Windy day management greenhouses In case of strong winds, the shed film will swell with the wind and beat it up and down. If it is not managed in time, the shed film will be blown and the shed will suffer frost damage. Management measures: Block all air vents tightly to prevent the wind from blowing into the shed to harm the strawberry plants and damage the film. Press the film and tighten, if necessary, put down some grasshoppers to hold the film firmly. If the wind blows at night, it is better to use a woven bag half a bag of soil to press on some grasshoppers to prevent the wind from scraping the grasshoppers.
Fog days often have fog weather in spring. In this weather, the sunlight in greenhouses is less than 1/5 of that in sunny days, the relative humidity of air is above 95%, and the indoor temperature is below 15°C. Such bad weather not only limits the photosynthesis of strawberry leaves, reduces photosynthetic products, and delays ripening of strawberries. For example, a few days of foggy days during the flowering period of strawberries will greatly reduce the fruit setting rate of strawberries and cause malformed fruit, leading to a decline in yield. Poor quality.
The first response is to increase artificial auxiliary lighting. An incandescent lamp can be used as a light source for heat treatment. Each 100 watt lamp is about 7.5 square meters, and is heated for 5 to 6 hours every day from 5 to 10 in the afternoon. The strawberry can increase production by 30% to 50%, and the deformed fruit can be reduced by 50%. The second is a reasonable temperature control. Temporary heating equipment is installed, heating is generally performed at night, and ventilation is performed for short periods of time before and after noon. The daytime temperature in the control booth is about 20°C and the nighttime temperature is above 10°C. The third is auxiliary pollination. During the strawberry flowering period, the stocking bees assisted in pollination and pollination by the bees can increase the fruit setting rate by 50% to 70%, significantly increasing the yield and quality of the strawberries, and increasing the economic benefits.
Natural pigments are food pigments obtained from natural resources. Pigments extracted mainly from animal and plant tissues and microorganisms (cultures), in which vegetative colorants predominate. Natural pigments not only have the function of coloring food, but also have physiological activity. At present, there are 48 kinds of edible natural pigments approved to be used in China, commonly used chili red, beet red, monascus red, cochineal red, gaolianghong, sodium copper chlorophyllin, turmeric, gardenia yellow, carotene, algal blue pigment, cocoa pigment, caramel pigment and so on.
Roselle Calyx Extract,Phycocyanin,Lutein,Butterfly Pea Flower Powder,Beta Carotene Powder,Sodium Copper Chlorophyllin
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