تأثير إضافة السماد المركب NPK و زراعة النباتات البقولية في بعض الصفات الكيميائية للثمار و تركيز عناصر النتروجين و الفسفور و البوتاسيوم في أوراق نخيل التمر (Phoenixdactylifera L.)‎ صنف الساير

Abstract EN

A study was conducted at date palm station that belong to Horticulture office of ministry of agriculture in Basra located in Hartha north of Basra during 2013 -2014 season to study the effect of the addition of the chemical fertilizer NPK+TE (20-20-20) and culture of legumes (alfalfa and broad been) around date palm trees cv.

Sayer on chemical and physical characteristics during rutab stage.

Fertilizers were added around tree trunk at depth of 25 cm and half diameter of one meter.

Fertilizer were added at (0, 250, 500, 750, 1000, 1250 and 1500) gm / tree at two different time, the first one on 15/10/2013 and second addition on 1/3/2014.

Alfalfa and broad bean were cultured around trees on 1/10/2013.

Results showed the significant effect of the treatments of fertilizer for the most studied characteristics which include, total soluble solids, total titrable acidity, total sugar,reducing sugar, sucrose and total protein in fruits, also nitrogen, phosphorus and potassium in leaves, there of the 1500 gm /tree treatment was superior in those characteristics which were (65.17, 0.54, 61.61, 52.52, 8.64,3, 1.88, 0.45 , 0.92)% respectively compaired to control treatment wheras ,it was not significantly different from alfalfa treatment in total titrable acidity which was 0.55% and alfalfa and broad bean treatment and fertilizer at 1250 gm / tree in total and reducing sugar and different from alfalfa and broad bean treatment in nitrogen Percent and alfalfa treatment in phosphorus parcent.