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某些种子的萌发需要特殊的处理,比如高温会使某些坚硬的豆科植物种子萌发(Toda 1951,Harada 1953,Nakayama 1960)。在日本的北部地区森林火灾后,几种胡枝子属植物(Lespdeza Spp)在火烧迹地上大量萌发,形成茂密的灌丛(YoshiiandYoshioka1949,Iwata 1964)。可以认为这些植物的大量发生是由于高温而引起的(Fukuhara 1956,Iwata1966)。 1983年4月在Miyagi地区的Nanakit山土壤表层温度却已高达89℃。因而,这次实验选择90℃作为极限温度,分别在50℃、70℃和90℃的温度下测定种子萌发的百分率。将每个种的100粒种子分了3组装入布袋,然后分别浸入50℃、70℃及90℃的热水中,持续30秒钟。把通过热处理和未加热处理的种子同时放在加有湿滤纸的瓷盘中,在25±5℃的温度下做发芽实验。为了进一步测定胡枝子、野葛及盐肤木的发芽情况,将采集的50粒未经实验贮藏的
Germination of some seeds requires special treatment, such as high temperature, which can germinate some of the hardy legume seeds (Toda 1951, Harada 1953, Nakayama 1960). After forest fires in the northern part of Japan, several Lespdeza Spps germinated extensively on the burned-out land to form dense shrubs (Yoshiiand Yoshioka 1949, Iwata 1964). It is believed that the high incidence of these plants is caused by high temperatures (Fukuhara 1956, Iwata 1966). The soil surface temperature of Nanakit Hill in Miyagi district in April 1983 was as high as 89 ° C. Therefore, this experiment chose 90 ℃ as the limit temperature, respectively, at 50 ℃, 70 ℃ and 90 ℃ temperature determination of the percentage of seed germination. The seeds of 100 seeds of each species were divided into three groups into bags and immersed in hot water at 50 ° C, 70 ° C and 90 ° C for 30 seconds respectively. The heat-treated and non-heat-treated seeds were simultaneously placed in a porcelain plate on which wet filter paper was added to perform sprouting tests at a temperature of 25 ± 5 ° C. In order to further determine the germination of Lespedeza, wild Pueraria lobata and Rhus typhina, 50 samples collected without experimental storage