Response of potato plants to potassium and micronutrient fertilization [electronic resource]

Includes references.

Two field experiments were conducted on sandy soil at EI-Sharawy Village in EL -Bostan area, Noubaria region, Elbeheira Governorate (Latitude 30̊ 43' 22. 01" N, Longitude 30̊ 16' 44.50" E), Egypt, during two successive winter seasons of 201312014 and 201412015 to study the effect of K₂O levels i.e.(50, 75 and 100 % of the recommended rate 96 kg K₂O1fed) along with foliar spraying with 1% K20(2% K-sulphate) and/or mixture of Fe(150ppm), Zn(75ppm) and Mn(75ppm) on the growth, productivity, yield characters and quality of potato plants cv. Spunta. The results showed that plant height, foliage fresh and dry weight/plant, total yield, tuber number and yield per plant were affected by K supply. Raising K level up to 96kg K20/fed significantly increased the above mentioned vegetative growth parameters and total yield. Tuber yield and quality of potato plants were significantly higher when soil and foliar application of 1% K20 and lor micronutrients were combined. The best results were achieved with foliar application of 1% K20 and micronutrients together with a basal fertilization of 96 kg K20/fed. Similarly, macronutrients (N, P and K) and micronutrient (Fe, Zn and Mn) content in tubers recorded the highest values when soil and foliar application were combined. The interaction between foliar application of 1% K₂O and micronutrients combined with 72 or 96 kg K₂O soil application produced significantly high vegetative growth characteristics, tuber yields and quality of potato plants with no significant difference between the two rates 72 and 96 kg

Summary in Arabic.

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