摘要
评价4个茶树品种的氟吸收富集能力差异,为有效降低茶叶中氟含量和茶叶生产中推广低氟品种提供参考依据。以前期初选出的4个不同氟含量茶树品种的一年生无性系茶苗为材料,采用溶液培养的方法,研究各品种的短期吸收动力学参数差异、氟吸收累积动态及累积能力差异。结果表明,在低氟浓度生长环境下,茶树对氟的吸收符合Michaelis-Menten动力学方程Vi=Vmax.Ci/(Km+Ci)描述,表现出主动吸收过程,茶树各部位对氟的吸收累积能力表现为成熟叶>>根>茎;随着氟浓度的增加,茶树对氟的吸收逐渐表现出了明显的被动吸收现象。茶树各部位对氟的吸收累积能力表现为成熟叶>>茎>根;中茶102品种对氟的吸收累积能力及对氟的耐受性与中茶108相比有较大的差异,中茶108对氟具有比较稳定的低吸收累积特性,而中茶102则对氟表现出了较强的吸收累积特性,龙井43与乌牛早则介于两者之间。中茶108具有稳定的低氟吸收累积特性,可以作为低氟品种推广。
The characteristics of fluorine absorption and accumulation of four different tea tree varieties were evaluated. One year old clone seedlings of the tea plant varieties were used to study the differences of fluorine absorption kinetics parameters and the fluorine cumulate ability under the aquieultural cultivation. In the low fluorine growth condition, the absorption of fluorine by the tea plants is in the kinetic equation of Michaelis- Menten, which indicates that the course of fluorine absorption in tea plant roots is an active course, and the cumulative ability of fluorine in tea plants is in the order： mature leaves 〉 〉 roots 〉 stems. With the increase of fluorine content in the solution, the passive absorption course is showed gradually, and the cumulative ability of fluorine in tea plants is in the order： mature leaves 〉 〉 stems 〉 roots. The variety, ZC 102, has different fluorine cumulate ability and resistance compared with the variety, ZC 108. ZC 108 has a stable low fluorine cumulate ability and low fluorine survival ability, while ZC 102 has a high fluorine cumulate ability and high fluorine survival ability. The variety, LJ 43 has a middle fluorine cumulate ability and middle fluorine survival ability. These results indicate ZC 108 can be extended as a low content fluorine variety in brick tea production area.
出处
《植物营养与肥料学报》
CAS
CSCD
北大核心
2013年第2期396-403,共8页
Journal of Plant Nutrition and Fertilizers
基金
现代农业(茶叶)产业技术体系(CARS-23)资助
关键词
茶树品种
氟
吸收累积
tea plant variety
fluorine
absorption and accumulation
