寒旱农业科学2025，Vol.4Issue(10)：917-921,5.DOI:10.3969/j.issn.2097-2172.2025.10.006
干旱胁迫条件下不同浓度5%调环酸钙对胡麻生长和产量的影响
Effects of Different Concentrations of 5%Prohexadione Calcium on the Growth and Yield of Sesamum indicum under Drought Stress Conditions
摘要
Abstract
To investigate the effects of prohexadione calcium on the agronomic traits and yield of rainfed flax(Sesamum indicum)under drought stress and to identify the optimal foliar application concentration for improving drought tolerance and yield stability,5 concentrations of 5%prohexadione calcium(Pro-Ca at 50,100,150,200 and 250 mg/L,respectively)were tested with distilled water as the control.Results showed that different concentrations of Pro-Ca significantly affected flax growth and economic traits.Under simulated drought conditions,treatment with 150 mg/L 5%Pro-Ca significantly increased plant height,technical length,number of tillers,number of effective capsules per plant,and thousand-seed weight by 16.03%,11.54%,471.43%,28.22%,and 7.93%,respectively,compared with the control.Treatments with 150 and 250 mg/L increased yield by 7.08%and 7.55%,respectively,over the control.Although the yield at 250 mg/L was slightly higher than that in the 150 mg/L treatment,considering yield improvement,input cost,and net benefit,150 mg/L 5%Pro-Ca provided better economic feasibility and extension value by ensuring yield increase while reducing production cost.Soil moisture during the entire growth period of flax showed a gradual drought pattern from top to bottom and from early to late stages.From the budding to green capsule stage,moderate to severe drought persisted,with relative soil moisture in the 40 cm layer decreasing sharply from 39.2%to 7.7%,indicating deep-layer water depletion.Therefore,foliar spraying of 150 mg/L 5%prohexadione calcium solution at the initial flowering stage effectively alleviated drought stress and increased yield,providing a scientific basis for simplifying application rates,improving water-use efficiency,and reducing production costs in rainfed flax cultivation.关键词
调环酸钙/浓度/干旱胁迫/胡麻/生长/产量Key words
Prohexadione calcium(Pro-Ca)/Concentration/Drought stress/Sesamum indicum L./Growth/Yield分类
农业科技引用本文复制引用
史学芬,王占贤,杨钦忠,王树生..干旱胁迫条件下不同浓度5%调环酸钙对胡麻生长和产量的影响[J].寒旱农业科学,2025,4(10):917-921,5.基金项目
国家特色油料产业技术体系(CARS-14-2-10). （CARS-14-2-10）
