Abstract Maize response to deficit water and nitrogen for assessing phenological development and yield was studied under semi-arid conditions. Experiment consisting three drip irrigation levels, replenish 60 (DI60), 80 (DI80) and 100 percent (DI100) of cumulative pan evaporation, and four nitrogen doses 50 (RN50), 75 (RN75), 100 (RN100) and 125 (RN125) per cent of recommended nitrogen. A Furrow irrigated treatment was kept as control/check. Significant earliness in visibility of collar of 8th leaf, tasseling, silking and significant delay in dough stage and physiological maturity was recorded under well water treatment DI100 as compared to DI60. Days to collar of 8th leaf, tasseling and silking had significant negative correlation, and duration of yield formation phase and days to physiological maturity had significant positive correlation with grain yield. Higher DM production, longer yield formation phase and late physiological maturity led to significantly higher grain yield under DI100. In case of nitrogen levels, phonological characteristics like collar of 8th leaf, tasseling and silking were significantly delayed, and dough stage and physiological maturity were advanced under nitrogen deficit treatment RN50 as compared to RN100 and RN125. Significantly higher dry matter production and longer yield formation phase observed led to significant higher SCY under RN100 and RN125 as compared to RN50. Yield formation phase was significantly longer under drip irrigated crop as compared to control during 2nd year of study. Crop phenological development significantly affected by drip irrigation regimes and nitrogen levels, and there was significant correlation between phenological stages development and grain yield.

中文翻译：

---

滴灌和施氮改变半干旱条件下春玉米 (Zea mays L.) 物候发育和产量

摘要 研究了半干旱条件下玉米对缺水缺氮的响应，以评估物候发育和产量。实验包括三个滴灌水平，补充 60 (DI60)、80 (DI80) 和 100% (DI100) 的累积锅蒸发量，以及四种氮剂量 50 (RN50)、75 (RN75)、100 (RN100) 和 125 (RN125) ) 推荐氮的百分比。保留沟灌溉处理作为对照/检查。与 DI60 相比，井水处理 DI100 记录了第 8 叶领的可见性显着提前，流苏、抽丝以及面团阶段和生理成熟的显着延迟。8叶领天数、抽穗和抽丝呈显着负相关，产量形成期和生理成熟天数与籽粒产量呈显着正相关。较高的干物质产量、较长的产量形成阶段和较晚的生理成熟导致 DI100 下谷物产量显着提高。在氮水平的情况下，与RN100和RN125相比，在氮缺乏处理RN50下，第8叶领、雄蕊和抽丝等语音特征显着延迟，面团阶段和生理成熟提前。与 RN50 相比，在 RN100 和 RN125 下观察到的显着更高的干物质产量和更长的产量形成阶段导致显着更高的 SCY。在研究的第 2 年，与对照相比，滴灌作物的产量形成阶段明显更长。