Tian Yue Yue, Zhang Li Xia, Zhang Zheng Qun, Qiao Ming Ming, Fan Yan Gen
College of Horticulture Science and Engineering, Shandong Agricultural University/Tai'an Tea Engineering and Technological Research Center, Tai'an 271018, Shandong, China.
Ying Yong Sheng Tai Xue Bao. 2017 Mar 18;28(3):789-796. doi: 10.13287/j.1001-9332.201703.004.
In order to ensure the suitable shade model for 'Huangjinya' tea plant in Shandong Province, black or blue shading net at 55%, 70% or 85% shading rates was selected to recover tea garden in summer and autumn, then micro-climate of tea garden, leaf color, chlorophyll fluorescence parameters, growth status and biochemical composition of tea shoots were investigated.The results showed that compared with the control, light intensity and air temperature in tea garden, leaf temperature of tea plants in different shading treatments significantly decreased, while air humidity in tea garden increased. The contents of chlorophyll in the tea leaves were obviously increased with increasing the shading rate, which resulted in the leaf color becoming green. The yellowing characteristics and biochemical quality of 'Huangjinya' tea plants could be well kept in 55% shading treatments. In 70% shading treatments, 'Huangjinya' tea plants had better growth situation and higher yield with no photo-inhibition. Compared with the blue shading treatments, black shading treatments could obviously promote the growth of 'Huangjinya' tea plants, keep yellowing characteristics, and improve the quality. Therefore, the 70% black shading treatment (daily PAR values of 1.2-3.5 ten thousand lx) was appropriate for promoting the growth of 'Huangjinya' tea plants at the seedling stage. For mature tea plants, the 55% black shading treatment (daily PAR values of 1.8-5.5 ten thousand lx) could be used to keep the yellowing characteristics and to improve biochemical quality effectively, so as to give full play to its variety characteristics, to achieve goal of high quality and high yield.
为确保山东省‘黄金芽’茶树适宜的遮荫模式，选用遮光率为55%、70%或85%的黑色或蓝色遮阳网在夏秋季节对茶园进行遮荫，进而对茶园小气候、叶片颜色、叶绿素荧光参数、茶树生长状况及茶梢生化成分进行了研究。结果表明，与对照相比，不同遮荫处理茶园的光照强度和气温、茶树叶片温度显著降低，而茶园空气湿度增加。茶叶中叶绿素含量随遮荫率增加而明显升高，致使叶片颜色变绿。‘黄金芽’茶树的黄化特性和生化品质在55%遮荫处理下能得到较好保持。在70%遮荫处理下，‘黄金芽’茶树生长状况较好、产量较高且无光抑制现象。与蓝色遮荫处理相比，黑色遮荫处理能明显促进‘黄金芽’茶树生长，保持黄化特性，提高品质。因此，70%黑色遮荫处理（日光合有效辐射值为1.2 - 3.5万勒克斯）适宜促进‘黄金芽’茶树幼苗期生长。对于成年茶树，55%黑色遮荫处理（日光合有效辐射值为1.8 - 5.5万勒克斯）可用于有效保持黄化特性和改善生化品质，从而充分发挥其品种特性，实现优质高产目标。
