Plastic film covering technology

1, filming time: After the strawberry is planted in the fall, it is generally covered with plastic film in the two time periods before the winter and the early spring budding. In the cold area, the covering before the winter is more favorable, generally when the average temperature on the day drops to 3-5°C. More appropriate. The cover is too early to appear re-growth of strawberries, late freezing. Liaoning Province and Jilin Province are generally around the end of October. Central Hebei Province is in late November and Central Henan Province is in late December. In areas with warmer climates, the coating period can be appropriately delayed.

2, film coating method: apply some nitrogen, phosphorus, potassium compound fertilizer before coating, and remove dead branches and rotten leaves. The film should be selected in the windless weather, antegrade the mulch to cover the strawberry plants, so that the membrane surface stretch is not wrinkle, mulching around the mulching. If the dough is too long, it can be pressed laterally at a certain distance to prevent the film from being blown by the wind. Cold areas can be covered with a layer of straw or wheat to protect the insulation film.

3, breaking the membrane and withdraw the membrane: after the spring soil defrosting, first remove the cold-proof material on the membrane, remove the membrane surface clean, so that the ground temperature rises, prompting the strawberry to sprout early. The time of rupture of the membrane is about to begin in the period of strawberry buds.

The method is: Pull a small hole directly on the mulch of the plant and lift the seedling to the membrane. Care should be taken when the leaves pass through the small hole and the stem and leaf cannot be damaged. The membrane-breaking mouth around the plant was compacted with soil compaction, so that the mulch was pressed against the ground to enhance the coating effect. It is not easy to break the membrane too late. If the temperature under the membrane exceeds 30°C, not only the new leaf will be burned, but also the overwintering old leaves will dry out and the photosynthesis function will be lost.

4, remove the waste film: After the berry harvest, remove the waste film in time. Because the waste film is not easy to degrade, it contaminates the soil and affects the cultivation and growth of the crop.

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        The production process of goji berry juice concentrate

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