Scientific data on emmer wheat’s response to N and water supplies is scarce. Two field experiments were conducted on a group of five emmer wheat landraces (Joneghan, Zarneh, Singerd, Shahrekord, Khoygan), a durum, and a bread wheat genotype. In the first experiment, the genotypes were subjected to 30 (N-limited) and 100 kg N ha^–1 (N-supplied) at non-stress and drought stress conditions. In the second experiment, responses of these genotypes to the mentioned N supplies were studied under dryland and dryland + terminal complementary irrigation conditions. Water deprivation (being either due to the imposed drought stress or the dryland condition) led to decreases in chlorophyll concentration, maximum quantum efficiency of photosystem II, relative water content, grains/spike, spikes/plant, 1000-grains weight, grain yield, plant above-ground dry mass, and N use efficiency of the examined wheat genotypes. However, emmer wheat genotypes tended to vary less in response to water supply at least in terms of a majority of the traits, including grain yield (28–30% vs 40–58% drought-induced decreases for emmer and improved wheats, respectively) and above-ground dry mass (12–17% vs 23–40% drought-induced decreases for emmer and improved wheats, respectively). Increase in N supply led to decreases in grains/spike, spikes/plant, 1000-grains weight, and grain yield of the emmer wheats, despite increases in these grain yield attributes and grain yield of the durum and bread wheats. Results were indicative of greater protein content (15.7 vs 12.4% for non-stressed emmer and improved wheats, respectively) but a smaller grain yield (2985 vs 7275 kg ha⁻¹ for non-stressed emmer and improved wheats, respectively), harvest index, and N use efficiency in the emmer wheats, compared to the durum and bread wheats, across different N and water supplies. Our findings were novel in that the emmer wheat was found more sustained across different water availabilities and no responsive to N levels that are beneficial to the durum and bread wheats.

关于二粒小麦对氮和水供应的反应的科学数据很少。对一组五个二粒小麦地方品种（Joneghan、Zarneh、Singerd、Shahrekord、Khoygan）、一种硬粒小麦和一种面包小麦基因型进行了两次田间试验。在第一个实验中，基因型受到 30（N 限制）和 100 kg N ha ^–1（供氮）在非胁迫和干旱胁迫条件下。在第二个实验中，在旱地和旱地+末端补充灌溉条件下研究了这些基因型对提到的氮供应的反应。缺水（由于施加的干旱压力或旱地条件）导致叶绿素浓度降低、光系统 II 的最大量子效率、相对含水量、谷物/穗状花序、穗状花序/植物、1000 粒重量、粮食产量、植物地上干重和受检小麦基因型的氮利用效率。然而，至少在包括谷物产量在内的大多数性状方面，二粒小麦基因型对供水的反应往往变化较小（二粒小麦和改良小麦的干旱引起的下降为 28-30% 对 40-58%，分别）和地上干重（二粒小麦和改良小麦分别为 12-17% 和 23-40% 干旱引起的减少）。氮供应的增加导致二粒小麦的籽粒/穗、穗/植株、千粒重和籽粒产量下降，尽管硬粒小麦和面包小麦的这些籽粒产量属性和籽粒产量增加。结果表明蛋白质含量更高（非胁迫二粒小麦和改良小麦分别为 15.7% 和 12.4%），但谷物产量较低（2985 和 7275 kg ha^{-1 分别}表示非胁迫二粒小麦和改良小麦）、收获指数和二粒小麦与硬粒小麦和面包小麦相比，在不同的氮和水供应中的氮利用效率。我们的发现是新颖的，因为发现二粒小麦在不同的可用水量下更持久，并且对有利于硬粒小麦和面包小麦的氮含量没有反应。