In arid and semiarid regions, successful recovery from drought may be of more economic significance than plant productivity during a dry season. This research was conducted to investigate the effects of pre‐drought irrigation and defoliation managements (seed and forage managements) on post‐drought recovery of diverse smooth bromegrass (Bromus inermis Leyss.) genotypes, and to identify growth traits associated with persistence and recovery as indices for selecting superior genotypes. Thirty‐six genotypes were field evaluated in two separate experiments of seed and forage managements during 2013–2015 under well‐watered and deficit irrigation regimes. In the fourth year (2016), irrigation was withheld from both moisture regimes for two months (almost complete senescence) and then plants were re‐watered to find the effect of prolonged drought stress on post‐drought recovery. Pre‐drought irrigation increased persistence of genotypes relative to the well‐watered treatment in the seed management experiment. In the seed management trial, genotypes had greater recovery under deficit irrigation when compared to forage management counterpart. There was no significant difference between seed and forage management experiments under the well‐watered regime in this respect. Positive correlations were observed between recovery after prolonged drought and total aerial biomass, persistence, and winter growth vigor under both irrigation regimes. Superior genotypes were identified as having more productivity, better recovery, higher persistence, and drought tolerance.

中文翻译：

---

水分亏缺和落叶管理对旱生草地草干旱后恢复和持久性的影响

在干旱和半干旱地区，成功地恢复干旱可能比干旱季节的植物生产力更具经济意义。这项研究的目的是调查干旱前灌溉和落叶管理（种子和牧草管理）对各种平滑无芒雀麦（无芒雀麦）干旱后恢复的影响。（Leyss。）基因型，并确定与持久性和恢复相关的生长性状，作为选择优良基因型的指标。在2013-2015年期间，在灌溉条件良好和缺水的条件下，对种子和牧草管理进行了两次单独的试验，对36种基因型进行了现场评估。在第四年（2016年），两种水分处理均停止灌溉两个月（几乎完全衰老），然后对植物重新浇水，以寻找长期干旱胁迫对干旱后恢复的影响。相对于种子管理实验中灌溉良好的处理方式，旱前灌溉增加了基因型的持久性。在种子管理试验中，与饲草管理对应物相比，基因型在亏水灌溉下具有更大的恢复能力。在这方面，在灌溉良好的条件下，种子和牧草管理实验之间没有显着差异。在两种灌溉方式下，长期干旱后的恢复与总空气生物量，持久性和冬季生长活力之间存在正相关关系。优越的基因型被认为具有更高的生产力，更好的恢复能力，更高的持久性和耐旱性。