Abstract:

To clarify the performance of yield and quality of rice cultivar Jiahexiang 1 in Yuhang District, Hangzhou City, a comparative experiment with different fertilization methods was conducted in 2022 and 2023, respectively. The results showed that in 2022, treatment 1 (basal application of controlled-release organic fertilizer) promoted early tillering but was unfavorable to panicle formation at later stages. Treatment 2 (reduce application rate of controlled-release organic fertilizer in 2 splits) showed no promotion effect on either early tillering or late panicle formation. Treatment 4 (applying inorganic compound fertilizer in 2 splits) exhibited superior performance in panicle number, total grains per panicle, filled grains per panicle, and 1 000-grain weight, resulting in the highest yield. Treatment 3 (applying inorganic compound fertilizer in 3 splits) ranked second in yield, however, it showed the lowest chalkiness degree and chalky grain rate, with both chalkiness and transparency grades reaching the first class. It also had the lowest amylose content (first-class grade) and the lowest protein content, indicating better comprehensive quality. In 2023, treatment 6 (applying inorganic compound fertilizer with increased nitrogen rate) achieved the highest yield, followed by treatment 5 (“one basal plus one topdressing” application of controlled-release organic fertilizer), while treatment 4 had the lowest yield. Treatment 5 showed the highest brown rice rate and milled rice rate, as well as the lowest chalkiness degree, indicating relatively better processing and appearance quality. In conclusion, applying inorganic compound fertilizer in 3 splits in 2022 or using the “one basal plus one topdressing” method with Haolegeng controlled-release organic fertilizer in 2023 helped Jiahexiang 1 improve the comprehensive quality. This study provides a theoretical basis for the promotion and cultivation of this rice cultivar in Yuhang District.

Key words: rice, Jiahexiang 1, yield, quality, fertilization