Effect of silicon, GA3 and humic acid on broad bean plants growth

Abstract

Abstract A field experiment was carried out during the winter season 2016-2017 to study the effect of silicon spraying at three levels (0, 5 and 10 ml.L-1) , two levels of GA3 (0 and 0.85 mg.L-1 ) and two levels of humic acid (0 and 5 ml.L-1) in a private field in Hilla city- Algiers district, in randomized complete blocks design (RCBD ) with three replicates. The results showed that Silicon spraying at 10 ml.L-1 caused an increase in plant height, leaf area, leaves number, branches number and chlorophyll content which were 89.16 cm, 56.41 cm2, 47.16 leaves, 7.75 and 61.25 SPAD compared to control (78.25, 51.33, 39.75 , 7.00 and 56.91).GA3 spraying caused an increase in plant height, leaf area, leaves number, branches number and chlorophyll content , which were 90.22 cm, 56.72 cm2, 46.17 leaves , 7.78 branches and 60.44 SPAD compared to control (79.33, 50.83, 40.78, 7.06 and 57.89). Humic acid spraying caused an increase in plant height , leaf area , leaves number , branches number, and chlorophyll content which were 88.28 cm, 56.39 cm2, 46.17 leaves ,7.83 branches and 60.28 SPAD compared to control (81.28, 51.17, 40.78, 7.00 and 57.89). Some interactions had a significant effect on some characteristics, and the interaction of GA3 with 10 ml.l-1 of silicon gave highest plant height and leaves number (92.33 cm and 50.17).