不同郁闭度对茶树净光合速率及茶园生态因子的影响

Study on Influence of Different Canopy Density on Camellia sinensis var.pubilimba Net Photosynthetic Rate and Garden Ecological Factors

以安徽省金寨县栗茶间作园为研究对象,对不同郁闭度条件下茶树的净光合速率及茶园生态因子进行测定。结果表明:6月,露地茶园(对照)茶树的净光合速率在13∶00时出现"光合午休"现象,而有遮荫的茶园均未出现"光合午休"现象。在遮荫情况下,气温、土壤温度均低于露地茶园,且郁闭度越大温度越低;而空气湿度和土壤湿度均高于对照纯茶园,且郁闭度越大湿度越大。在郁闭度0.3的林下最有利于茶树生长和茶叶品质的提高。

In the present investigation ,the chestnut-tea intercropping garden located Jinzhai County in Anhui Province was selected as the research object and the temperature and humidity on net photosynthetic rate of Camellia sinensis var.pubilimba in different canopy density were analyzed.The results showed that the net photosynthetic rate of tea without any shade in June displayed a small amplitude photosynthetic Midday-depressing phenomenon at 13 o’ clock,whilst it didn't appear for the garden with shade condi-tion.The air temperature and soil temperature of garden in the shade cases were lower than those bare tea garden ,and the greater the canopy density was ,the lower the temperature was.Air humidity and soil moisture of garden in the shade cases were higher than the pure tea garden , and the bigger the canopy density was , the higher the humidity was.It was most advantage to Camellia sinensis growth and leaves quality improvement under the forest with canopy density 0.3