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首页> 外文期刊>American journal of applied sciences >Germination Ecology of Rhanterium epapposum Oliv.
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Germination Ecology of Rhanterium epapposum Oliv.

机译：剑兰（Rhanterium epapposum Oliv）的发芽生态。

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摘要

Problem statement: Rhanterium epapposum, locally called Arfaj is the national flower of Kuwait. The current situation of Rhanterium epapposum is quite critical in most areas of Kuwait. In fact it has completely disappeared from most parts of the country due to a combination of overgrazing, collecting for firewood and off road driving. Approach: Rhanterium epapposum is an excellent species for rangeland restoration and information on its germination ecology is meager. The considerable variations in germination between years lead us to study the variation in the size, mass and number of filled achenes in the capitulum. The variation in capitulum size, mass, number of achenes per capitulum and also the effect of dry heat (1-5 months), Moist chilling (1-5 months) and hydration dehydration cycles (1-5 cycles) on germination of the 6 different year collected Rhanterium epapposum (2002-2007) seeds were studied under laboratory condition. Results: The seed size, weight, the number of achenes per capitulum of Rhanterium epapposum varied considerably from one year to another. Climatic condition significantly decreased seed quality and germination when the precipitation is lower. Heat and moist stratification substantially improved the germination of 2003, 2004 and 2005 seeds. However hydration and dehydration treatment had very little effect on germination. Conclusion: It is concluded that results of germination tests differed depending on the presence of filled achenes in the capitulum. There was a strong correlation between the presence of filled achenes in capitulum and the precipitation during the growing season. This suggested that under natural condition precipitation plays key role in the formation of achenes in capitulum of the Rhanterium epapposum seeds.
机译：问题陈述：剑兰（Rhanterium epapposum），当地称为Arfaj，是科威特的国花。在科威特的大多数地区，剑兰的当前状况非常关键。实际上，由于过度放牧，收集柴火和越野驾驶，它已在该国大部分地区完全消失。方法：剑兰（Rhanterium epapposum）是牧场恢复的极佳物种，有关其萌发生态的信息很少。几年之间发芽的巨大变化使我们研究了头花中填充的瘦果的大小，质量和数量的变化。头皮大小，质量，每个头皮瘦果数量的变化以及干热（1-5个月），湿冷（1-5个月）和水合脱水周期（1-5个周期）对6种种子萌发的影响在实验室条件下研究了不同年份收集的剑兰（Rhanterium epapposum）（2002-2007）种子。结果：一年生红景天的种子大小，重量，人均瘦果数量存在很大差异。降水量较低时，气候条件会大大降低种子质量和发芽率。加热和潮湿分层显着改善了2003年，2004年和2005年种子的发芽率。但是，水合和脱水处理对发芽的影响很小。结论：结论是发芽试验的结果因头盖骨中填充瘦果的存在而异。头孢丛中填充瘦果的存在与生长季节的降水之间存在很强的相关性。这表明，在自然条件下，沉淀在Rhanterium epapposum种子的头皮中的瘦果形成中起关键作用。

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