Key points to remember for high-temperature greenhouse sealing in summer, with the latest details

For greenhouse vegetable cultivation of more than five years, the soil contains a great many pathogens. As continuous cropping in greenhouses keeps increasing, soil-borne diseases gradually develop, and the high-temperature season is exactly a good time to prevent and control pests and diseases. As long as growers master the greenhouse sealing method well, they can achieve twice the result with half the effort in pest and disease control. However, there are also some issues to pay attention to in high-temperature greenhouse sealing. Let's take a look below.

1. It is not advisable to apply biological bacterial fertilizer

When plowing in base fertilizer before sealing the greenhouse, be sure not to apply biological bacterial fertilizer together into the vegetable greenhouse. If biological bacterial fertilizer is applied before sealing the greenhouse, the beneficial bacteria in the biological bacterial fertilizer will be killed by the high temperature during the high-temperature greenhouse sealing process, and thus cannot play their original role, causing waste and increasing planting costs.

2. Film replacement

Generally, the film of a greenhouse is replaced once a year. After the spring crop vegetables are pulled out, farmers can level and plow the land, apply farmyard manure, and use the old film for high-temperature sealing. Although this raises the temperature more slowly, the sealing time should be appropriately extended when sealing the greenhouse. However, it does not matter if the sealing time is a little longer, because the old film is also due for replacement, and the new film should be replaced promptly after sealing the greenhouse.

3. Move out the plants

For greenhouses with relatively severe root-knot nematodes, the plants should be moved out of the greenhouse promptly before high-temperature greenhouse sealing, so as to avoid root-knot nematodes harming the plants during sealing, which is detrimental to plant growth and development. In addition, many farmers apply all fertilizers, including biological bacterial fertilizer, together into the greenhouse as base fertilizer, which is obviously wrong. Some vegetable growers even, after applying sufficient base fertilizer containing biological bacterial fertilizer, not only carry out high-temperature greenhouse sealing but also combine it with methyl bromide fumigation. This practice is even less worth advocating.

4. Greenhouse sealing time

When sealing the greenhouse, also pay attention to the sealing time. When new film is used, the temperature rises quickly, but the film is damaged relatively seriously, so the sealing time should be appropriately controlled. Generally, after dry sealing, wet sealing for half a month is enough. For some old greenhouses, the sealing time can be slightly extended, but try not to exceed 20 days.

The above is an introduction to the key points for high-temperature greenhouse sealing in summer. We hope it can help you. If you want to learn more related knowledge, please follow us.