Vegetos
(An International Journal of Plant Research & Biotechnology)
Mitigating the negative impact of irrigation water deficit in oat (Avena sativa L.) with glutamic acid foliar application
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Tawfik M. M., Amin Gehan A., Sadak Mervat S., Bakhoum Gehan Sh.
Research Articles | Published: 25 February, 2026
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Keywords: Oat, Forage crops, Chemical analysis, Nutritive values
Abstract
The purpose of this study was to assess glutamic acid’s potential effectiveness in compensating for irrigation water deficiency. To achieve the target above, two field experiments were conducted under sandy soil conditions during two winter seasons of 2019/2020 and 2020/2021 to investigate the role of glutamic acid with three concentrations (0, 5 and 10 mg/l) on growth, yield, chemical composition and nutritional value of oat plants grown under three levels of irrigation water (100%, 75% and 50%). The findings clearly demonstrated how glutamic acid improved the quality and production of oat plants. Foliar application of oat fodder by glutamic acid with different concentrations (G5 mg/l and G10 mg/l) significantly increased their yield and yield attributes with superiority to 10 mg/l treatment compared to control plants. In addition, foliar application of oat fodder with glutamic acid significantly improved the contents of DM %, CP %, CF %, EE %, NFE %, GE, (DE), ME. Nutritive values of oat plants were also improved. Also, DCP and TND improved. Cell wall composition was also improved. Moreover, glutamic acid treatments enhanced levels of photosynthetic pigments, carbohydrate constituents, IAA, and phenolic contents. On the other hand, decreasing irrigation water to 75 and 50% significantly decreased the previous characteristics. However, significant results were obtained for the interaction effect of glutamic acid and water deficit. From the obtained data it could be concluded that glutamic acid at G5 mg/l or G10 mg/l indicates satisfactory yield, quality plant productivity and good nutrition value under moderately limited irrigation water (75% water irrigation). Verifying these results will require additional research, investigating diverse application methods and concentrations.
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Author Information
Field Crops Research Department, Agricultural and Biological Institute, National Research Centre, Giza, Egypt