How to prevent high temperature vegetables in the open air

In the high temperature period in summer, vegetables cultivated in the open air are also seriously damaged by high temperature. The vegetables in the greenhouse can be covered with shade nets to achieve the purpose of shading and cooling. Therefore, in addition to selecting heat-resistant varieties, the open-plan vegetables can also take the following control measures:

 

A small area of ​​land can be used to build a pergola to cool down the shade, set up a shade shed on the vegetable field, top up the branches, or grass rafters.

 

Set up a temporary small arch shed, covered with shade nets: like cabbage, celery, broccoli and cabbage in summer and autumn seedlings, it is worth the hot weather, at this time must be shaded. Therefore, it is recommended that the vegetable farmers can build a temporary small arch shed, which is covered with a sunshade net, which can not only reduce the temperature, but also protect the glare.

 

The ground is covered with grass hazelnuts or hay: no matter whether it is traditional seedling method or seedling seedling cultivation, it can be covered with thin grass hazelnuts, hay and so on to cover the seedbed after sowing. It can cool down and moisturize, and greatly improve the emergence rate. When 60% of the seedlings are unearthed, the cover can be removed, and the seedlings should be gradually lengthened to prevent the seedlings from being exposed to the sun.

 

Increasing the number of leaves of the vegetable plant itself for shading: When the tomato is topped in the summer season, two layers of leaves should be kept on top of the top layer. The upper side branch of the pepper vegetables, leaving 2 leaves and then heading, is also for the purpose of shading and cooling. There is also an open-air summer watermelon in the midsummer season. The vegetable farmers generally use the leafy melon to cover the body, which can also play the role of shading and cooling.

 

Irrigation and cooling: After the summer vegetable field is filled, it is best to cover the wheat straw or wheat bran on the surface, or cover a thin layer of dry soil to reduce water evaporation and reduce the ground temperature. In addition, the watering time should be carried out in the morning or evening. In the rainy season, we must pay attention to the timely elimination of water in the field. After the rain, we should use the well water to water the vegetable fields in time to reduce the ground temperature. Spraying irrigation can also reduce the ground temperature and increase the air humidity.

 

Intercropping: At present, some vegetable farmers make corn in the sweet pepper field, which is to use the shading effect of corn to reduce the temperature of the sweet pepper field. This is also the principle of interplanting strawberries in fruit trees.

Source: Inner Mongolia Agriculture and Animal Husbandry Information Network