تأثير التقليم الشتوي و انفاتون في الحاصل و نمو أفرع المشمش و محتواها من الكاربوهيدرات

Abstract EN

This experiment was conducted at apricot orchard, Dep.

of Horticulture, College of Agriculture, University of Baghdad, Abu Ghraib during the growing seasons of 2009 and 2010.

Apricot trees Prunus armeniaca L.

cv.

Zaini five year old were used.

This study included two factors ; growth regulator(e) and winter pruning (t) wich done in the beginning of february.

The first factor four levels were used, 0,0 (e1), 600 (e2), 900 (e3) and 1200 (e4) mg / l and four levels of pruning, 0,0 (t1), 10 (t2), 20 (t3) and 30 (t4) % of the branches.

Each treatment replicated three times with a factorial experiment using RCBD.

The number of trees used were 48 trees.

The experimental results showed that growth regulator (Enfaton) 600 mg / l and thinning 30% of branches (e2t4) significantly gave the highest leaf area of 24.06 and 24.61 cm2 and the highest average yearly growth of 31.51 and 35.63 cm and the highest chlorophyll index of 30.68 and 31.94 SPAD unit and the highest average fruit weight of 12.93 and 13.18 gm and yield per tree of 11.52 and 13.26 kg for both seasons, respectively.

The lowest value of these parameters were found in the control (e1t1) treatment, it was highest in branches content of carbohydrates of 10.65% and 9.52% in both seasons, respectively.

The experimental results showed that the highest in branches content of carbohydrates was in January of 14.71 and12.79% and the lowest of these average was in June of 5.16 and4.95 % in both seasons, respectively.

It could be concluded from this experiment that the growth regulator at level e2 and winter pruning treatments at the level t4 improved vegetative and fruits characteristics in apricot trees cv.

Zaini and we recommended conducting these treatments annually and study the effect of growth regulator and winter pruning in the other dates on the apricot cvs.