Paving the reflective film in the apple orchard is an effective way to improve the climate of the orchard. In order to optimize the effect of the reflective film, the following issues should be paid attention to during use:
The material of the light film. The test compares that the use of vacuum aluminum plating and double-sided coating of the reflective film has the best effect. Among them, the thermal cladding is biaxially stretched, which has good oxidation resistance under the scorching sun and heavy rain. It can be used for more than 3 to 5 years with one purchase. And the reflective film will not tear when supported by wooden sticks. Poor quality reflective film sometimes oxidizes in the sun after a rain. The coloring of apple fruits requires a certain amount of cumulative light radiation. The test results show that at the end of August, the filming of Fuji apples generally starts at a temperature below 20°C, and continues until the right time for harvest. The Marshal Department of Apple began to spread the film in early August. In a variety of orchards, you can use mid-ripening varieties such as Marshal apples in the early stage, and then start paving late-ripening varieties such as Fuji when the mid-ripening varieties are mature. This can kill two birds with one stone. Spread the reflective joints to spread the film along the canopy, and the whole canopy is covered.
Management before and after the film. Before laying the film, level the ground and pick up the debris on the ground. The film cannot be pressed with soil. After laying the reflective film, in case of wind or rain, the fallen leaves, stagnant water, and soil on the reflective film should be removed in time to keep the surface of the film smooth and clean so as not to affect its reflective ability. According to the actual measurement, compared with the new film, the photosynthetically effective reflection radiation of the reflective film stained with soil is reduced by 60% at a height of 50cm.
Strengthen the fertilization of the orchard. Spraying CA2000 fruit amino acid multi-element micro-fertilizer 1 or 2 times before and after the film is applied to promote the nutrient absorption and photosynthesis of the fruit tree, which is beneficial to accelerate the coloring of the apple after the reflective film is applied.
Strengthen the canopy of fruit trees with good light and keep the light transmittance of the canopy above 18%. According to the measurement, to achieve the ideal effect when laying the reflective film, there should be at least a 60cm sidewalk between the rows of the second orchard. The solar radiation part can be directly irradiated on the reflective film to increase the intensity of reflected light. The light transmittance of the second tree body should be high. For trees with small crowns and sparse layers, the spacing should be increased, and the thickness of the leaf curtain layer should be reduced to allow light to penetrate, and the branch groups should extend uniaxially, and keep proper intervals. Third, strengthen the combination of autumn pruning and filming to remove useless long skills, competition, upright prosperous branches, shade overlapping branches, excessive shoots, retract the lower part of the canopy and mopping the ground, and wear a hat to pruning , Remove part of the young and tender autumn shoots, promote nutrient return and enrich the branches.
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