【摘要】 在盆栽条件下,研究喷施亚硫酸氢钠(NaHSO3)对小麦生殖生长时期光合速率、光呼吸速率及氮素代谢的影响。结果表明:小麦旗叶光呼吸速率与光合速率表现为平行变化,且始终保持为光合速率的30%左右,其变化相对光合速率变化滞后约1h;喷施NaHSO3可以抑制小麦旗叶光呼吸从而提高光合速率,最适喷施浓度为10mmol L-1;喷施NaHSO3虽然可以提高小麦碳素同化,增加籽粒产量,但却不利于氮素同化,造成籽粒蛋白质含量下降。更多还原

【Abstract】 Under field conditions,the effect of spraying NaHSO₃ on photosynthesis rate,photorespiration rate and nitrogen metabolism of wheat at reproductive stage were studied.Results showed that photorespiration rate always varied in correspondence with photosynthesis rate.There existed a ratio between the two: the former was roughly 30% of the latter.And it was found that photorespiration rate varied with 1h of delay after photosynthesis rate.The photorespiration rate was inhibited and the photosynthesis rate was increased by spraying NaHSO₃.The optimum concentration of spraying was 10mmol L^-1.Spraying NaHSO₃ on wheat increased carbon assimilation of wheat and the yield of grain,however,nitrogen assimilation declined,which might result in the decrease of protein content in kernel.更多还原