Phoenix dactylifera L.) LEAVES, THEIR SUGAR  AND NITROGEN CONTAINT

Hussain, F.A.; Jarah, A.T.; Mohamad, L.I.

	Phoenix dactylifera L.) LEAVES, THEIR SUGAR AND NITROGEN CONTAINT
IRAQ JOURNAL OF AGRICULTURE
Article 1, Volume 14, Issue 6, 2009, Pages 0-0
Authors
F.A. Hussain; A.T. Jarah; L.I. Mohamad
Abstract
This Study was carriedd on date palm trees grown at Alazyzea Date Palm Station which belongs to the General Board of Date Palm, on 2006. Three uniform date palm trees were selected, Pollination was done manually. Leave samples were collected from three parts on leaf (base, middle and the end of leaf) at three periods, March, June and September, to study the physical properties, water content, total carbohydrate and nitrogen content, as well as the yield quantitatively and qualitatively. The result showed significant differences in leaf length and weight for the three periods in study. The leaf weights were 3.07, 2.94 and 2.95 Kg on March, June and September, Respectively. Significant differences were obtained on moisture, total carbohydrate and Nitrogen percentage in relation with the age of the leaves. Carbohydrate content was increased at March and gradually decreased during growth season due to pulling carbohydrates from leaves to fruits. Nitrogen percentage in leaflets was 1.45, 1.05 and 1.00 for March, June and September respectively while the percentages tend to fluctuate in the midrib. As for leaf age significant differences were obtained in midrib but not the leaflets. The Nitrogen content was decreed according to the soil depth and decreased gradually during March, June and September it was 24.5 and 22.7 and 21.6mg N kg soil respectively

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