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各种庄稼都离不开阳光,但对光的需要量却各不相同,有的喜欢长日照,有的喜欢短日照,并且对不同颜色的光也有挑选。如叶片吸收最多的是红、黄和蓝、紫光,而对绿色光则几乎全部反射掉。小麦在蓝、紫光照下,不但发育快,而且蛋白质的含量也高;甜菜、甘蔗等糖料作物在红色光照下,含糖量会大大增加;胡萝卜在红、黄色混合光作用下,生长最快;甜瓜在红光下不仅生长快,而且糖分和维生素的含量也高;茄子增加紫色光,果实结得又多又大;辣椒则无所选择,有白色光就可
All kinds of crops are inseparable from the sun, but the demand for light is different, and some like long sunshine, and some like short sunshine, and the light of different colors are also selected. If the leaves absorb the most is red, yellow and blue, purple, while the green light is almost all the reflection off. Under the blue and violet light, wheat not only develops rapidly but also has high protein content. Sugar crops such as sugar beet and sugarcane will greatly increase under the red light. Under the action of red and yellow mixed light, carrot grows most Fast; melon in the red light is not only fast-growing, but also sugar and vitamin content is high; eggplant purple light, the fruit is too large and large knot; pepper is no choice, with white light