Studies of the Drought Stress on the Growth and Leaf Structure of Tea Plant
|Authors:||陳國任||Keywords:||1997特用作物試驗成果研討會專刊;Proceedings of A Symposium on the Experimental Results of Special Crops 1997||Issue Date:||Aug-1997||Publisher:||台中：農業試驗所||Start page/Pages:||263-264||Source:||1997特用作物試驗成果研討會專刊:||Abstract:||
Four-year old tea plants grew in 1/20 m2 Wagner Pots. One set of Pots was irrigated 200 ml of water /pot every day to maintain soil moisture content at the field capacity condition . Another set was irrigated 20 ml of water /pot every day to limit the water supply gradually. Results obtained are summarized as follows:
Tea plants generally grew to have five leaves and one bud per shoot and the percentage of banj hi shoots was low at the field capacity condition. The growth of water stressed tea plants was slow with only three to four leaves and one bud per shoot and the percentage of banj hi shoots was high. Water stress also caused tea leaves yellow green,large of leaf interpose and shorter internode. The growth models of tea shoots were analyzed according to the data of shoot length during the treatment period of 30 days and tested by Chi-square .The shoot growth well fitted the quadratic exponential growth equation for both irrigation and limited irrigation treatment in the spring . Quadratic regression equation was suitable for both irrigation and limited irrigation treatments.
Cell size of leaf in cross section:The length of 1st layer palisade cells 52.6(m under water stress treatment in the spring ,the longest among all treatments . The next was 46.3(m under water stress in the winter. Other treatments were between 40.5(21) (m , and were not significantly different.The average length of 3rd layer was between 23.1(l4Xm in which the shortest (23.1(m) was found under water treatment in the summer. The size of spongy cells was 23.4 (m in length and 19.1(m in width under irrigtion in the spring ,the largest among all treatment in the summer which was 20.2 (m in length and 16.5(m in width.
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