Soil Physical and Chemical Properties and Tea Qualities of Different Age Stages of Tea Trees

ZHOU Jin

doi:10.15933/j.cnki.1004-3268.2015.04.016

Abstract：The soil physical and chemical properties and the tea quality of different age stages of tea trees were studied by field sample and indoor analysis to provide theoretical guidance for tea cultivation and management. The results showed that with the increase of growing year of tea tree,the crown breadth, basal diameter and branch number of tea trees increased first and then decreased;the density of tea tree decreased;maximum water holding capacity,capillary water holding capacity,conductivity,coarse sand and fine sand contents gradually increased;capillary porosity,noncapillary porosity,very fine sand and clay powder contents gradually decreased;soil moisture content and bulk density increased first and then decreased,the 15 years old tea tree had the highest value,the orders were 15 a > 20 a > 10 a > 5 a;soil pH value first decreased and then increased,the 15 years old tea tree had the lowest value;soil nutrients contents and tea qualities,including crude protein content,crude fat content,crude fiber content,crude ash content and nitrogen free extract content,increased first and then decreased,the orders were 15 a >20 a > 10 a > 5 a,suggesting that tea trees had an function of accumulation for soil nutrient and improve-ment for the quality of tea;the rangeability of soil available nutrients contents were higher than that of to-tal soil nutrients contents. Overall,the growing process of tea trees could facilitate the improvement of soil fertility and soil environment,and which needed a long time.