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Influence of nitrogen application rates on the water regime of triticale cultivars grown under Samarkand conditions

Maftuna RaimkulovaDepartment of Plant Physiology and Microbiology, Institute of Biochemistry, Samarkand State University named after Sharof Rashidov, University Boulevard 15, Samarkand 140 104, UzbekistanAkmal SANAKULOVDepartment of Plant Physiology and Microbiology, Institute of Biochemistry, Samarkand State University named after Sharof Rashidov, University Boulevard 15, Samarkand 140 104, UzbekistanU SirojiddinDepartment of Plant Physiology and Microbiology, Institute of Biochemistry, Samarkand State University named after Sharof Rashidov, University Boulevard 15, Samarkand 140 104, UzbekistanShohira AtaevaDepartment of Plant Physiology and Microbiology, Institute of Biochemistry, Samarkand State University named after Sharof Rashidov, University Boulevard 15, Samarkand 140 104, UzbekistanS J NoilaDepartment of Plant Physiology and Microbiology, Institute of Biochemistry, Samarkand State University named after Sharof Rashidov, University Boulevard 15, Samarkand 140 104, UzbekistanIxtiyor AkramovDepartment of Plant Physiology and Microbiology, Institute of Biochemistry, Samarkand State University named after Sharof Rashidov, University Boulevard 15, Samarkand 140 104, UzbekistanMakhliyo UsmanovaDepartment of Biology, Uzbek Finnish Pedagogical Institute, Street Spitamen 16, Samarkand 140 100, Uzbekistan

2026

Ochiq kirishOlmos

Litsenziya: cc-by

ABI

Annotatsiya

Currently, climate change and the dwindling availability of water resources necessitate sustainable water management strategies in arid and semi-arid agriculture. In this study, under the environmental conditions of the Samarkand region, field experiments were conducted to investigate the total water content (TWC), free and bound water dynamics, water retention capacity and water deficit characteristics in two triticale (× Triticosecale) cultivars, namely Odissey and Sardor, under varying nitrogen fertilisation rates (N0, N60, N120 and N150 kg/ha). The results obtained demonstrate that the application of optimised Nitrogen (N) fertilisation rates significantly regulate the plant water regime. As levels N increased, the TWC rose consistently, exhibiting statistically significant differences across the experimental treatments. Furthermore, a progressive increase in TWC was observed as the plant growth and development stages advanced. At the heading stage, the TWC in the unfertilised control (N0) treatment reached 80.3 % in the Odissey cultivar, whereas it slightly decreased to 78.4 % in the Sardor cultivar. Conversely, a sharp decline in TWC was recorded during the grain ripening stage, with a definitive difference of 1.9 % observed between the two cultivars. Additionally, the drought tolerance capacity of the Odissey and Sardor cultivars was evaluated in relation to varying N application rates. Under the intensive fertilisation rate of N300 P210 K150, the water deficit was recorded at 11.4 % for the Odissey cultivar and 12.8 % for the Sardor cultivar. In conclusion, to enhance the water-use efficiency of triticale cultivars grown under the semi-arid conditions of the Samarkand region, the application of N fertilisers at a rate of 120–150 kg/ha is highly recommended.

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Identifikatorlar

DOI: 10.14719/pst.14648

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