关键词: 黑稻, 洋黑3号, 农艺性状, 花青苷色素, 产量

Abstract:

 Black rice anthocyanin pigment is the main substance of black rice seed coat and glume coloration. It is a plant polyphenol compound and has many physiological activities such as antioxidation, improvement of microcirculation, and improvement of visual acuity. In this study, Yanghei 3 was used as material to study the effects of environmental factors such as effective accumulated temperature, altitude and sowing time on anthocyanin production during the development of caryopsis in black rice, and the effects of external environmental factors such as temperature and altitude on the yield and anthocyanin production of black rice. The results showed that, anthocyanins had a time-lapse in the carob peel deposition, and the black rice anthocyanin accumulation was in the milk ripening stage and the wax ripening stage, and the main accumulation time was 2~4 weeks after heading; the high air temperature is not conducive to the coloration of caryopsis, moderate temperature can prolong the coloring time of caryopsis, select the appropriate sowing time, make the caryopsis growth period of rice plants in strong light, the average temperature is 21°C~23°C, the large temperature difference in the fall between day and night would increase the yield and the content of anthocyanins; Yanghei 3 is suitable for growing in the area below 800 m altitude, the most suitable area is the area below 700 m altitude. In the plain region with altitude below 500 m, the suitable time for seeding of black rice variety is in the middle of April, the suitable time for seeding is in the late first ten-days period of April in 500~600 m altitude area and the suitable time for seeding is in the early April in the 600~700 m altitude area.

Key words: black rice, Yanghei 3, agronomic traits, anthocyanin pigment, grain yield