Effects of spraying Indonesian foliar fertilizer on growth and quality of tea in red soil region of southern China

Abstract

In order to explore the application effect of BioSilAc solid foliar fertilizer and OBFs liquid foliar fertilizer produced by Indonesia Institute of Biotechnology and Bio-industry on tea plantations in red soil region, a field plot experiment was conducted to study the effects of spraying BioSilAc and OBFs on the morphological indexes of tea garden, fresh tea outputs and contents of biochemical components of tea in red soil region of southern China. Results showed that spraying BioSilAc and OBFs could increase bud density by 14.4%-24%, 100 buds’ weight of tea by 17.0%-33.9%, internode length by 9.5%-23.8% and leaf area by 6.9%-23.1%, respectively; The yield of autumn tea and spring tea increased by 2.4%-6.7% and 13.1%-24.7% respectively, and the total yield of fresh tea was increased by 7.1%-14.5%; The contents of tea polyphenols, amino acids, caffeine and water extract were increased by 8.3%-24.0%, 19.0%-47.6%, 3.5%-19.7% and 13.2%-31.3%, respectively. Among them, treatment of CF+OBFs had the best effect on improving the morphological indexes of tea gardens, promoting the yield and increasing the content of biochemical components of tea.