Effect of organic, mineral and bio-fertilizer and their interaction on growth, and some quality characters of potato Solanum tuberosum L. cv. (Burren)

Abstract

The experiment was conducted in the greenhouse of the Department of Horticulture and Garden Engineering - College of Agricultural Engineering Sciences - University of Baghdad in the spring season 2020-2021 within randomized complete block (RCBD) to study the effect of the foliar application with (Humic), biofertilizer (Biohealth) and balanced mineral fertilizer (NPK) 20:20:20 and the interaction among them on growth and yield of potatoes (Burren) cultivar, After completing the laboratory and field study indicators, the averages were compared to calculate the least significant difference (L.S.D) at 5% significance level. The results were as follows: The interaction between humistar and NPK was significantly superior in leaf chlorophyll content (0.916 mg.gm-1), while the number of stems per plant was not significantly different between NPK treatment and biofertilizer and triple interaction (3.33 stem. plant-1), While there were significant differences among the rest of the experimental treatments, while the treatment of biofertilizers was significantly superior in the stem diameter which gave (0.833 mm). The root length characters was superior in treatment of interaction between the biofertilizer and the NPK with significant difference compared to other treatments (37.00 cm), while the biofertilizer treatment significantly increased the weight of the roots by giving (91.00 gm). The percentage of soluble solids in tubers was highest in the treatment of triple interaction (organic, mineral and biological) with significant difference compared to the rest of the treatments (17.10%). The treatment of NPK and the interaction with the organic acid were significantly superior in leaf nitrogen and nitrate content by giving (1.85% and 125.67 ppm), whereas The leaf content of potassium showed that the interaction between organic acid and NPK and the triple interaction treatment significant differences compared to the rest of the experimental treatments which gave (1.78%).