扬州市茶园土壤现状分析简报

A report on soil properties in tea gardens of Yangzhou City

本文研究了扬州主要产茶区13个代表性茶园48个样品的土壤理化性质。结果显示:(1)成龄茶园土壤酸度适宜,个别老茶园土壤过度酸化而幼龄茶园存在土壤偏中性和微碱性的问题。(2)土壤有机质符合Ⅰ级的土样为38个,占比达79.2%。(3)土壤氮素水平为Ⅱ级的居多,13个茶园土壤有效磷的平均含量均达到Ⅰ级,但幼龄茶园的氮磷含量总体偏低。为了保持较高的土壤肥力,建议重视老茶园土壤酸化治理和幼龄茶园的碱化调节,增施有机肥且补充锌、镁等微量元素,合理间作绿肥和以生物防治代替施用农药。

The soil physicochemical properties of 48 soil samples from 13 tea gardens in the major tea-producing areas of Yangzhou were investigated.The results showed that:(1)The tea soil acidity of mature tea plants was appropriate for tea growing,while that of partial old tea fields is excessively acidic and those of young tea fields were usually slightly alkaline or neutral;(2)soil organic matter in 38 soil samples(79.2%)reached to level Ⅰ;(3)soil nitrogen levels in most samples were levelⅡ,and the average content of effective soil phosphorus in all tea fields reached level Ⅰ,but the total contents of nitrogen and phosphorus in young tea fields were low.In order to maintain high soil fertility,it is recommended to alkalize the strong acidic old tea soils and to acidify alkaline young tea soils,to increase the application of organic fertilizer and supplement trace elements such as zinc and magnesium,to rationally intercrop green manure plants and reduce pesticides application through biological control.