Study of sustainable use of Gonostegia hirta in Taromak tribe, Rukay ethnic group, Taitung, Taiwan.

• Main Authors: HSU, WAN-YU, 許婉瑜
• Other Authors: LIU, CHIUNG-HSI
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/2244zs

碩士 === 國立臺東大學 === 生命科學研究所 === 95 === Gonostegia hirta was the wild vegetable which the Rukay people of Taromak tribe in Taitung eaten and was the main consuming material of dumplings in Austrnesian Nature Center. For the sustainable resource usage of Gonostegia hirta ,we set up test regions of research at three elevations of 600、1000、1400 meters respectively , and carried out harvesting at harvest frequency of every 1,2,4,8,16,20 weeks. Some parts of the test regions gathering of different intensity were carried out and at the same time coupled with cleaning out other kinds of cover plants. The data shows that the net harvest amount of Gonostegia hirta was significant at harvest frequency of every 1,2,4 weeks, which means it was not a way for sustainable usage. However, at harvest frequency of every 8,16,and 20 weeks , the net harvest amount was not significant at low、middle、high elevations . The net harvest amount was significantly more reduced by knife than by hands according to the harvest frequency at every 1, 2, 4 weeks. It was different whether cleaning out the weeds or not. The net harvest amount was not significant at different elevations of 600、1000、1400 meters and at different harvest frequency of every 8,16,or 20 weeks. From the data , we found that the net harvest amount accumulated within 20 weeks will be obtained the maximum harvest amount of Gonostegia hirta at harvest frequency of every 8 weeks, and then every 16 ,20 ,4 ,1 ,2 weeks in order respectively. The net harvest amount was more accumulated by hands than by knife. In addition, the maximum net harvest amount was obtained at elevations of 600 meters; However, at elevations of 600、1000、1400 meters, there was not significant between 3 different elevations of harvesting. Compared the regression formula derived from the growth rate after harvesting at 3 different elevations with the harvest amount, we demonstrated that it was needed at the harvest frequency of every 8 weeks at elevations of 600 meters , every 8 weeks at elevations of 1000 meters, and every 12 weeks at elevations of 1400 meters to achieve sustainable usage of Gonostegia hirta. Besides, in terms of environmental factors ,the results of related tests were significant regardless of elevations、coupling plant coverage and degree of Gonostegia hirta coverage, and the results of related tests between coverage degree of the sky and Gonostegia hirta were not significant; Furthermore, the relationship between the harvest amount of Gonostegia hirta and the coverage degree of it was significant.