植物学叶的呼吸作用(演示实验) 取一玻璃罐头瓶,瓶内铺2厘米厚的蛭石粉或沙土,再均匀地种上几十粒小麦,放在20℃左右,阳光充足的地方,并适时浇水。二周后,用一个钟罩将玻璃瓶及麦苗一起扣住。钟罩的口配备一个打有两个孔的橡胶塞。剪取15厘米长的乳胶管,两端分别连接一截玻璃管。一端玻璃管从橡胶塞的一个孔通入钟罩内,另 Botany leaf respiration (demo) Take a canned glass bottle, bottle shop 2 cm thick vermiculite powder or sand, and then evenly planted dozens of wheat, on about 20 ℃, sunny and Timely watering. Two weeks later, use a bell jar to hold the glass bottle together with the wheat germ. The mouth of the bell is equipped with a rubber plug with two holes. Cut a 15 cm long latex tube with a glass tube attached at each end. One end of the glass tube from the rubber plug into the hole in a hole, the other