Planting Experiment of Jatropha curcas L. in Taiwan

• Main Authors: Sheng-Kuo Hsieh, 謝勝國
• Other Authors: Kuen-Yih Ho
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/96566387133960433389

碩士 === 國立嘉義大學 === 森林暨自然資源學系研究所 === 100 === This research in the southern area of Taiwan focuses on the planting test of one of the energy crops, "Jatropha curcus," choosing coast, plain, and low elevated hills as test fields, to investigate the growing status of the seedling and cutting seedling of Jatropha curcus according to the weather and soil factors of each test field, hoping to find the proper environment for Jatropha curcus plantation; the experiment also further proceeds left stubble and fruit thinning on mature Jatropha curcus, probing into the effects on the fruit productivity of Jatropha curcus, to benefit the development of future botanical energy. The result shows that, in the aspect of the kinds of seedling, under worse environment at Dongshih , the adaptability of seedling is better than that of cutting seedling; but in the aspect of top growth at Sihhu the growing speed of cutting seedling is faster than that of seedling, and can be economical beneficial in a shorter time. As for the fruit productivity of left stubble and fruit thinning it is the left stubble that the height of cutting is 80cm high from the bole that can effectively increase fruit productivity, and it can concentrate the bearing period. Besides, for thinning 2/3 fruits in each infloresc- ence, the fruit productivity also follows a trend of significant increase, and it also have the best effect of concentrating bearing period. Since it is the Sihhu and Singye where the growing statuses are the best, it is conce- ivable that, in Taiwan, the best growing environment for Jatropha curcus is from in-land low elevated hills to plain fields where are away from the sea, and the pH degree of the soil is 6.6-7.8, and the annual rainfall is 1300 mm-2000 mm, but floods should be prevented.