Management after colonization

1. Environmental regulation

Generally, the air vent should be closed tightly and not ventilated within a few days after planting. The temperature of the seedlings should be kept at 32 ℃ during the day and above 20 ℃ at night. After slow seedling temperature is appropriately reduced, the temperature during the day is generally 16 ℃ ~ 18 ℃ at night. On a cloudy day, the temperature should be reduced accordingly, and the temperature during the day should be maintained at 16 ° C ~ 17 ° C at night. In the case of little influence on the temperature of the greenhouse, try to expose and cover the cold and warm covering as early as possible, and increase the light as much as possible.

When ventilating, cooling, dehumidifying and ventilating, pay attention to opening the vents, and do not let cold air directly blow to the plants, so as to avoid the plants suddenly being cold and "flashing seedlings", affecting the growth. As the temperature gradually increases, the ventilation volume increases.

2. Fertilizer and water management

In the early stage of early spring cucumber ction, the temperature is low, and each watering will cause the temperature to drop. Generally, no watering will be performed 5-7 days after the watering of the planting water. In order to prevent excessive evaporation of water, it can be cted multiple times to promote early hair rooting. If slow seedlings are slower and watering is needed, the amount of watering must be small. If slow seedlings are good, drought and water shortage should be watered. The root melon does not have to be watered until the thumb is long. After that, as the melon expands, the outside temperature rises, the water demａnd increases, and the frequency of watering should increase.

In the early stage of planting, the front space of the greenhouse is small and susceptible to the external low temperature. Therefore, the front temperature is low, and the plant consumes less water than the back. In the later period, due to sufficient sunlight, the temperature will rise, and the ground temperature will increase. The water demａnd of the plant will be greater than that at the back, so this situation should be treated differently when watering. The amount of watering in the early stage should be appropriately small, and increase in the later stage.

Ction of greenhouse cucumbers with relatively low groundwater levels is smaller than watering times with lower groundwater levels and longer watering intervals. Near the east and west gables of the greenhouse, since the morning and evening are shaded for a period of time, the transpiration water of the cucumber and the evaporation of soil water are small, and the growth of the cucumber is weak, so the watering amount for each time is smaller Except), do not water in overcast days.

When the root melon is harvested, as the amount of melon increases, the outside temperature rises, and watering is conducted from the middle ditch of the water surface. After the main vine has been harvested and the top melon has been harvested, in order to promote the production of Huigua, control watering for a period of time, and then resume normal watering when Huigua begins to develop.

It usually starts with root melon and can be fertilized with watering when fertilizer is needed. Organic fertilizer and quick-acting fertilizer are used alternately. It is best to ferment human or chicken and duck manure with water. If chasing chemical fertilizers, chemical fertilizers can usually be applied once after pouring water once or twice. Fertilizers can be ammonium nitrate, ammonium sulfate, and urea. Generally, 10-15 kg of fertilizer is applied every 0.067h㎡ each time, and the urea contains nitrogen, and the amount can be appropriately small. After the fruit is planted, potassium supplementation is necessary to enhance the resistance of the plant and improve its quality. Generally, potassium sulfate is applied.

3. Plant adjustment

(1) Hanger

When the seedling grows to five or six leaves, it is easy to fall. Use a colorless plastic rope hanger. Be careful not to wind the melons into the rope every time you wind the seedlings.

(2) Pruning and bundling

Bundle must be light, do not hurt melon sticks and leaves, affecting growth. When bundling the vines, the tops of each row of plants should preferably be at the same height, in order to achieve neatness and consistency. The specific approach is:

Weakly growing plants are loosely tied upright, and strong growths are bent tightly. Different bending degrees are used to adjust the differences in plant growth. Each time the vines are tied, the "faucet" is oriented in the same direction, so that the regular display can effectively prevent mutual shading.

When binding the vines, remove tendrils to save nutrients. For varieties with side vines, the side vines under the root melon should be removed, and the top side vines can be left with one or two toppings. When the main vine grows to 25 leaves, topping can be done. In the middle and late stages of cucumber growth, timely removal of the old leaves, yellow leaves, and diseased leaves at the base is conducive to ventilation and lightening and reduce pests and diseases.

(3) Luo Man

The ction time of greenhouse cucumber is relatively long, and the pruning method mainly adopts the hook hanging method. When the plant top reaches the roof film, not only the normal light transmission of the film is affected, but the plants are mutually shielded, which leads to poor ventilation and light transmission in the greenhouse. In the cold winter, the "faucet" of the cucumber is likely to suffer from freezing damage, affecting the yield and Quality, leading to the occurrence and spread of disease. In order to make cucumber plants continue to grow and bear fruit, it is a good and effective method to adopt fall vine technology, that is, to drop the whole plant, so that there is a space for the upper part of the plant to continue to grow fruits.

When the vine is falling, first remove the old leaves and melons from the lower part of the vine, and then remove the hook at the base of the vine. The vine is released from the hanging rope, and it is gently dropped by hａnd and the homeopath is placed in a small circle. On the mulch mulch, after the vines fall to the required height, hang the hooks on the vines close to the ground, and then continue to entangle and clear the upper vines, and try to keep the cucumber "faucet" aligned.

When falling vines, choose a sunny day, and do not do it before 10 am or after watering. Otherwise, the water content of the stem vine tissue is too uneven, lacking toughness, and easy to break or twist. The action of falling vine should be light, don't pull hard. It is necessary to follow the curve of the stem vine to fall down. When coiling the stem vine, bend the stem vine along the curve of the vine, do not bend it hard or reverse, and avoid breaking or twisting the vine.

The stem must fall on the mulch, not on the surface of the soil, and it is not allowed to bury the stem in human soil, so as to avoid the meaning of grafting after the cucumber stem grows indefinite roots in the soil. The degree of fall of melon is generally 0.5-1.0m. The leaves and stems are kept about 15cm from the ridge surface, and each plant maintains 15 to 20 functional leaves. The specific degree is flexible according to the growth of the cucumber. If there are few lower melons and the seedlings are growing vigorously, you can drop more at one time, otherwise you can drop less. Attention should be paid to ensure that the plant height in the shed is relatively consistent, that is, the east-west direction is consistent, and the north-south direction is high in the north and low in the south.

After falling, strengthen the management of fertilizer and water and promote new leaves. The method of topdressing is suitable to be applied under the ditch. After falling, we must strengthen the disease prevention measures. According to the types of cucumbers that are frequently affected, we should choose the corresponding agents to spray the disease. Within a few days after falling, we should properly increase the humidity in the greenhouse to promote wound healing of the stem. The germinated side branches of the lower part of the stem must be removed in time to avoid competing with the main stem for nutrition.

Zhengzhou Delong Chemical CO., Ltd. is the production base of plant growth regulators in China, which established in 2009, specializing in offering plant protection products. If you have any question, contact us any time.