Effect of addition of humic acid and water stress in some growth traits of wheat plant Triticum aestivium L.

الملخص EN

A field experiment was conducted for the cultivation of wheat crop Triticum aestivum L.

in one of the fields belonging to the extension farm experiments in Al-Mahnawiya belonging to the Extension Center in Babylon province during the winter season (2017-2018) to study the effect of adding humic acid in wheat bearing to water stress during branching stage and grains filling stage, In the experiment, three levels of humic acid were used (0: The control treatment, 20 kg.ha-1: Added to soil, 10 ml.L-1: Sprayed on the plant) which are symbolized by (H0, H1, H2), respectively.

Three water stresses were also used: S0 is the control treatment, (S1) stopping irrigation in the branching stage, (S2) stopping irrigation in the grain filling stage.

The experiment was applied within the classification of the Randomized Complete Blocks Design (R.C.B.D), in the order of split plots, with three replicates.

Wheat seeds (Aba 99 cultivar) were cultivated which obtained from Agricultural Research Station in Babylon.

Concentrations of nutrient elements have estimated of nitrogen, phosphorus and potassium in post-harvest soil.

Plant height, number of branches, weight of 1000 grains, Biologic yield, grain yield and harvest index, concentrations of nutrient elements (N, P, K) in grain, Protein and Leaves content of K were also estimated.

The depth of irrigation water and its date were determined depending on the moisture of the soil and according to the depth of the plant root system and the results were as follows: