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植物学准备“花的构造”实验的观察材料 1.冬末初春,用高枝剪从山桃树上截取发育好、长有饱满花芽的枝条,促使花蕾开放。其方法有两种:①浓烟熏催法:将枝条扎成一束,放人大型塑料袋中,再取一个小花盆,盆底孔处垫一石片,里面点燃干草后撒上潮湿的树叶,待产生浓烟后,将花盆迅速移人塑料袋内并扎紧袋口。②温水浸泡法:将枝条放人保温桶里,倒入30-33℃的温水浸没、泡6小时。如果有条件放人恒温水浴箱更好。取出用温水浸泡后的桃枝,将其下端再插入5%蔗糖液中,控制室温在20℃左右,一周后可开花。 2.四月中旬采集盛开桃花的短枝,5月中、下旬
Botany Preparation “flower structure” experimental observation of the material 1. Early winter early spring, with high branches and cut from the peach tree development well, grow full of buds of flowers to promote flower buds open. There are two ways: ① thick smoke reminder method: the branches tied into a bundle, put large plastic bags, and then take a small pots, pelvic floor pad at the end of a stone tablets, which lit after the hay dusted damp leaves , To be generated after the smoke, the pots quickly moved to the plastic bag and tie tight pocket. ② warm water soaking method: The branches put in the insulation barrel, poured into warm water immersion 30-33 ℃, soak for 6 hours. If conditions allow warm water bath better. Remove the peach branches soaked in warm water, then insert the lower end of 5% sucrose solution, control room temperature at about 20 ℃, one week after flowering. 2. In mid-April collected peach blossoms in the spur, mid-May, late