نفذ البحث في مركز البحوث العلمية الزراعية في السويداء لدراسة تأثير الري الناقص في نمو
غراس أربعة طرز من أصول التفاح البذرية لاختبار قدرتها على تحمل ظروف الجفاف، و لا سيما في ظل
نقص مصادر المياه و انحباس الأمطار. استخدم مستويان من الري: %100 من الاحتياج المائي (شاهد)
و %75 من الاحتياج المائي (معاملة ثانية)، و درس طول الطرود، و عدد الأوراق، و طول و عرض الورقة،
و توزع المجموعة الجذرية في التربة، و حسب الاحتياج الكلي من مياه الري و الاستهلاك المائي عند كل
مستوى ري. دلت النتائج على تأثير الري عند مستوى %75 من السعة الحقلية على قصر طول الطرود
و انخفاض عدد الأوراق و مساحتها في جميع الطرز المدروسة، و ازداد تعمق الجذور بالمقارنة مع مستوى
الري %100 من السعة الحقلية استجابة لظروف نقص ماء الري، و اختلفت الطرز المدروسة فيما بينها
من حيث قوة النمو، إذ تفوق الطرازان C و S2 على الطرازين A و B.
The present investigation was carried out at the Agricultural Scientific
Research Center in Swieda to study the effect of deficit irrigation on the growth
of four apple seedlings rootstocks genotypes and to estimate their ability to
drought tolerance particularly in light of the lack of water sources and no rain.
Two irrigation levels: 100% (control) and 75% of water requirements were
applied. The shoot length, leaves number, leaves area, the distribution of the
roots in soil, the depth of irrigation water in the soil and the consumption of
water in each level were measured. Results showed that irrigation with 75% of
field capacity on studied genotypes caused reduction of shoots length, decline of
leaves number and area and the depth of root comparing with the control.
There were significant differences between studied genotypes in terms of vigor
where the genotypes C and S2 were superior than A and B.
References used
Atkinson, D. 1983. The growth, activity and distribution of the fruit tree root system, Plant and Soil Journal. 71: 23-35
Atkinson, C. J., M. Policarpo, A. D. Webster and A. M. Kuden. 1999. Drought Tolerance of Apple Rootstocks: Production and Partitioning of Dry Matter, Plant and Soil Journal. 206( 2):223-235
Connell, O. and M. G. Goodwin. 2007. Responses of 'Pink Lady' apple to deficit irrigation and partial rootzone drying: physiology, growth, yield, and fruit quality, Australian Journal of Agricultural Research. 58:1068-1076
Predicting crop yield response to irrigation level is increasingly important to
optimize irrigation under limited available water and for enhancing
sustainability and profitable production. This study was carried out to evaluate
the performance of
This study was carried out on a 17 years Vineyard (Helwani,
Betamooni. Cvs) when the study started. Two deficit irrigation
treatments were studied (%88, 60%), in addition to the control (full irrigation), and each treatment included three replicati
This study was carried out to compare the performance of the FAO
AquaCrop and CropWat models in simulating the effects of deficit irrigation on
cotton crop. The models were calibrated using data from the 2007 growing
season of a field study conduc
A field experiment was carried out in Hout research station- Agriculture research center in
Swaida – General Commission For Scientific Research Agricultural during the growing
season of 2015-2016 to study the effect of different levels of deficit i
The study was performed in Barshin Research Station- General
Commission for Scientific Agriculture Research on the trees age of
13 in grafted with Golden Delicious Cultivar on three rootstocks
(seedless rootstock Malus domestica, vegetative strong