Effect of Spraying Concentration of Silicon on some Physiological Characteristics of varieties of Maize by the effect of Water Stress

Abstract

   A field experiment was carried out in the Musayyib Technical College field for the autumn season 2021 to demonstrate the effect of silicon on some physiological characteristics of maize under the influence of water stress.. the split-split plot experiment was designed with (R.C.B.D)design with three Replication, including three water stress Treatments called it (I3, I2, I1) placed in the main plot, while the secondary panels They were include to the concentrations silicon (potassium silicate) (K2SiO3) called it (C1,C2,C3)(0,1,1.5m.L) respectively, As for the varieties(Tarkeby 5018, Sumer ,Baghdad 3)  (V1, V2, V3), respectively, they were placed in the sub- sub secondary panels. The results show that there are significant differences for the leaf content of chlorophyll and the amino acid proline when depleting 50% of the available water (I1) and its interactions with the concentrations of silicon (C) and varieties (V), as the combination (V2*V3*I1) achieved The highest average of the traits was 46.327 mg.g-1wet.w. While the treatment (I3,V3,C1) was superior in giving the highest average of the proline content in the leaves reached 4.7367 Micromole. gm-1. The lowest average chlorophyll content was recorded with the treatment When the depletion treatment was 90% available water (I3) and its interactions, (v1*c1*I3) achieved the 22.583. mg.g-1wet.w, and the lowest average proline content was recorded with the treatment When the depletion treatment was 50% available water (I1) and its interactions, where the combination(v2*c3*I1) achieved the 3.6367 Micromole. gm-1 ,the highest rate of chlorophyll content and the lowest rate of proline content were recorded with the depletion treatments (I1) 50% achieved 39.746 mg.g-1wet.,3.8570 Micromole.gm-1respectively. The binary interaction between the water treatment and silicon concentrations (I*C) is significantly superior to the interaction (I1*C3) (50%, 1.5 ml/L-1 silicon) achieved 43.854 mg.g-1wet.w for the chlorophyll content. the lowest average chlorophyll content was recorded with the treatment (I3,C1) achieved 23.622 mg.g-1wet.w,and the lowest average proline content was recorded with the treatment (I1,C3) 3.6967 Micromole. gm-1 .all the binary interactions were significant between the depletion coefficients and varieties on the one hand, and the concentrations and varieties from the other side