Abstract:

In order to explore the effects of animal-derived organic fertilizer on the soil and tea growth and quality of tea plantations, four treatments were set up under the field test conditions of no fertilization (ZY_CK) within one year, compound fertilizer (ZY_FHF), shrimp fertilizer (ZY_XF) and meat fertilizer (ZY_RF), and the yield, quality and soil nutrients of tea were detected and analyzed, and the bacterial community structure of the soil of tea plantation was determined by Illumina Novaseq 6000 high-throughput sequencing technology. The results showed that the application of meat fertilizer could obviously increase the 100-bud weight and yield of tea, which were 11.20 g and 1 884.05 kg·hm^-2 higher than those of CK treatment. Compared with CK, fertilization could increase the contents of amino acids, caffeine and tea polyphenols in tea, and the sensory evaluation results showed that meat fertilizer treatment had the best effect. Besides, the application of shrimp fertilizer and meat fertilizer in tea plantations could increase the contents of soil total nitrogen, organic matter and hydrolyzable nitrogen, and improve soil fertility in tea plantations. In terms of bacterial community, the composition of soil bacteria was dominated by Proteobacteria and Actinomycetes, and the total number of soil bacterial opertational taxonomic unit (OTU) was the highest in meat fertilizer treatment, and the alpha diversity of bacterial community was obviously increased, indicating that meat fertilizer application could improve the diversity of soil bacterial community. Overall, the effect of meat fertilizer treatment is more satisfactory.

Key words: animal-derived organic fertilizers, tea, yield, quality, soil nutrients, bacterial community