| Abstract: In order to analyze the benefits of flowering Chinese cabbage cultivated in winter in the Pearl River Delta region, rape cultivar 'Xiwang 669' was took as the material, and were sown in Jiangmen Xinhui District of Guangdong Province by direct seeding method, and the quality differences of flowering Chinese cabbage in the suitable picking period under different sowing dates (15 days after rice harvest and 3 days before rice harvest) was analyzed and compared. The results showed that there were significant differences in the quality of rape at different growth stages under different sowing dates, which were slightly better than that of common cabbage. Among them, in the suitable picking period before the early flowering stage (during the Spring Festival), the biomass per unit area of rape, the vitamin C content, the soluble protein content, and the SPAD value of flowering Chinese cabbage sowing before rice harvest were higher than that of sowing after harvest, but the cellulose content was lower than that of sowing after harvest. After the early flowering stage, the soluble sugar content of flowering Chinese cabbage sowing before rice harvest was higher than that of sowing after rice harvest. The vegetable harvest period of winter flowering Chinese cabbage under two sowing dates coincided with the shortage period of vegetable market demand in the Pearl River Delta region. Therefore,
winter rape could adjust the effective supply of flowering Chinese cabbage in the Spring Festival market, and
have better social and economic benefits. |