关键词: 茶树, 铁, 转移系数, 季节动态, 影响因子

Abstract: Plant plays an important role in geo-biochemistry of iron. To understand iron seasonal dynamics in different organs of tea tree and its influence factor in bleached paddy soil, tea trees and corresponding soil in a tea garden were sampled in Mingshan County, Sichuan province in different tea-picking seasons. Iron(Fe_t) content in tea tree and soil, active iron(Fe_o), chelate iron(Fe_p), available iron(Fe_a) in soil were analyzed. Corresponding transfer coefficients(TF_t, TF_o, TF_p and TF_a) of tea tree were also calculated. The results showed that there were obviously differences in iron content among different tea organs, and showed the order as root > leave > stem in total, but leave > root > stem in March. Moreover, the iron content in tea organs was different in different seasons, showing the order as September > July > March > May for root, and September > March > July > May for stem and leave. Significant positive relationships were observed between the soil available iron and leave iron content, between soil organic matter content and TF_p. Additionally, soi humus content displayed significantly relationships with root(or leave) iron content, TF_t, TF_o, TF_p. The results suggested that iron absorption and accumulation of tea was not only affected by soil iron form and their contents, but also related to other soil characters as pH, organic matter and humus content in bleached paddy soil.

Key words: tea tree, iron, transfer factors, season dynamics, impact factors