Today's summer solstice, how to manage greenhouse vegetables?

In summer, the temperature in the vegetable greenhouse is also very high. The high temperature environment has a certain hindering effect on the growth of greenhouse vegetables, such as affecting the progress of photosynthesis and inducing various bacterial diseases. In the high temperature summer, greenhouse vegetables should be mainly cooled, and various measures should be taken to prevent vegetables from being damaged by high temperature. It is necessary to manage it scientifically and avoid human factors causing "injury" of shed vegetables. So how to manage greenhouse vegetables in summer?

1. Do a good job of "three needs" to make greenhouse vegetables grow healthily

1. Need to do a good job of ventilation

In order to prevent the vegetables in the shed from being affected by high temperature, it is necessary to open all the upper and lower air vents of the shed, so that the cold air outside the shed can enter the shed and form convection with the hot air in the shed to accelerate the discharge of hot air, thereby reducing the temperature inside the shed. temperature.

2. Shading nets need to be placed

In the morning, when the temperature in the shed is close to the maximum temperature suitable for vegetable growth, put down the shade net. In the afternoon, when the temperature in the shed is lower than the maximum temperature suitable for vegetable growth, roll up the shade net, but be careful not to put the shade net down. Block the vent. When purchasing a shading net, choose a shading rate of about 60%. This kind of shading net can not only shade and cool down, but also allow part of the light to shine inside the greenhouse, which is beneficial to the improvement of photosynthesis of vegetable leaves.

3. Need to spray in time

At noon in summer, the temperature in the shed is high, and the evaporation of leaf water is large, and the water absorbed by the root system cannot meet the needs of vegetable water evaporation, which makes the vegetable leaves roll up. The spray nozzle can be installed in the shed to reduce the shed temperature, which can also increase the air humidity in the shed, prevent the drying of vegetable style and stigma, promote pollination, and prevent vegetables from falling flowers and fruits.

2. Matters needing attention in the process of planting vegetables in greenhouses:

1. Avoid excessive water control

It is recommended to use small water and frequent watering to ensure the normal growth of vegetables. The time and frequency of watering can be determined according to the dry and wet conditions of the soil in the shed and the weather conditions.

2. Avoid excessive leaf thinning

Timely fruit, reasonable pruning. Combined with the growth of the plants, the fruit should be kept early for the prosperous plants, and the fruit picking should be delayed appropriately to compete for the nutrients of the plants as much as possible and reduce the flow of nutrients to the plants. For example, when picking zucchini, it is about 500 grams, which can be increased to 600 grams before picking. On the contrary, when the plants are weak, they should be picked earlier. Prosperous plants should be properly pruned late to disperse nutrients, and reasonable pruning should be carried out after the number of remaining fruits increases or the plants recover.