The Effect Of Potassium Fertilization And The Addition Of Humic Acid On The Growth And Yield Of Wheat Crop Under Different Levels Of Salinity Of Irrigation Water

Abstract

The experiment was carried out in the autumn season (2020-2021) in the fields of the College of Agriculture - Wasit University in order to know the overlapping effect of salinity stress, humic acid and potassium on the wheat crop, Buhuth class 22. A factorial experiment was implemented using a completely randomized design (CRD) with four repetitions for each treatment in which three levels of salinity of irrigation water were used and symbolized (1.2 S1 = 3, S2 =, 6 S3 = decimens) on the sequence and two levels of potassium fertilizer (150 K1 = and 250 K2). = kg K H -1 Humic acid was added (0.02%) by different methods of addition, namely: ground addition HT, foliar application HF and combined addition HFT and the total amount was divided into three stages of growth (branching, elongation, flowering).The results showed the superiority of S1 treatment. (1.2 decims) significantly in plant height (52.56 cm), weight of 1000 grains (47.21 g), number of spikes in the pot (20.92 spike spikes-1) and weight of grains in pot, while the treatment of saline water S3 recorded the least significant difference for all of the above traits. For the second level of potassium K2 in plant height (63.58 cm) and weight of 1000 grains (43.97 g), the number of spikes in the pot (18.78 pot spikes-1) and the weight of grains (55.61 kg pot-1), while the first treatment of potassium K1 showed the least significant difference for all of the above traits. The results showed a significant superiority of the HFT co-additive in ART the plant high (67.00 cm) and the weight of 1000 grains (49.06 g), which does not differ significantly from the ground addition HT, while the comparison treatment H0 showed the least significant difference for all the above traits. The ground addition of humic also achieved a significant superiority in the number of spikes in the pot (19.83 gm pot-1) and weight. Cereals (6.35 tons H-1) and grain weight (56.89 gm pot-1)