Effect of Foliar Application of ProAmin, ProSulfa and ProMic fertilizers on the quantitative and qualitative yield of Iranian tea

Articles in Press

Document Type : Research

Authors

1 Tea Research Center, Horticultural Science Research Institute, AREEO, Lahijan, Iran

2 Tea Research Center ,Horticultural Sciences Research Institute, Agricaltural Research, Educational Extension Organization(AREEO),Lahijan, Iran

3 Tea Research Center

10.22092/rhsj.2024.362752.1066

Abstract

This project aims to investigate foliar application of different concentrations of proamine, prosulfa and promic fertilizers produced by Payacorp Company on yield and quality of green tea leaves to select the best foliar application dose for in two tea gardens of Tea Research Center as split plot in time with plan Base of CRBD with three treatments T1: no foliar feeding (control) T2: foliar spraying with mixture of ProAmin(0.5%) + ProSulfa(0.5%) +ProMic(0.2%) T3: foliar feeding with mixture of ProAmin fertilizers(1%) )+ProSulfa (1%)+ProMic(0.4%) were performed. Sparying was done in early June and September after each harvest. In each harvest, yield was calculated and nutrients concentration, water extract, tannin and total ash were measured in each harvest. Leaf samples was transferred to miniature laboratory for tea processing. The made tea was taste by specialized taster. Mean comparison showed that T2 and T3 increased green leaf yield by 16, 29% and shoots number by 15.7% and 10.9%, respectively compared to control. The results showed that foliar spraying has increased concentration of N and Fe by 5% and 7%, respectively. Fertilizer treatments caused significant decrease in shoot P concentration compared to control. The results showed that tea made from leaves of treated plants with both fertilizer levels has a higher sensory score than control. The highest amount of water extract was observed in T3, but tannin and total ash were not affected by fertilizer. In tea made from leaves of T3 treatment, amount of thearubigins and theaflavins is higher than that of control treatment. It can be concluded that foliar spraying had positive effect on quantity and quality of green leaves compared to the control. Considering greater effect that T2 treatment has on weight of green leaves, it can be promoted as a superior treatment for use in a wider range of tea gardens.

Keywords

Research in Horticultural Sciences

Articles in Press, Accepted Manuscript
Available Online from 05 February 2025

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