皖南茶园夏季太阳辐射能状况

纯茶园晴天和昙天太阳辐射能状况观测表明,茶树冠层具有对太阳辐射能较高的截留系数、较低的透过系数和反射系数的特性。夏季茶树每天有6—10小时暴露在高过其光饱和点数倍的强光下,这可能是导致丘陵茶区茶叶品质欠佳的另一原因。文中提出应加强减少茶树对太阳辐射能的截留技术措施的研究。

Solor Radiation on Tea Garden in Southern Anhui Province

Observation on solar radiation on pure tea garden was conducted inXinning County,Anhui Province.Results showed that in the pure teagarden,the crowm of tea plan t could absorb more than 80% of the solarradiant flux reaching the crowm.The density of the absorptive radiant fluxcould reach 2—3 times as high as the point of the light saturation of tea plant,and it could last 6—10 hours in a summer day.The over-density was unbe-nefitial to the metabolism and the amino acid formation of tea plant,resulting in the poor quality of tea in subtropical area.Measurements todecrease the solar radiant flux reaching the crowm should be taken.