喷施外源氨基酸对水稻的生长发育具有重要影响。为深入探究破口期喷施谷氨酸对水稻生理特性和产量的影响，本试验选取香稻品种美香占2号和青香优19香作为研究对象，并设计了5个不同的谷氨酸喷施浓度：CK，0 g/L；T1，0.7 g/L；T2，1.4 g/L；T3，2.1 g/L；T4，2.8 g/L。结果表明，与CK相比，T2处理下的美香占2号和青香优19香产量分别显著提高7.27%和22.01%，结实率分别显著提高9.32%和7.94%。同时，T2处理显著提升了美香占2号和青香优19香的光合速率、干物质积累量以及氮代谢酶活性。综上所述，于水稻破口期喷施浓度为1.4 g/L的谷氨酸，不仅能有效提升水稻的产量，还能显著改善其生理特性。

The application of exogenous amino acids has a significant impact on the growth and development of rice. To further explore the effects of spraying glutamate during the rupturing stage on yield and physiological characteristics of rice, this study selected the aromatic rice varieties Meixiangzhan 2 and Qingxiangyou 19 xiang as research subjects, and designed five different concentrations of glutamate spraying: CK, 0 g/L; T1, 0.7 g/L; T2, 1.4 g/L; T3, 2.1 g/L; T4, 2.8 g/L. The results showed that compared with CK, the yields of Meixiangzhan 2 and Qingxiangyou 19 xiang under the T2 treatment significantly increased by 7.27% and 22.01%, respectively, and the seed setting rates significantly increased by 9.32% and 7.94%, respectively. Meanwhile, the T2 treatment significantly enhanced the photosynthetic rate, dry matter accumulation, and nitrogen metabolism enzyme activity of Meixiangzhan 2 and Qingxiangyou 19 xiang. In conclusion, spraying glutamate at a concentration of 1.4 g/L during the rupturing stage of rice can not only effectively increase the yield but also significantly improve the physiological characteristics of rice.