【摘要】 为获得寒旱区温室辣椒生产中适宜的水氮用量指标，以辣椒品种“陇椒3号”为试材，设置3个灌水量与3个施氮量水平，研究不同水氮处理对辣椒光合特性、产量和品质的影响。结果表明，采用灌水量为田间持水量的65%～80%、施氮量372.90 kg/hm²的水氮处理组合时，辣椒植株保持较强的光合作用，其光合速率、蒸腾速率、胞间CO₂和气孔导度最大，分别为16.58μmol/（m²·s）、8.63μmol/（m²·s）、265.00 mmol/（m²·s）与356.00 mmol/（m²·s）,辣椒株高、茎粗、单株结果数、单株产量及折合产量也最高，分别为112.19 cm、1.46 cm、26.47个、1.46 kg与73.12 t/hm²,显著高于其他处理；同时W2N2处理下辣椒品质指标也表现最优。综合试验结果表明，W2N2水氮组合可促进辣椒生长与光合作用，显著提高辣椒产量与品质，为寒旱区温室辣椒实现高产优质化生产提供理论指导。更多还原

【Abstract】 In order to obtain suitable water and nitrogen dosage indicators for greenhouse pepper production in cold and arid areas, the pepper variety Longjiao No.3 was used as the test material, and three levels of irrigation and nitrogen application were set to study the effects of different water and nitrogen treatments on the photosynthetic characteristics, yield, and quality of pepper.The results showed that adopting a water-nitrogen treatment combination with an irrigation amount of 65%-80% of the field capacity and a nitrogen application rate of 372.90 kg/hm², pepper plants maintained strong photosynthesis, with the highest values of photosynthetic rate, transpiration rate, intercellular CO₂, and stomatal conductance, which were 16.58 μmol/（m²·s）, 8.63 μmol/（m²·s）, 265.00 mmol/（m²·s）, and 356.00 mmol/（m²·s）, respectively. The numerical indicators of pepper plant height, stem thickness, number of fruits per plant, yield per plant, and yield per hectare were also the highest, with values of 112.19 cm, 1.46 cm, 26.47, 1.46 kg, and 73.12 t/hm², respectively, which were significantly higher than those of other treatments; under W2N2 treatment, the quality indicators of peppers also showed the best performance. The comprehensive experimental results indicate that the use of a water nitrogen combination composed of W2N2 can promote the growth and photosynthesis of chili peppers, and significantly improve their yield and quality. These results provide theoretical guidance for achieving high-yield and high-quality production of peppers in cold and arid regions.更多还原