Effect of NPK chemical and nano fertilizer on growth and yield of three potato cultivars Solanum tuberosum L.

الملخص EN

The experiment was conducted in the vegetable field of the Department of Horticulture and Landscaping / College of Agriculture and Forestry / University of Mosul in the spring season 2021.

To study the effect of three potato cultivars(Arizona, Montreal, Florice) and five levels of the fertilizer combination (NPK 15-15-15, 75% chemical + 25% nano, 50% chemical + 50% nano, 25% chemical + 75% nano, Chemical Zero + 100% Nano.The experiment was designed in the split-plot system using The Randomized Complete Block Design (RCBD) and with three replicates, where the cultivars were placed in the main plots and the fertilizer combination treatments in the split plots.The results can be summarized as follows: Arizona cultivar gave the highest significant values in plant height 60.36 cm, number of aerial stems per plant 5.62 stem.plant -1, number of tubers per plant, plant yield, total yield of tubers and marketing yield of tubers reached 13.82 tubers.plant-1, 874.26 g and 46.627 tons ha-1 and 41,791 tons ha-1, respectively .The Montreal cultivar gave the highest significant value in the average tuber weight of 70.80 g.

For the fertilizer mixture, 50% chemical + 50% nano treatment gave the highest significant values in plant height, number of aerial stems per plant, leaf area of plant, content of chlorophyll a and chlorophyll b in leaves and number of tubers.

The average tuber weight, plant yield, total yield of tubers, marketing yield of tubers 62.40 cm, 6.00 stems.

plant -1, 6887 cm2 plant-1, 1.84 g.g-1 fresh weight, 1.57 g.g-1 fresh weight, 13.01 tubers.plant-1, 72.66 g and 939.61 g and 50,112 ton.ha-1 and 45.210 ton.ha-1, respectively.The interaction of Florice cultivar with the fertilizer combination 50% chemical + 50% nano gave the highest significant values in plant height.

The treatment of Arizona cultivar with the fertilizer combination 50% chemical + 50% nano, gave the highest significant values in the number of aerial stems of the plant, the number of tubers per plant and the yield of the plant.The Montreal cultivar with the fertilizer combination 50% chemical + 50% nano gave the highest significant value in the leaf area of the plant, the content of chlorophyll a and b in the leaves, the total yield of the tubers and the marketing yield of the tubers.