二、光照 光照是一切绿色植物进行光合作用的能源。柑桔虽较耐阴,但仍需较好的光照,才能获得优质高产。 (一)光照与光合作用 柑桔的光合作用通常随着光强的增高而加快。一般晴天上午6时至下午6时,每平方米叶面积的净同化量为5.4～8.8克,而阴天、雨天的净同化量为晴天的1/2～1/4。但当光强上升到一定程度后,光合作用不再增高,这时的光照强度称为“光饱和点”。柑桔的光饱和点比较低,有人试验,温州蜜柑 Second, the light is illuminated by all the green plants photosynthesis energy. Although citrus shade more tolerant, but still need better light, in order to obtain high quality and high yield. (A) light and photosynthesis Citrus photosynthesis usually with the light intensity and speed up. Generally, the net assimilation amount per square meter leaf area is between 6 and 6 pm, ranging from 5.4 to 8.8 grams. On the cloudy and rainy days, the net assimilation amount is 1/2 to 1/4 of the sunny day. However, when the light intensity rises to a certain extent, the photosynthesis no longer increases, and the light intensity at this time is called “light saturation point.” Light saturation point of orange is relatively low, some people test, Wenzhou Satsuma