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绪言植物利用光能将从大气中吸收的二氧化碳和叶内的水化合成碳水化合物,这一反应叫光化学反应。所以,以往人们研究的中心主要是光。在农业上,也是用光——光合作用曲线来分析作物的物质生产的。但是,试测定一作物的光合量便知道,不单只由光强度所决定,也因湿度、风速等其他环境因素不同而有很大变化。而且自然条件经常变化着,光合量亦当有相应的变动。向来所用的光——光合量曲线所表示的值,是将其他环境条件保持不变,只使光强度变化所求得的光合量。这样所求得的光合曲线当然是静止的,这样的数据,与在自然环境下作物的光合量完全两样。只说提高光强度就能增加光合量,预料这对栽培的指导意义不大。那么,风速、湿度、CO_2浓度,温度、培养液中溶存氧气量等等环境要素是如何影响光合量的
Introduction Plants use light energy to absorb carbon dioxide from the atmosphere and the hydration of the leaves into carbohydrates, a reaction called photochemical reactions. Therefore, in the past, the focus of research was mainly light. In agriculture, it is also the use of light - photosynthesis curve to analyze crop production. However, determining the photosynthetic capacity of a crop will not only depend on the light intensity, but also on other environmental factors such as humidity and wind speed. And the natural conditions often change, photosynthetic capacity should also be a corresponding change. The value of the light-photosynthesis curve that has always been used is the amount of photosynthesis obtained by changing the light intensity only while keeping other environmental conditions constant. The photosynthetic curve thus obtained is, of course, still, and the data is quite different from the photosynthesis of crops in the natural environment. Just to increase the light intensity can increase the amount of photosynthesis, is expected to guide the cultivation of little significance. So, the wind speed, humidity, CO2 concentration, temperature, dissolved oxygen in the culture medium and so on how environmental factors affect the amount of photosynthesis