水稻抗旱性节水性鉴定方法研究

目的]研究水稻抗旱性节水性鉴定方法。方法]试验共设5个灌溉梯度处理,分别为最大灌溉量(0 k Pa为最大灌溉量)用水量的100%(CK)、90%、80%、70%和60%,通过产量、株高和根长性状评价水稻的抗旱节水性程度。结果]在供水量逐渐降低条件下,其株高降低、根长增加。通过产量分析与农艺性状分析发现,H518与对照旱优73表现较为一致,说明H518节水抗旱。结论]该抗旱性鉴定方法简便、快捷、可靠,为发展稻作的节水、旱作栽培技术提供理论依据。

Evaluation Method for Drought Resistance and Water Saving of Rice

Objective] To research the evaluation method for drought resistance and water saving of rice.Method] Five irrigation treatments were designed,which were 100％ (0 kpa maximum water irrigation,CK),90％,80％,70％ and 60％.Tbe yield,plant height and root length were used to evaluate the water conservation and drought resistance of rice.Result] Under the condition of gradually decrease of water supply,the plant height reduced but root length enhanced.Yield analysis and agronomic characters analysis showed that H518 and Hanyou 73 (CK) had the almost the same performance,indicating that H518 was water saving and drought resistance.Conclusion] This method was simple,rapid and reliable,and provided theoretical basis for the water saving and dry farming technology of rice.