Effect of foliar fertilization on the growth of some potato varieties

A factorial experiment was carried out according to randomized complete block design withthree replications in Babylon governorate in two sites (Al-Basira and Al-Nakhaila) during theautumn season 2017 to study the response of three potato varieties (Rivera, Arizonaand Burren) to 4treatments of foliar fertilization. The foliar treatments were control, 10 ml.l-1of high potash (NPK, 0-5-30), 10 ml.l-1of nutrient solution (nitrogen 7%, phosphorus 5%, potassium 7%, magnesium 0.5%,potassium-humate 0.5% and micro elements) and half the quantity of both fertilizers. The sprayingwas twice at 45 days of planting (when tubers were formed) and 14 days after the 1st spraying (whentubers were enlarged). The results were summarized as follows: Burren cultivar gave the highestplant height (63.99) cm, leaf number (55.7), leaf area (4955) cm2, chlorophyll (55.7) SPAD and leafpotassium percentage 2.01%. Spraying of high potash fertilizer was superior in plant length (61.85)cm, number of leaves (57.2), leaf area (5011) cm2, chlorophyll (57.2) SPAD and leaf potassiumpercentage (2.07%). Al-Basira local was superior in plant leaf number (52.3), leaf area (5052 cm2)and chlorophyll (52.3SPAD). The interaction between the varieties and the fertilization wassignificant in the percentage of plant dry matter