Technical Applicability of Afforestation with brine-tolerative trees in the Tidal Section of River in the Southern Kyusyu

九州南部河流潮汐段耐盐碱造林技术适用性

基本信息

批准号：
15580135
负责人：
KITAMURA Hirokazu
金额：
$ 1.02万
依托单位：
Minamikyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

项目摘要

The salt-tolerance of Hibiscus hamabo Sieb.et Zucc. (hamabo) seeds were evaluated by germination experiments and cutting methods for the purpose of regenerating hamabo forests in southern Kyusyu estuaries.Our experiments using cutting methods indicate that Hibiscus hamabo Sieb.et Zucc tolerates daily immersion in salt water prepared by dilution of sea water with a salinity of 13, 50022, 000 it S/cm and establishes roots from May to October. Furthermore, our tests showed germination rates of H. hamabo seeds in seeding beds with salinity of 0-13,500,17,500-20,000 and 22, 000-28, 000 μS/cm to be 91-97,49-66, and 7-29%, respectively. These results would demonstrate that hamabo has superior saltwater-tolerance at the seed stage compared to all other plants except mangroves, and it is one of the optimal plant species for use in afforestation around estuaries. Hamabo is widely distributed in estuaries in southern Kyushu, and could serve as an indispensable element in volunteer reforestation efforts to enhance the flora, fauna and natural ecosystem of the surrounding landscape.Our results of germination tests indicated that 1) hamabo seeds were successfully germinated in only from April to October, suggesting that the germination period of hamabo seeds is confined to the period between April to October, and that there is a period of dormancy extending from November to March, 2)collection time of the seeds, experiment season and salt water concentration were significant predictors of germination rate (P<0.001, P<0.005 and P<0.001, respectively), and 3) the maximum salt concentration at which hamabo seeds were able to germinate was 15,000〜20,000 ppm for germination in August and September. The maximum salt concentration appears to be greater than that tolerated by other halophytes, except for mangroves.

芙蓉hamabo sieb.et Zucc的盐分耐受性。通过发芽实验和切割方法评估（Hamabo）种子，目的是为了再生九州河口的Hamabo森林而进行的。此外，我们的测试表明，盐度为0-13,500,17,500-20,000和22,000-28,000μs/cm的播种床中H. hamabo种子的发芽率分别为91-97,49-66，分别为7-29％。这些结果表明，与红树林以外的所有其他植物相比，Hamabo在种子阶段具有优越的盐水耐受性，并且它是河口周围可负担的最佳植物物种之一。 Hamabo广泛分布在九州南部的河口，可以作为志愿者重新造林的必不可少元素，以增强周围环境的动植物，动植物，动物群和自然生态系统。 Our results of germination tests indicated that 1) hamabo seeds were successfully germinated in only from April to October, suggesting that the germination period of hamabo seeds is confined to the period between April to October, and that there is a period of dormancy extending from November to March, 2) collection time of the seeds, experiment season and salt water concentration were significant predictors of germination rate (P<0.001, P<0.005 and P<0.001, ）和3）Hamabo种子能够发芽的最大盐浓度在八月和9月发芽为15,000至20,000 ppm。除红树林外，最大盐浓度似乎大于其他盐植物所耐受的盐浓度。