Deficit and erratic precipitation in arid regions and imbalance nitrogen (N) fertilization can result in lower yield and nutritional quality of fodder maize. The objectives of the experiment were to investigate the effect of N (urea 46% N) rates i.e., 225 (N₁), 300 (N₂) and 375 kg N ha^–1 (N₃) under 600 (W₁) and 900 mm ha^–1 (W₂) supplemental irrigation levels on the greenhouse gas (GHG) emissions, yield and nutritional quality of fodder maize. The treatments combination comprised of N₁W_1, N₂W_1, N₃W_1, N₁W_2, N₂W₂ and N₃W₂. N fertilization and supplemental irrigation levels significantly affected soil moisture content (SMC) and soil temperature (ST), whereas maximum SMC and minimum ST were recorded in N₃W₂. Increasing N rate decreased soil ammonium nitrogen content (NH₄⁺-N) and increased nitrate nitrogen content (NO₃^–-N) and maximum NH₄⁺-N was recorded in N₁W₁ and maximum NO₃^–-N in N₃W₁. Methane (CH₄) uptake was higher in W₁ compared with the W₂, and maximum CH₄ uptake was recorded in N₃W₁ followed by N₃W₂. Nitrous oxide (N₂O) and carbon dioxide (CO₂) emissions were higher in W₁ compared with the W₂, and maximum N₂O and CO₂ emissions were recorded in N₃W₁. Cumulative emission of N₂O and CO₂, CH₄ uptake, global warming potential (GWP), and greenhouse gas intensity (GHGI) were higher in W₁ compared with W₂ and their maximum values were recorded in N₃W₁. Treatment N₃W₂ significantly improved the forage yield and nutritional quality of fodder maize by improving the crude protein content and ether extract content, while reducing neutral detergent and acid detergent fibers contents. In conclusion, treatment N₃W₂ improved SMC, forage yield, grain yield, and nutritional quality of fodder maize as well as reduced GHG emissions, GWP and GHGI in an arid region.

干旱地区降水不足和不稳定以及氮（N）施肥不平衡会导致饲料玉米的产量和营养品质降低。实验的目的是研究 N（尿素 46% N）率的影响，即 225（N ₁）、300（N ₂）和 375 kg N ha ^–1（N ₃）在 600（W ₁）和900 mm ha ^–1 (W ₂ ) 补充灌溉水平对饲料玉米的温室气体 (GHG) 排放、产量和营养品质的影响。处理组合包括 N ₁ W _1、 N ₂ W _1、 N ₃ W _1、N ₁ W _2、 N ₂ W ₂和 N ₃ W ₂。N施肥和补充灌溉水平显着影响土壤含水量（SMC）和土壤温度（ST），而最大SMC和最小ST记录在N ₃ W ₂中。增加 N 速率会降低土壤铵态氮含量 (NH ₄ ⁺ -N) 并增加硝酸盐氮含量 (NO ₃ ^{– -N)，N} ₁ W ₁记录到最大 NH ₄ ⁺ -N，N 记录到最大 NO ₃ ^– -N ₃瓦₁. _{与 W 2}相比， W ₁中甲烷 (CH ₄ ) 的吸收量更高，最大 CH ₄吸收量记录在 N ₃ W ₁中，其次是 N ₃ W ₂ 。_{与 W 2}相比， W _1中的一氧化二氮 (N ₂ O) 和二氧化碳 (CO ₂ ) 排放量较高， N ₃ W ₁中记录了最大的 N ₂ O 和 CO ₂排放量。_{N 2} O和CO ₂ , CH ₄的累积排放_{与 W 2}相比， W ₁的吸收、全球变暖潜能值 (GWP) 和温室气体强度 (GHGI) 更高，并且它们的最大值记录在 N ₃ W ₁中。N ₃ W ₂处理通过提高粗蛋白含量和醚提取物含量，同时降低中性洗涤剂和酸性洗涤剂纤维的含量，显着提高了饲料玉米的草料产量和营养品质。总之，在干旱地区，N ₃ W ₂处理提高了饲料玉米的 SMC、草料产量、谷物产量和营养品质，并降低了 GHG 排放、GWP 和 GHGI。