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地球上的能量,绝大部分来源于太阳幅射能,人们从事农业生产,通过绿色植物的叶片,截获太阳能,转化为化学能,贮藏于有机物中,供人们生活的消耗。绿色植物利用太阳能制造有机物的过程叫光合作用。可用下列化学式来描述: CO_2+H_2O:光合作用(CH_2O)+O_2 上式说明:光合作用是绿色植物吸收二氧化碳和水,制造碳水化合物,释放氧气的过程。根据计算:通过光合作用,每年转化成有机物质的碳达 3 X 10~(11)吨,同时,把1.7~4×10~(17)大卡的太阳能转化成化学能,为人类和动、植物的生命活动提供了物质和能量的基础。人类和动、植物的呼吸和燃烧过程,日以继夜地消耗氧气,释放二氧化碳,如果没有一个相反的过程,来补充氧气的消耗,
Most of the earth’s energy comes from the solar radiation energy. People engage in agricultural production. Through the leaves of green plants, they intercept the sun’s energy, convert it into chemical energy, and store it in organic matter for the consumption of people’s lives. The process by which green plants use organic solar energy to produce organic matter is called photosynthesis. The following formula can be used to describe: CO_2 + H_2O: Photosynthesis (CH_2O) + O_2 The above equation: photosynthesis is the process by which green plants absorb carbon dioxide and water to produce carbohydrates and release oxygen. According to the calculation: Through the photosynthesis, the annual conversion of organic matter to 3 X 10 ~ (11) tons of carbon, at the same time, the 1.7 ~ 4 × 10 ~ (17) kcal of solar energy into chemical energy for human and animal, The life activities of plants provide the material and energy basis. Human and animal, plant respiration and combustion process, oxygen consumption around the clock, the release of carbon dioxide, if there is no reverse process to supplement the oxygen consumption,