59-9 Impacts of Silicate Application on Growth and Yield of Wheat (Triticum aestivum L.) Under Salt Stress Conditions.

See more from this Division: SSSA Division: Soil Fertility & Plant Nutrition
See more from this Session: Soil Fertility & Plant Nutrition: I

Monday, November 16, 2015: 11:50 AM
Minneapolis Convention Center, L100 C

Mostafa A. Ibrahim1, Abdelrahman M Merwad2, Elsayed A Elnaka3 and C. Lee Burras1, (1)Agronomy, Iowa State University, Ames, IA
(2)Soil and Water Science, Zagazig University, Zagazig, Egypt
(3)Soil and Water Science Department, Zagazig University, Zagazig, EGYPT
Abstract:
Farming under saline conditions and water shortage in Egypt is inevitable where approximately one third of the irrigated soils in Egypt has been classified as salt-affected soils. The aim of this work was to investigate the effect of silicon application on the growth characters and yield of wheat (Triticum aestivum L.) (CV. Sakha-93) grown in pots under salt stress conditions under local weather conditions. The treatments included 5 levels of soil salinity (2.74, 5.96, 8.85, 10.74, and 13.38 dSm-1) and 5 levels of SiO2 (0, 300, 600, 900, and 1200 mg L-1). Silicate was applied to wheat plants as a foliar spray after 30, 45, and 60 days from planting date. Soil moisture condition was approximately adjusted by weight to 70% of water holding capacity. Results indicated that grain and biomass yield decreased under each silicate level with increasing salinity concentration. All of the silicate levels showed higher grain yield under all salt levels compared with the control (0.0 mg SiO2 L-1). Under each salinity level, the highest grain and biomass yield was observed under 900 mg L-1 SiO2, and the lowest was observed under 0.0 mg L-1 SiO2.  Generally, increasing salinity concentration and silicate levels resulted in increasing proline concentration in the wheat leaves. Under each salinity level, the highest proline concentration was observed under 900 mg L-1 SiO2, and the lowest was observed under the control (0.0 mg L-1 SiO2). By comparing all of the treatments, the combination between 900 mg L-1 SiO2 and salt level 2.74 dSm-1 showed the highest plant height of 108.2 cm, straw yield of 1.6 g/plant, grain yield of 1.4 g/plant, and biomass yield of 3.1 g/plant. However, the lowest results of the aforementioned properties were observed under the combination of 0.0 mg L-1 SiO2 and salt level of 13.38 dSm-1.

See more from this Division: SSSA Division: Soil Fertility & Plant Nutrition
See more from this Session: Soil Fertility & Plant Nutrition: I