or covered before ripening so that the remaining fruits grow larger and are protected from weather and pests such as birds.

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