What is the role of shade nets in greenhouse seedlings? How to choose?

What is the role of shade nets in greenhouse seedlings? How to choose?

The application of shade net in vegetable cultivation has a good effect on increasing yield. After covering in summer, it plays a role in blocking light, rain, moisturizing and cooling. After covering in winter and spring, it also has a certain effect of heat preservation and humidification.

In the summer, the use of shade nets to cultivate vegetables in the south has become a major technical measure for disaster prevention and protection. At present, the application in the north is limited to summer vegetable seedlings. In summer (June and August), the main function of covering the shade net is to prevent the exposure of the scorching sun, the impact of heavy rain, the harm of high temperature, the spread of pests and diseases, and especially to prevent the migration of pests and diseases.

Shade nets are used for summer vegetable production, which can generally increase the yield by more than 30%; Used for vegetable seedlings, it can increase the survival rate by 20-70%. There are five main types of coverage.

1. Floating surface covering.

Shade nets are placed directly on the ground or on plants, and are generally used at the time of sowing, after planting, and in the late growth of autumn and winter crops.

Second, the small arch cover.

The shade net is covered on the arch bracket of the film small arch canopy, which is suitable for shading, cooling, ventilation in summer and autumn or frost protection at night in early spring, and can also be used for rain protection in the rainy season or night insulation in winter and spring.

3. Flat shed covering.

Set up a flat or inclined bracket with a height of meters on the finished compartment surface, and cover the sunshade net on the bracket for shade and rainproof.

Fourth, greenhouse coverage.

Greenhouse coverage is divided into single net coverage, omentum combined coverage, outer shed coverage and greenhouse coverage. When the single net and omentum are combined and covered, the two sides of the greenhouse are about 1 meter above the ground, and they are generally suspended and not covered. The outside of the shed is covered all around, mostly used for early spring night insulation.

The greenhouse is covered, generally 1 meter above the ground.

5. Coverage of each growth stage.

The main purpose of mulching after sowing is to maintain soil moisture and prevent soil compaction after heavy rainfall. Prevent insects and birds. The method is generally to cover the ground directly, but the net should be removed in time after the emergence of seedlings, so as not to hinder the growth of seedlings.

Short-term mulching after planting, one is to cover cabbage, cauliflower, Chinese cabbage, celery, lettuce, etc. after planting in summer and autumn, and cover until it survives, covering day and night, and can be directly covered on crops; The other is to cover the nightshade and melon beans planted in early spring to prevent frost.

I think it is possible to lower the temperature, and some plants should not be too hot, I think you should choose a corresponding cold-resistant film, so that you can have good protection for the plants.

After being covered with a shade net, it can block light, rain, moisturize, cool down and other functions. If it is covered in winter, it also has a certain humidifying effect. If you choose, choose something thicker, light-resistant, and freezing.

1. The shade net can be said to be indispensable in the planting industry all year round, and it is a new type of agriculture, fishery, animal husbandry, windbreak, soil cover and other special protective covering materials, and its role can not be ignored.

2. The shade net is mainly used for heatstroke prevention and cooling, vegetables, fragrant aunts, flowers, edible fungi, seedlings, medicinal materials, ginseng, Ganoderma lucidum, cultivation of edible fungi and cooling and moisturizing of various farms.

3. The planting industry often says spring planting, summer busy, and autumn harvest, which represents the growth process of general crops from seedlings to maturity. In order to ensure production, shade nets have become one of the indispensable tools. In particular, the special shade net for vegetable greenhouses, it has the effects of cooling, disease prevention, disaster reduction, temperature increase, etc., and has high efficiency, easy to use, and is widely used in the seedling period.

4. The main function of covering the shade net in the hot summer is to prevent the exposure of the scorching sun, the impact of heavy rain, the harm of high temperature, the spread of pests and diseases, especially to prevent the migration of insect pests, and it plays a role in blocking light, rain, moisturizing and cooling after covering; After covering in winter and spring, it has a certain effect of frost protection, cold protection, heat preservation and humidification.

5. No matter in which season, the use of shade nets plays an important role, which protects crops and improves yields.

Summary. It is a new type of mesh agricultural plastic covering material that is lightweight, high-strength and age-resistant. The shade nets are available in black, silver-grey, white, light green, blue, yellow, and black and silver-grey.

The most widely used in production are silver-gray mesh and black mesh.

The silver-gray mesh has good light transmittance, has the effect of avoiding aphids and preventing the harm of viral diseases, and is suitable for early summer, early autumn and vegetable covering with high light intensity requirements. There are also differences in the shading and cooling effect after being covered by different specifications of sunshade nets. When the narrow mesh needs to be spliced and used, it should be sewn with nylon thread, and do not use cotton thread or commercially available plastic rope to prevent it from breaking due to aging during use.

How to choose a shade net in a greenhouse.

It is a new type of mesh agricultural plastic covering material that is lightweight, high-strength and age-resistant. The shade nets are available in black, silver-grey, white, light green, blue, yellow, and black and silver-grey. The most widely used in production are silver-gray mesh and black mesh.

The silver-gray mesh has good light transmittance, has the effect of avoiding aphids and preventing the harm of viral diseases, and is suitable for early summer, early autumn and vegetable covering with high light intensity requirements. There are also differences in the shading and cooling effect after being covered by different specifications of sunshade nets. When the narrow mesh needs to be spliced and used, it should be sewn with nylon thread, and do not use cotton thread or commercially available plastic rope to prevent it from breaking due to aging during use.

I am planting cut flower roses in the greenhouse, please ask what kind of Shuyang net is used in the greenhouse.

Hello! The one above this one can also be used.

The application of flat wire shading net in agricultural productionFlat wire mesh is made of warp and weft cross, warp and weft are all flat wire hand-sold materials, this kind of sunshade net has a low gram weight, and the use of materials is less and therefore cheap. The service life is also short, generally one to two years. The round wire sunshade net installed on the top of the greenhouse, the round wire sunshade net is made of round wire and weft, and the gram weight is high.

Regular manufacturers generally use virgin materials (new materials) for production, and their service life is also high, and the general manufacturers have a warranty of about five years. According to the different knitting density, the shading rate of the outer mesh will also be different. Aluminum foil inner sunshade curtain aluminum foil sunshade net is generally used in the greenhouse interior of the aluminum foil shading rate has %, according to the actual needs of the choice.

The function of the inner shade is to scatter sunlight into the inside of the greenhouse and avoid burning the seedlings. The choice of shading net in summer agricultural production is very important, and it is recommended to choose the sunshade net with a long service life and a quality assurance certificate for the external sunshade of the greenhouse.

1.Direct mulching cultivation.

Also called floating overlay. It is to cover the shading net directly on the furrow surface of the seedbed, and press the net at a certain distance to prevent it from being blown off by the wind. It is mainly used for seedling raising or seedling coverage of direct seeding vegetables; It can also be directly covered with shade nets on crops, properly fixed nets, and raised with the growth of crops.

2.Small arch cover cultivation.

Cover the shade net on the small arch canopy, so that it can be fixed while active, which can fix the hill and uncover the net. Generally, both sides of the net are 40-60 cm above the ground, which is conducive to ventilation.

3.Greenhouse mulching cultivation.

The existing plastic greenhouse skeleton is used for shading cultivation in strong light and high temperature seasons. The main ways of coverage are:

1.Use the card slot to directly fix the sunshade net on the scaffolding, and the two sides of the net are about meters from the ground, which can cover the strong light at noon. Light can enter the shed in the morning and evening during low light hours;

2.Cover the shade net on the plastic greenhouse film, fix it with a card slot on one side, and tie a rope on the other side, which can be covered or uncovered according to the weather changes and the needs of eggplant crop production;

3.Splice the sunshade into the size corresponding to the size of the greenhouse. In the shed, it is suspended above the crop at a height of one meter above the ground, and the two sides are fixed on both sides of the scaffolding;

4.At the shoulder height in the shed, a shade net curtain system is set up, which can be used manually or electrically shading system. It can be covered or opened at any time for easy use.

4.Flat-topped shade canopy cover cultivation.

The flat-roofed shade shelter is a special facility for shade cultivation, which is composed of a contemplative skeleton and a shade net curtain system. According to the local climate conditions and the light requirements of the cultivated crops, the appropriate size and shade rate can be selected. The curtain system adopts manual curtain reporting or electric curtain pulling, which can quickly and conveniently close or open the shade net, which is an ideal special facility for shade cultivation.

Flat-topped shade canopies are easy to use and have significant benefits, and their one-time investment is lower than that of plastic greenhouses. In the southern region of China (including the middle and lower reaches of the Yangtze River and South China) with strong light and high temperature during a long period of summer and autumn; There are many applications, and the effect is obvious.

The role of the shade net is mainly sunscreen, not heat preservation, if you want to keep warm, it is better to use film.

Pepper summer cultivation should choose SZW-14 SZW-16 model shading rate of more than 50% of the shade net, if the local aphid occurrence is more serious, should choose silver gray shade net, strengthen the greenhouse anti-aphid effect, reduce aphid damage.

There are two main forms of greenhouse covering shade nets:

1) Directly covered on the plastic film, also known as external sunshade covering, the sunshade effect is good, and the cooling effect is also better, but it is easy to suffer from wind damage and poor windproof effect. (2) Hanging under the plastic film, also known as the inner shade covering, is not easy to suffer from wind damage, and the windproof effect is good, but it has little impact on the lighting of the greenhouse, and the cooling effect is not good.