Preparation method of nanometer light-converting shed plastic film for kiwifruit planting

Abstract

The invention relates to a preparation method of a nanometer light-converting shed plastic film for kiwifruits, wherein the preparation method sequentially comprises: modified master batch preparationand nanometer light-converting shed plastic film synthesis. According to the present invention, the nanometer light-converting shed plastic film prepared by the method has characteristics of good gloss and good uniformity, can inhibit the deliquescence of light-converting agents, has a prolonged service life, and still has a good light-converting effect after use for 9 months, wherein the conversion emission spectrum is maximally close to the absorption spectrum of kiwifruits, such that the sunlight absorption and utilization of kiwifruits is enhanced, the phenomenon of infrared radiation isavoided, and the temperature difference between day and night in the shed is low so as to increase the yield of red-fleshed kiwifruits, wherein the yield is up to 5102 kg / mu, and the yield is increased by 28.13%; and the fruit quality is improved, the soluble sugar content is 14.86%, the titratable acid content reaches 2.89%, and the vitamin C content reaches 2098.52 mg / kg.

Description

technical field [0001] The invention belongs to the technical field of agricultural films, and in particular relates to a preparation method of a kiwifruit nano light conversion film. Background technique [0002] Kiwi fruit is a fresh and tender fruit with rich nutrition and delicious flavor. The phenological period of kiwifruit is from March to November, of which September to November is the fruit ripening period. It is suitable for growing in an environment with sufficient sunlight and fertile soil, and is not suitable for high temperature or cold environments. Its growth requires a warm and humid climate. In addition to not being resistant to drought, kiwifruit is also afraid of waterlogging. In recent years, kiwifruit has been planted with rain-shelter cultivation technology. Compared with the outdoor cultivation mode, rain-shelter cultivation is not only convenient for management, but also ensures that kiwifruit is not affected by climate, diseases and insect pests du...

AI Technical Summary

Problems solved by technology

[0003] Because kiwi fruit requires a warm and humid climate during the growth process, most of the currently used shed films are ordinary polyethylene or polyvinyl chloride plastic films, which mainly play a role in heat preservation. During the use of the shed film, it receives sunlight during the day to heat up the shed. Convection heat dissipation and cooling to avoid air flow, so that the shed can be heated by light and closed for heat preservation; but at night or in rainy weather, there is no external heat supplement in the shed, and the temperature inside the shed is higher than the external temperature. All the stored heat is radiated outward in the form of "infrared radiation", causing a large amount of heat to be lost and the temperature to drop rapidly

Large temperature fluctuations are extremely unfavorable to the growth of kiwifruit, directly affecting its yield and quality; the light-changing film that appears on the market absorbs the ultraviolet light that is harmful to plants in the sun and the green light that cannot be used due to the reflection of plants. It is transformed into the red light or blue light needed for plant growth, but there is a poor match between the released light and the absorption of plants, and the light conversion agent decays to decomposition, resulting in unstable light conversion effect; the light conversion agent has a short life and cannot be synchronized with the application period of the greenhouse film. The particle size of the added light energy conversion material is closely related to the optical properties and physical and mechanical properties of the light conversion film. If the particle size is large, it will not only be unfavorable for uniform dispersion into the polymer resin, but the luminous efficiency will not be fully utilized, and the added Into the polymer material will cause the physical and mechanical properties of the film to decline, affecting the light transmittance of the film

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