Effect of spraying with organic nutrients and adding levels of potassium fertilizer on the growth and yield of red cabbage

Abstract

The research was conducted at Research Station (A) of the College of Agricultural Engineering Sciences - University of Baghdad in the autumn season 2022-2021 to know the effect of spraying the organic fertilizer Fertiorgan and adding potassium fertilizer on the growth and yield of red cabbage. The research was done using a randomized complete block design R.C.B.D. with three replications. The first factor included spraying with the organic nutrient (Fertiorgan) with three concentrations (0, 1.5 and 3 ml. L-1 ) symbolized by F0, F1, and F2, respectively. The second factor included the addition of potassium fertilizer in the form of potassium sulfate at four levels (0, 100, 135 and 170 kg.ha-1 ) with a symbol K0, K1, K2, and K3, respectively. The results showed the superiority of the concentration (3 ml. L-1 ) of the organic nutrient in the characteristics of plant height (47.53 cm), stem length (18.83 cm), number of outer leaves (18.74 leaves. plant-1 ) and leaf area (1214.96 dm2 .plant-1 ). The dry weight of the vegetative total was (225.92 g) and the total yield (45.53 tons. ha-1 ), and the level (170 kg. ha-1 ) of potassium fertilizer showed a significant increase for the same trait above, reaching (45.80 cm) and (17.72 cm) and ( 18.18 leaves. plant-1 ), (1171.02 dm2.plant-1), (208.11 g) and (40.48 tons. ha1 ), As for the two working interactions, the interaction treatment (F2K3) was excelled in giving it the highest values for these traits, as it reached (52.62 cm), (21.39 cm), (21.55 leaves. ) and (1296.97 dm2 .plant-1 ) and (248.33 gm) and (50.00 tons.ha1 ) Keywords: organic nutrients, red cabbage, potassium fertilizer, Fertiorgan.