Study on the Microclimate Effects in Different Tree-tea lntercropping Mokels and Pure Tea Plantation

The microclimate observation in the Chinese fir-tea, hairy chestnut-tea intercropping models and pure tea plantation have been made in the summer of l992 in Huangshan City,Anhui Province. The result indi-cate that when the plant covering level increases in tea plantation intercropp-ing with trees, the relative intensity of illumination,air temperature,soil temperature,temperature differentiation between day and night,and wind speed decrease,but air humidity increases.In Chinese firtea,hairy chestnut-tea and pure tea plantations,the relative intensity of illumination is 41%, 63%,and,100% respectively;average day air temperature 25.0℃,26.4℃ and 27.2℃ respectively;soil temperatures differentiation(0 cm) between day and night 6.4℃,10.5℃ and l9.7℃ respectively;average wind speed at the height of 200 cm 0.3 ms-1,0.4 ms-1 and 0.6 ms-1 respectively;Compared with that of the pure tea plantation,the relative humidity and absolute one of Chinese fir-tea intercropping models increase 6% and 4 hpa respectively;the hairy chestnut-tea intercropping model's does 4% and 2 hpa respedtively.