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.

为了重建九州河口南部的滨海森林，通过发芽实验和砍伐方法对木槿种子的耐盐性进行了评估。我们使用砍伐方法进行的实验表明，木槿种子具有耐盐性。每天浸泡在由海水稀释而成的盐水中，盐度为 13, 50022, 000 it此外，我们的测试显示，在盐度为 0-13,500、17,500-20,000 和 22、000-28、000 μS/cm 的苗床中，Hamabo 种子的发芽率为 91。分别为 -97,49-66 和 7-29% 这些结果表明 Hamabo 具有优越性。与除红树林外的所有其他植物相比，其种子阶段的耐盐水性较高，是河口造林的最佳植物品种之一，广泛分布于九州南部的河口，可以作为志愿植物中不可或缺的元素。重新造林工作，以改善周围景观的动植物和自然生态系统。我们的发芽测试结果表明，1）hamabo 种子仅在四月至四月期间成功发芽10月，表明哈马博种子的发芽期仅限于4月至10月，11月至次年3月有一段休眠期，2）种子的采集时间、试验季节和盐水浓度显着发芽率的预测因子（分别为 P<0.001、P<0.005 和 P<0.001），3) 哈马博种子能够发芽的最大盐浓度为八月和九月发芽时的最大盐浓度似乎高于除红树林外的其他盐生植物的耐受浓度。