关键词: 江西茶园, 菜籽饼肥, 施肥深度, 氮素利用率, 产量

Abstract: To study the effects of organic fertilizer depth on yield, quality and nitrogen utilization in Jiangxi tea area, rapeseed cake fertilizer was selected as fertilizer and Camellia sinensis Fuding Dabaicha was as the tea variety. No fertilizer treatment (CK0) and conventional fertilization depth 30 cm (CK) were as control，and the fertilization depths were set as 0 (FD1), 10 (FD2), 20 (FD3), 40 (FD4) and  50(FD5) cm. The yield, quality and nitrogen utilization of tea plant were determined systematically. The results showed that, comparing with CK, the budding density of FD1, FD2, FD3, FD4 and FD5 decreased 9.46%, 5.75%, 2.78%, 15.03% and 26.72%. The germination density of FD1, FD2, FD3 and CK treatments were significantly higher than FD5. The effects of fertilization depth were not significant on the contents of caffeine and amino acid. The application of rapeseed cake fertilizer increased the soil pH and content of organic matter with increasing range of 33.73%~75.46%. Through curve simulation, the optimal tea yield had been obtained with fertilization depth 17.46 cm, the partial productivity of nitrogen fertilizer was the highest with fertilization depth 17.27 cm, and the nitrogen agronomic efficiency and using efficiency were best with fertilization depth 11.99 and 13.25 cm, respectively. So, the fertilization depth of rapeseed cake fertilizer was ranged from 11 to 18 cm, which was more conducive to release and utilization of nitrogen in tea garden.

Key words: Jiangxi tea garden, rapeseed cake fertilizer, fertilization depth, nitrogen use efficiency, yield