CAJ | 학술논문

在防雨水泥池栽条件下,以周麦18和济麦20为研究材料,研究水氮耦合对小麦旗叶主要光合特性的影响.试验结果表明:当土壤相对含水量低于40%时,施氮处理小麦旗叶气孔导度降低,胞间CO_2浓度升高,光合速率受非气孔因素制约而降低;当土壤相对含水量为45%～75%时,随着氮肥施用量的增加,小麦旗叶的光合速率、气孔导度不断增加,胞间CO_2浓度逐渐减小,气孔因素制约了光合速率的提高;当土壤相对含水量高于75%时,氮素营养对小麦旗叶光合特性的促进作用减弱.
재방우수니지재조건하,이주맥18화제맥20위연구재료,연구수담우합대소맥기협주요광합특성적영향.시험결과표명:당토양상대함수량저우40%시,시담처리소맥기협기공도도강저,포간CO_2농도승고,광합속솔수비기공인소제약이강저;당토양상대함수량위45%～75%시,수착담비시용량적증가,소맥기협적광합속솔、기공도도불단증가,포간CO_2농도축점감소,기공인소제약료광합속솔적제고;당토양상대함수량고우75%시,담소영양대소맥기협광합특성적촉진작용감약.
Effects of water and nitrogen interaction on main photosynthetic characteristics of wheat variety Zhoumai 18 and Jimai 20 were studied by pool cultivation under the rain proof shelter. The results showed that when the relative soil moisture content was below 40%, stomatal conductance of flag leaves decreased, while moisture intercellular CO_2 concentration increased with the increasing N fertilizer. The decrease of photosynthesis rate was limited by non-stomatal factor. When the relative soil moisture content was between 45% and 75%, with the increasing of N fertilization and SRWC, photosynthesis rate and stomatal conductance of flag leaves increased, while intercellular CO_2 concentration reduced. Increase in photosynthesis rate was limited by stomatal factor. Stimulative effects of nitrogen nutrition on flag leaves photosynthesis of wheat reduced when the relative soil moisture content was higher than 75%.