Fragrant rice is popular among the public because of its distinctive fragrant smell. To explore the effects of different harvest time on yield, quality, and aroma-related substances of fragrant rice in the after full heading stage. Under field conditions, we used a completely randomized block design. Using fragrant rice: Xiangyaxiangzhan (XY), Meixiangzhan-2 (MXZ), 19Xiang (19X) as materials, sampling was conducted within one week before maturity and the determination of fragrant rice yield and grain quality at different harvest times. 2-Acetyl-1-Pyrroline (2-AP), Pyrroline-5-carboxylic acid synthetase (P5CS), Pyrroline-5-carboxylic acid (P5C), Proline, Proline dehydrogenase (PDH), Ornithine aminotransferase (OTC) are the related aspects on which we worked on. The results showed that the head rice rate increased significantly with harvest time extension. However, the protein and amylose content in fragrant rice was significantly reduced. In addition, the activity of P5CS showed a decreasing trend, and the content of P5C in the grains showed an increasing trend, the activity of OTC, 2-AP and proline in the grains showed a parabolic trend. Overall, the harvest time within a week had no significant effect on the yield of fragrant rice, but it did affect the aroma accumulation and quality of fragrant rice. The aroma accumulation of different varieties is different, the timely harvest of rice should be considered a variety.

中文翻译：

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收获时间对香米产量、品质和香气的影响

香米因其独特的香味而深受大众喜爱。探讨不同收获时间对香米抽穗后产量、品质及香气相关物质的影响。在田间条件下，我们使用了完全随机的区组设计。以香米香稻香米：香稻香米（XY）、梅香香-2（MXZ）、19香（19X）为材料，在成熟前1周内取样，测定不同收获时期香米产量和籽粒品质。2-乙酰基-1-吡咯啉 (2-AP)、吡咯啉-5-羧酸合成酶 (P5CS)、吡咯啉-5-羧酸 (P5C)、脯氨酸、脯氨酸脱氢酶 (PDH)、鸟氨酸氨基转移酶 (OTC) 是相关的我们工作的方面。结果表明，随着收获时间的延长，整精稻率显着提高。但香米中的蛋白质和直链淀粉含量明显降低。此外，P5CS活性呈下降趋势，籽粒中P5C含量呈上升趋势，籽粒OTC、2-AP和脯氨酸活性呈抛物线趋势。总体而言，一周内的收获时间对香米的产量没有显着影响，但确实影响了香米的香气积累和品质。不同品种的香气积累是不同的，及时收割水稻应考虑品种。籽粒中P5C含量呈上升趋势，籽粒OTC、2-AP和脯氨酸活性呈抛物线趋势。总体而言，一周内的收获时间对香米的产量没有显着影响，但确实影响了香米的香气积累和品质。不同品种的香气积累是不同的，及时收割水稻应考虑品种。籽粒中P5C含量呈上升趋势，籽粒OTC、2-AP和脯氨酸活性呈抛物线趋势。总体而言，一周内的收获时间对香米的产量没有显着影响，但确实影响了香米的香气积累和品质。不同品种的香气积累是不同的，及时收割水稻应考虑品种。