Abstract:

To evaluate the application effect of composite microbial ecological agents on Tieguanyin tea plants and provide technical support for green production of tea garden，six-year-old Tieguanyin tea plants were used as test materials. Five treatments were established based on conventional technical management：T1，bio-organic fertilizer；T2，anti-replanting microbial agent + bio-organic fertilizer；T3，Lyukangwei + bio-organic fertilizer；T4，anti-replanting microbial agent + Lyukangwei + bio-organic fertilizer； T5（CK），no microbial agent application. Agronomic traits，yield，and tea quality components were measured. The results showed that T4 showed the best effect，with a significant（p<0.05）increase in relative chlorophyll content（SPAD value）of tea leaves by 15.7%，a significant increase in fresh weight of 100 leaves by 13.3%，and a significant increase in yield by 16.3% compared with CK. At the same time，tea polyphenols，epigallocatechin gallate（EGCG），and amino acid content were significantly increased by 3.4，2.73，and 0.42 percentage points，respectively，compared with CK. The sensory evaluation score reached 94.3 points. The composite microbial agent combination of anti-replanting microbial agent + Lyukangwei + bio-organic fertilizer can effectively promote the growth of Tieguanyin tea plants and improve tea quality by enriching quality components，making it a suitable green production technology for tea gardens.

Key words: microbial ecological agent, tea plant, Tieguanyin, yield, quality, green production