CAJ | 학술논문

　　研究灌浆期低温条件下，喷施脱落酸、甜菜碱和水杨酸对玉米灌浆中后期光合特性及产量的影响。结果表明，喷施脱落酸降低了叶片的净光合速率，低、中浓度脱落酸处理提高了PSⅡ的光化学效率(Fv/Fm)，高浓度处理使PSⅡ的光化学效率降低，脱落酸处理使产量下降8.0%～14.6%；喷施甜菜碱增加了叶片的净光合速率和PSⅡ光化学效率，甜菜碱处理使产量提高0.9%～6.9%；喷施水杨酸可有效维持并提高玉米叶片的光合性能，除中浓度处理产量较对照增加1.4%之外，其他浓度处理产量下降1.2%～3.4%。喷施脱落酸、甜菜碱和水杨酸主要通过调节千粒重来实现对产量的调控，其中，高浓度甜菜碱(10 mmol/L)在提高光合能力和产量方面表现最优。
　　연구관장기저온조건하，분시탈락산、첨채감화수양산대옥미관장중후기광합특성급산량적영향。결과표명，분시탈락산강저료협편적정광합속솔，저、중농도탈락산처리제고료PSⅡ적광화학효솔(Fv/Fm)，고농도처리사PSⅡ적광화학효솔강저，탈락산처리사산량하강8.0%～14.6%；분시첨채감증가료협편적정광합속솔화PSⅡ광화학효솔，첨채감처리사산량제고0.9%～6.9%；분시수양산가유효유지병제고옥미협편적광합성능，제중농도처리산량교대조증가1.4%지외，기타농도처리산량하강1.2%～3.4%。분시탈락산、첨채감화수양산주요통과조절천립중래실현대산량적조공，기중，고농도첨채감(10 mmol/L)재제고광합능력화산량방면표현최우。
Field experiment was conducted to compare the effect of three chemicals on leaves photosynthesis and grain yield of maize growing under low temperature stress during grain filling stage. The main results showed that spraying of abscisic acid(ABA) reduced the net photosynthesis rate, 30 μmol/L and 10 μmol/L improved the PS II photochemical efficiency(Fv/Fm), while 60μmol/L ABA decreased the PSⅡphotochemical efficiency, and spraying of ABA decreased grain yield by 8.0%-14.6%. The spraying of betaine increased leaves net photosynthesis rate and PSⅡ photochemical efficiency, and spraying of betaine increased yield by 0.9% - 6.9%. Salicylic acid enhanced leaves photosynthesis effectively, but decreased yield by 1.2%-3.4%with the exception of 0.5 mmol/L. Generally, grain yield was mainly affected due to the regulation on grain weight by spaying of chemicals. High concentration of betaine (10 mmol/L) was the optimal treatment concerning the improving of the leaves photosynthesis and grain yield.