تأثير الأصل في قدرة صنف التفاح ستارك ريمسون على امتصاص العناصر الغذائية NPK في ظروف الزراعة المطرية في محافظة السويداء

الملخص EN

The research was conducted at the Pome and grapevine Division and agricultural scientific research center fields and laboratories in Sweida- GCSAR during 2011-2012 to study the influence of apple rootstocks (Malus domestica and MM106) on N, P and K minerals uptake in Stark Rimson cultivar under rainfed conditions.

The results showed that thehighest significant accumulation of Nitrogen, Phosphorous and Potassium in shoots were in May for the two studied rootstocks in the comparison with other growth months, which were 2, 0.22, and 0.78% respectively in MM106 rootstock, while they were 1.6.

0.22, and 0.79% respectively in Malus domestica rootstock.

In leaves, the significant accumulation of N was at the end of June for the two rootstocks in comparison with the other growth months, and MM106 significantly revealed higher accumulation of Nitrogen than Malus domestica (2.9% and 2.7%, respectively),while forP and K elements, the highest accumulation was in may in trees which grafted on MM106 rootstock which were 0.26 and 1.35, respectively, and the trees that grafted on Malus domestica rootstock significantly revealed the highest accumulation in August (1.57%).

In fruits, the highest concentration of N, P, and Kwere in June for the two rootstocks which were in significant with the other growth months, Whereas, P revealed second peak in August which was the highest in trees grafted on the two rootstocks (0.19% and 0.14% in MM106 and Malus domestica, respectively) with significant variance between the two rootstocks and with the other growth months.

Consequently, this investigation showed the ability of fertilization management of apple farming through controlling the amounts and time of ground and foliar fertilization depending on the accumulation of mineral elements during growth season.