任何生物一时一刻也不能离开水,农作物更是这样。我们试把较新鲜的植物材料盖上冷玻璃加热烘烤.或是放在太阳下晒,一会儿我们便会在玻璃上发现有“气溜水”的水珠,材料也因而大大减轻重量。这现象表明:植物体内合有水,水是植物有机体的重要组成部分,是生命活动所必需的条件。一般的植物体都含有60%—80%的水,蔬菜和块茎块根作物合水达90%—95%,而某些水生植物含水竟达98%以上!植物要通过光合作用来制造有机物,从而用来建造自己的身体,井由此获得自身生命活动所需的能 Any creature can not leave the water for a moment, even more so on crops. We try to put fresh plant material on the cold glass heating roast, or placed in the sun, and for a while we will be found in the glass of “slides water” drops, the material thus greatly reducing the weight. This phenomenon shows that: Plant water, water is an important part of the plant organisms, is the necessary conditions for life activities. Ordinary plants contain 60% -80% of water, vegetables and tuberous root crops together water up to 90% -95%, while some aquatic plants contain water up to 98% or more! Plants to produce organic matter through photosynthesis, which Used to build their own body, and thus get the energy needed for their own life activities