"Greenhouse Vegetables" Farmland PPT Courseware 2

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"Greenhouse Vegetables" Farmland PPT Courseware 2

Characteristics of plastic greenhouses

Plastic greenhouses can be used for thermal insulation in spring and autumn to bring vegetables to market earlier or delay their removal from the market. In spring, it can be earlier by 30 to 50 days, and in autumn, it can be delayed by 20 to 25 days. In summer, it can avoid direct sunlight, cool down, increase humidity, reduce evaporation, and prevent the impact of heavy rain.

In winter, some vegetable crops that do not have strict temperature requirements (such as garlic seedlings) can be grown in a solar greenhouse. In this way, production can be carried out better and unnecessary losses can be avoided.

greenhouse vegetables

Greenhouses only cultivate early-maturing solanaceous fruits in spring, and they are only used for 4-5 months a year, so the utilization rate and efficiency are not high. If greenhouses are also used for cultivation, seedling raising and seed saving in autumn, winter and summer, production efficiency can be improved.

1. Seedling cultivation - cultivation type; its characteristics are winter seedling cultivation → early spring cultivation → summer seedling cultivation → autumn and winter cultivation. Winter seedling cultivation usually takes place from November to mid-to-late March of the following year to cultivate solanaceous, melon and bean seedlings. Plant in mid-to-late March for early spring cultivation. Cultivate seedlings such as cabbage and tomatoes from June to August in summer. Cultivation of autumn tomatoes, cucumbers, leafy vegetables, celery, onions, garlic, etc. in autumn and winter.

2. Cultivation type: mainly cultivate vegetables, combined with seedling cultivation. There are two main forms: one is the early-maturing cultivation of eggplants, tomatoes, cucumbers, peppers, etc. in spring, the cultivation of fast-growing vegetables in summer, the cultivation of cucumbers, tomatoes, and cabbage in autumn, and the cultivation of celery, spinach, lettuce, onions, and garlic vegetables in winter.

The average yield of eggplant per mu is 3,500 kilograms, 4.0 yuan/kg

The average tomato yield per mu is 4,000~6,000 kilograms, priced at 2.9 yuan/kg.

The general yield of cucumber per mu is 4000-5000kg, 2.2 yuan/kg

The yield of garlic seedlings per mu is 4000kg, 1.5 yuan/kg

The yield of zucchini per mu is 5000kg, 1.5 yuan/kg

Exploration activity 1

What off-season vegetables have you seen in winter? Why can off-season vegetables be grown in greenhouses?

Exploration activity 2

Why can off-season vegetables be grown in greenhouses?

Exploration activity 3

Compared with vegetables grown in natural conditions, what are the advantages and disadvantages of greenhouse vegetables?

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For more information about the "Farmland Greenhouse Vegetables" PPT courseware, please click the Farmland PPT Greenhouse Vegetables ppt tag.

"Greenhouse Vegetables" Farmland PPT Courseware 3:

"Greenhouse Vegetables" Farmland PPT Courseware 3 Greenhouse planting is mostly in winter. Guess: Why can off-season vegetables grow in greenhouses? Is it related to temperature? Something to do with humidity? Something to do with the sun? Something to do with the creatures in the greenhouse? ... ... ... Inspecting the growth in the greenhouse..

"Greenhouse Vegetables" farmland PPT courseware:

"Greenhouse Vegetables" Farmland PPT Courseware Write the names of common greenhouse vegetables in winter. In what season do these vegetables grow normally in their natural state? Tomatoes, cabbage, lettuce, spinach, spring cucumbers, eggplants, peppers, leeks, macaroni, luffa, beans...

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Update Time: 2024-10-01

This template belongs to science courseware E-education edition fifth grade science volume 1 industry PPT template

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