…Bulbous plants such as crocuses and hyacinths can be grown using only water because the bulbs themselves contain nutrients, and this is called hydroponics. There are two types of hydroponics: one in which the roots are directly immersed in a solution (hydroponics in the narrow sense), and another in which the roots are grown in chemically inactive materials such as sand, gravel, vermiculite, and sawdust (sand culture, gravel culture, etc.). It was confirmed in 1851 that plants planted in sand would grow normally when given a solution (called a nutrient solution) containing the elements necessary for growth, and in 1860 it was successfully cultivated using only a nutrient solution. … *Some explanations of terms that refer to "water culture" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…クロッカスやヒアシンスなど球根植物では,球根自体に養分があるので水だけで栽培でき,この場合は水栽培という。水耕には,根を直接水溶液中に浸漬(しんし)する方式(狭義の水耕water culture)と砂,礫(れき),バーミキュライト,おがくずなどの化学的に不活性な資材に根を張らせる方式(砂耕,礫耕など)がある。生育に必要な元素を含む水溶液(培養液という)を与えると,砂に植えた植物が正常に生育することが確かめられたのは1851年のことで,60年には培養液だけで植物を栽培することに成功した。… ※「water culture」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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