1. Observe the growth of narcissus under different conditions.

2. Effects of water, temperature and light on narcissus.

3. It can beautify the environment and cultivate sentiment.

Observation object

narcissus

Materials and appliances

Pot, water, pebbles, two narcissus bulb.

Operator

(mainly based on records)

Notes on narcissus cultivation observation

In order to understand the effects of water, temperature and light on plants, narcissus, two cold-resistant, easy to survive, easy to bloom, easy to operate and short-lived herbs, was taken as the experimental object.

65438+February 15 cloudy on Friday

Narcissus bulbs, shaped like garlic, are about 6 cm high and 10 cm in diameter, with fibrous roots of different lengths at the bottom. I carefully fixed the fibrous roots of two narcissus bulbs between two pots with stones, and poured water on them, so that the water just completely submerged the fibrous roots. One basin is on the outdoor balcony, and the other basin is on the table in the living room.

65438+February 24th sunny Sunday.

I changed the water for daffodils and found that the leaf buds of daffodils were very small. The bud tip stands upright. Buds, glowing light green. Leaf buds are also covered with a transparent film. In contrast, daffodils placed outdoors have shorter buds.

65438+1It will be fine on Wednesday, October 2nd.

The small leaf buds of indoor narcissus have grown taller and thicker. The leaf bud, which was tightly wrapped a few days ago, has stretched out two leaves, one high and the other low. The leaves are slightly everted. The small leaf buds are tightly wrapped around the stem in the middle of the leaves. The leaves in outdoor narcissus bulbs are about 1 ~ 2cm shorter than those in indoor bulbs, with hard leaves, thick skin and dark color.

65438+1It was cloudy on Monday, October 8th.

The leaves of indoor narcissus have grown into the shape of five leaves and one heart, the main stem is as high as 30 cm, and a small flower stem has been pulled out. Outdoor daffodils only have four leaves and one heart, and the main stem is only 26 cm high, but the flower stem is thicker than the former.

65438+1October 1 1 It is cloudy on Thursday.

The main stem of the indoor daffodil has grown to 35 cm, and a bud has grown at the top. The main stem of outdoor daffodils is only 30 cm high, but the color of stems and leaves is slightly darker than the former.

1Friday, June 9, sunny

There are three flower bones on the main stem of indoor narcissus, which are covered with a transparent greenish film and lined with snow-white petals. There are five flower bones outside, which are bigger than those inside.

65438+1021cloudy on Sunday

The indoor daffodils bloomed two days ago, and the outdoor flowers just bloomed today. The daffodils in the room broke the outer membrane, and the petals outside extended in all directions, but the petals inside were still tightly wrapped by stamens. In the evening, the whole flower is in full bloom. Its petals are divided into two layers, the outer layer is white, there are six layers of petals, and the inner layer is pale yellow. Stamens are golden yellow, only the size of sesame. The daffodils outside are very big, and each petal is not only long but also wide and thick. It is slightly larger than the indoor flowers and has a strong fragrance.

65438+1cloudy on Sunday, October 28th.

When the outdoor daffodils are still blooming brightly, the color of the indoor daffodils gradually turns yellow, and the edges are slightly rolled up, which is about to wither.

It will be sunny on Tuesday February 6th.

Indoor daffodils have long withered, while outdoor daffodils with low temperature are gradually shrinking today. Indoor daffodils open 13 days, outdoor daffodils open 17 days.

Through the observation and experiment of daffodils, I know that daffodils placed outdoors ensure the content of water and inorganic salts needed for their growth because they change water regularly. In addition, when placed outdoors, there is enough light for photosynthesis during the day and the temperature is low at night, which is suitable for daffodils to grow. Therefore, this daffodil has thick stems and leaves, large and fragrant flowers and long flowering period. However, the daffodils placed indoors are in an environment with little light and small temperature difference because of irregular water change, so the stems and leaves are slender, the leaves are yellow, the flowers are small, tasteless and the flowering period is short. It can be seen that water, temperature and light play a decisive role in the growth of narcissus.