Effects of Sowing Date and Enhancing Fragrance Fertilizer on Yield,Quality and Fragrance of Aromatic Rice with High Quality

WEI Qiao; LIN Jiao; LUO Dongyu; QIAO Fengsheng; HOU Ling; WU Jiping; LI Junli; MU Qilin; CHEN Yanmei; ZHOU Jiahua; CHENG Jianping; TIAN Xiaohai

doi:10.15933/j.cnki.1004-3268.2024.11.006

Abstract：The effects of sowing dates[conventional sowing date(S1)and delayed sowing date(S2)]and enhancing fragrance fertilizer[no enhancing fragrance fertilizer(conventional fertilization,F1)and enhancing fragrance fertilizer(F2)]on yield,quality and fragrance of major aromatic rice varieties[Yexiangyouyousi(V1),19xiang(V2)and Huaxiaxiangsi(V3)]were studied in Hubei Province,so as to provide a scientific basis for the production of high-quality fragrant rice.The results showed that the high temperature and heat damage could be avoided or alleviated by delaying the sowing date,and the initial heading stage was postponed to mid-to-late August after delaying the sowing date.The processing quality and appearance quality of aromatic rice improved,and the content of aromatic substance 2-AP in brown rice significantly increased by 12.14％—162.84％after delaying the sowing date.The processing quality of aromatic rice could be improved by adding enhancing fragrance fertilizer,but the appearance quality was slightly affected.Meanwhile,the content of aroma substance 2-AP in brown rice could be increased by 6.19％—40.60％.Daily maximum temperature was negatively correlated with chalky grain rate and chalkiness,total rainfall was extremely positively correlated with yield and 2-AP content in brown rice,and daily maximum temperature,daily minimum temperature and days of daily maximum temperature≥35 ℃ were extremely negatively correlated with 2-AP content in brown rice.Overall,delayed sowing date and enhancing fragrance fertilizer are beneficial to improving the processing quality and enhancing fragrance,but the enhancing fragrance fertilizer needs to be properly combined according to the characteristics of aromatic rice varieties and sowing date to achieve better results.