The Study of Producing Tomato Seedling from Lateral Shoots Using Ebb-and-flow System

• Main Authors: Way-jone Hsiao, 蕭瑋炯
• Other Authors: Din-sue Fon
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/08875908437764163120

碩士 === 國立臺灣大學 === 農業機械工程學系研究所 === 88 === Presently, most tomato's seedlings are grown from seeds in the field and their growing time lasts 20 to 25 days. The growing period could be shortened if seedlings are grown from lateral shoots. This technique also benefits for adjusting the harvest time of tomatoes and for replanting new ones on the greenhouse's benches. The purpose of this study focuses on the physiological characteristics of tomato plants growing from the stage of lateral shoots using ebb-and-flow irrigation. The growing enviroment was controlled to explore the relation and influence of lengths of lateral shoot, periods of ebb-and-flow irrigation, and curing operations via this system. The lateral shoots were cut directly from the natural plants of tomato and cultivated by this system. As the lateral shoots continue to grow, we have observed their first flowers and fruits in this experiment. Experiments showed that, among 5, 8 and 11 cm in length of lateral shoots, the longer the lateral shoots, the higher the rooting rates observed. Lengths longer than 8 cm have higher rooting rates and reaches its highest at 11 cm in length. In split tests for irrigating periods and curing operations, the rooting rate of shoots by three different periods of irrigation and two different curing operations of shoots were observed. The periods of ebb-and-flow irrigation have significant effects on rooting rates. The shoots processed by curing operation were also extremely significant on rooting rates. All treatments have best results as the period of irrigation was set at H10/L50. In analysis, the influence between nutrient temperature and rooting time of lateral shoots were studied. The lateral shoots in nutrient at 26 were found 1~3 days earlier in rooting time than at 23 . To attend a rooting rate over 85% via this system, it is recommended that a combination of H10/L50 for irrigation period, length of side shoots longer than 8 cm with curing and set temperatures for nutrients between 23 and 26 be used. The survival rate of lateral shoots treated by this system reaches nearly 100% when they are later planted on the benches in the greenhouse. The average of the first flower of seedlings was about 5 to 6 weeks and the average first harvest was about 7 to 8 weeks. There were no symptom of disease observed.