桃茶人工复合系统土温变化特征分析

Study on the Change of Soil Temperature in Peach tea Artificial Compound System and Tea Ecosystem

在浙江省临安市，于１９９３年７、８月份对桃茶人工复合系统和普通茶园同步进行土温测定。结果表明：在桃茶人工复合系统和普通茶园内，土温变化的振幅随深度增加按几何级数减少，位相随深度增加按等差级数落后。土温梯度变化特点与土温变化相似。土温铅直分布可分日射型、辐射型、清晨转换型、傍晚转换型４类。与普通茶园比较，在桃茶人工复合系统内０ｃｍ地温日振幅晴天减少１８．２℃，阴天减少９．７℃；离地面５～２０ｃｍ深处土温日振幅，晴天减少１．３～６．２℃，阴天减少０．６～１．８℃。

The soil temperature observation in different density of peach tea ecosystem and pure tea ecosystem have been made in the summer of 1993 in Linan City,Zhejiang Province. The result indicates that when the depth of the soil increases in the peach tea ecosystem and pure tea ecosystem,the amplitude of temperature decreases in accordance with geometric series and the phase of temperature trailed in accordance with isogap series. The temperature gradiene variation of soil are similar as the variety character of soil temperature. According to the soil temperature variance with the depth of soil,four types of the vertical distribution of soil temperature were divided,namely:(1)solar type,(2)radiation type,(3)transitional type in early morning,(4)transitional type in evening. Compared with the pure tea ecosystem the daily amplitude of earth′s surface temperature at 0 cm,that the tea ecosystem decreases 18.2 ℃ in the clear day and 9.7 ℃ in the cloudy day. Above changes are favourable for increasing fruit trees and tea plants.