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蚯蚓的采集和储备当学习“蚯蚓”一课的时候,就需要对蚯蚓进行观察和实验。我们采集蚯蚓,应該在肥沃的菜园土壤里、粪堆下挖掘,將采集的蚯蚓放在結实的木箱子里,最好把木箱子放在房间里,溫度保持,4—8℃,但箱底須要撒一层粗砂,厚度达5—8厘米,在粗砂上面撒上一层肥沃而被篩过的上,在土上放一层枯萎的叶子,然后再放上土,这样一层一层的直到填满箱子为止,最后在上面再撒一层砂子,在填每一层的时候,就需要紧密一些,最后把蚯蚓直接放在砂子上面,它们自己就能钻入箱子里去,但剩在表面的蚯蚓就把它拿掉,在砂土上面时常撒水,保持一定的湿度,这
Earthworms collection and reserve When studying “Earthworm” a lesson, we need to observe and experiment on earthworms. We collect earthworms and should dig them in the fertile garden soil under the dung pile. Place the collected earthworms in a strong wooden box. It is best to put the wooden box in the room at a temperature of 4-8 ° C The bottom of the box need to sprinkle a layer of coarse sand, 5-8 cm thick, sprinkled with a layer of fertile over the coarse sand was screened on the soil put a withered leaf, and then put on the soil, such a layer Until a layer of boxes filled up until the last sand and then sprinkle a layer of time, when filling each layer, you need closer, and finally the earthworms on the sand directly above, they will be able to drill into the box to go, However, the earthworms left on the surface took it away, often in the sand above the water, to maintain a certain degree of humidity, which