Four taboos for vegetable greenhouse filming

Cannot choose industrial film

The film is broadly divided into industrial film and agricultural film. In the production of vegetables, agricultural film must be selected. Industrial film must not be used because some industrial films contain some toxic substances, which harm the crops and even cause crop failure. Never. The agricultural film is divided into transparent film, black film, silver-gray film, etc. According to the season, crop type and covering purpose, different shed films are selected. Such as greenhouse vegetables for the purpose of heating and moisturizing should choose a transparent film; for ground temperature, weeding and moisturizing for the purpose of choosing a black film; anti-aphids can use silver gray film.

Avoid neglecting water management

Some people think that mulching film has the function of water retention, so water management is ignored. In fact, water retention should be water. Therefore, before covering with plastic film, the water in the soil must be sufficient, which is the key to ensure the normal growth of the emergence and seedling stage. Conversely, if the soil is thick, too much water, and lack of oxygen, it is not good for seed germination and root growth. Such a plot should be air-conditioned first, and cover with plastic film when the humidity is suitable, otherwise the roots will be destroyed easily.

Avoid blind sowing in advance. Plastic film mulching cannot be premature, because the cover film has good ground temperature, good moisture, and rapid emergence. It is susceptible to freezing due to late frost, which will cause seedling destruction. To determine the sowing date, three factors must be considered: First, the seedlings must protect the environment. The requirements of the conditions; the second is the local final frost period; the third is the number of days from sowing to emergence. When all three conditions are suitable, it is best to germinate before the final frost period sowing after the last frost period, so as to help increase yield and income.

Avoid blindly applying fertilizer

Some vegetable farmers blindly increase the amount of fertilizer applied in order to achieve high yields, especially when the seeds are applied at the same time or strips, which not only causes waste, increases costs, or even destroys seedlings. Some vegetable farmers also believe that mulching film can increase yield, use less fertilizer, and use less chemical fertilizer, resulting in later de-fertilization and affecting yield. When applying the bottom fertilizer, whether it is organic or chemical fertilizer, the fertilizer must be applied at the whole layer, and it must be turned deeper by 20-30 cm, and fully mixed with the soil to prevent shallow application on the top soil layer. The amount of fertilizer used must be accurate, not too much, and the applied organic fertilizer must be fully rotten.

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Fruit Powder

Fruit Powder


Fruit powder is made from 6-7 mature and fig or fig dried fruit by raw material processing, squeezing juice, filtering, clarifying, concentrating, spray drying, cooling, packaging and other steps.

Key points of production process:

Selection of raw materials: select 6-7 mature and fresh figs or dried figs. Raw material treatment and pressing for juice: wash the raw materials, add materials according to the proportion of 1kg water plus 1kg fruit, or 1kg dried fruit plus 5kg water, put them into a stainless steel pot, heat them to 85-90 ℃, keep them for 20-30 minutes, then stop heating, stand for 24 hours, and press for juice. Filtration and clarification: it is filtered by a screen filter, and then natural clarification or enzyme clarification. concentrate; Atmospheric pressure concentration and vacuum concentration can be adopted. It is concentrated under normal pressure in a stainless steel double-layer pot, and the heating steam pressure is 2.5kg/cm2. In the concentration process, pay attention to stirring, accelerate water evaporation, prevent coking, and concentrate to make the solid reach 28%. Each concentration should not be fed too much, and the time should be 40 minutes. Vacuum concentration, concentration under reduced pressure and lower temperature. Heating, steam pressure 1.5kg/cm2, temperature 50 ℃.

Spray drying: high pressure spray equipment was used to spray the dried fig juice concentrate. The feeding temperature was 50-60 C, the working pressure of the high pressure pump was 180 kg / cm, the dry additive paste powder was added 0.5%, the air inlet temperature was 120 C, and the outlet temperature was 75-78 C. Cooling and packaging: the dried fig powder is cooled quickly, and then packaged and sealed.

For Example: Blueberry Juice Powder

In addition to conventional sugar, acid and VC, blueberry fruit is rich in VE, VA, VB, SOD, arbutin, protein, Anthocyanin, edible fiber and mineral elements such as K, Fe, Zn and ca. According to the analysis and determination of 14 varieties of blueberry fruits introduced from the United States, the content of anthocyanin pigment per 100 grams of blueberry fresh fruits is as high as 163 mg, protein 400-700 mg, fat 500-600 mg, carbohydrate 12.3-15.3 mg, vitamin A as high as 81-100 international units, vitamin E 2.7-9.5 micrograms and sod5.39 international units. Vitamins are higher than other fruits. Trace elements are also high, with 220-920 micrograms of calcium, 98-274 micrograms of phosphorus, 114-249 micrograms of magnesium, 2.1-4.3 micrograms of zinc, 7.6-30.0 micrograms of iron, 0.8-1.2 micrograms of germanium and 2.0-3.2 micrograms of copper per gram of fresh fruit.


It is precisely because blueberry fruit is rich in nutrients. It is a nutritional and health fruit with high amino acids, high zinc, high calcium, high iron, high copper and high vitamins. It not only has good nutrition and health care function, but also has the functions of preventing brain nerve aging, strengthening heart, anti-cancer, softening blood vessels, enhancing human immunity and so on.


Health care function

Blueberries can delay memory decline and prevent heart disease, so they are regarded as super fruits. The US daily health news reported that recent research has added a good reputation to super fruit. Eating more blueberries or drinking blueberry juice can help prevent colon cancer.

The study found that blueberries can play this role because blueberries and other fruits contain a natural compound called pterostilbene, which helps prevent pre cancer damage to the body. Pterostilbene is an Antioxidant and anti-inflammatory agent, which is found in blueberries and blackberries.

Blueberries contain a lot of purple components, anthocyanins.


Blueberry fruit can significantly enhance vision and eliminate eye fatigue; Nourish skin; Delaying brain nerve aging; It has therapeutic effect on capillary disease caused by diabetes. Enhance cardiac function; Prevention of Alzheimer's disease and many other medicinal values.


Anthocyanins in blueberry fruit are very powerful antioxidants, which can help prevent the formation of plaque in arteries and a variety of cancers (folic acid prevents cervical cancer, etc.), reduce the possibility of cancer, reduce heart disease and delay aging.

blueberry powder

Fruit powder, Fruit Juice Powder, Watermelon Juice Powder

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