Abstract:

In order to improve the soil quality of tea gardens, a series of soils of different tea planting years were collected in this study to explore the changes of soil quality of tea gardens in Fuyang District of Hangzhou with tea planting years. According to the evaluation criteria of soil nutrients proposed by the second national soil survey, the nutrient abundance and deficiency of tea garden soil samples were evaluated. The single factor pollution index method and Nemerow comprehensive pollution index method were introduced to evaluate the metal pollution. The results showed that perennial tea planting would lead to a decrease in soil pH value, while organic matter content in soil increased with the increase of tea planting years, available phosphorus showed a decreasing trend, total nitrogen and available potassium contents increased first and then decreased. The content of available iron, available manganese, available zinc and available copper in trace elements increased. The results of this study can provide data support for better fertilizer application, fertility maintenance and soil improvement.

Key words: tea garden soil, soil acidification, heavy metal pollution, soil fertility