How to enhance lighting in greenhouse fruit trees
Sheltered fruit trees need to have good light, but the light intensity in the greenhouse is generally only 60% to 70% under natural conditions. At the same time, the winter and spring natural illumination time is short and the intensity is poor, which can not meet the needs of fruit tree growth. Mainly for the growth of fruit trees slender, thin pale leaves, after flowering, the fruit set rate is low, the fruit quality is poor. Therefore, in order to achieve high yields and high efficiencies, fruit trees must be first dealt with in the shed. Based on years of production practice, the author summarized several measures to enhance the lighting of fruit trees in the greenhouse for readers' reference.
First, shady room construction should be less shading
Shed shelters should be selected, sunny spots, facing south and extending east and west. If there are adjacent sheds, the distance between the sheds should be maintained from 7 to 8 meters. It should be maintained at 9:00 a.m. on the winter solstice so as not to shade each other properly. In the premise of ensuring the structure of the shed is firm and easy to control temperature and humidity, the height of the shed must be properly reduced. The lower the height of a typical shed, the better the lighting effect. According to different tree species to determine the appropriate height of the shed, the shed height of 2.5 meters as the bottom. The structural pillars of the sheds should be less, and the pillars should not be too thick or too wide. The shade of the arches of the sheds should be so narrow that they would be less shady. Appropriate greenhouse lighting angle can increase lighting in the shed, the lighting angle is generally 24 to 28, and the angle of the rear roof is about 45 degrees.
Second, choose a good film and keep it clean
It is advisable to choose a transparent shed film such as polyvinylidene chloride-free long-life film and polyvinyl chloride fog film. Dropless film can improve the transmittance of 20% to 30%. The dust and snow on the cover film can be covered with a broom or wood poles or cleaned with a motorized sprayer. The inside and outside of the film can be kept clean, increasing the amount of light injected, which can enhance the effect of light. .
III. Selection and planting of tree species
Should choose tree dwarf tree species (variety) planting. In order to increase the utilization of light energy, it is necessary to plant trees in the north and south, and plant ridges in high ridges. The height of the trees in the northern part of the tree group is the highest in the north, and the lowest in the south is to form a slope with a north high and a low south.
Fourth, trimming and ventilation
For the fixed height of the seedlings, the front part of the tree is lower and the rear part is higher. The tree shape preferably grows one main branch along the east-west direction to form two main branches of the “丫†shape.
Through pruning, the air-transmitting and light-transmitting tree structure is constructed to evenly distribute all kinds of branches in the crown. During the growing season of the tree, pay attention to the topping of the tree, remove the standing branches, dense branches, and the buds at the slashing mouth, so that the light distribution within the canopy is reasonable and sufficient to prevent the overlapping, crowded and disorderly branches, resulting in canopy closure.
Fifth, increase lighting
An hour after sunrise, the grass is covered and grass is covered after sunset. The roller shutter can be used to uncover the grasshopper, which not only improves the work efficiency but also saves labor.
Even cloudy days, snow days, not only short illumination time and weak light intensity, lack of light should be installed to supplement the light source, increase lighting fixtures (such as high pressure sodium, red light, incandescent, fluorescent, etc.). For incandescent lamps, at least 2 to 500 watt incandescent lamps in a shed. After the leaves have been opened from the fruit tree, after the curtains are uncovered in the morning or in the evening, the light is turned on and the light is supplemented for no more than 3 hours per day.
Six, shop reflective film, hanging reflective screen
A zirconium-coated zirconium film is applied on the floor to reflect upwards from the ground, and the ground light can be reflected to the lower part of the crown. The laying of the retroreflective film can increase the light absorption at the top and back pudendal parts of the drooping fruit, increase the light intensity of the middle and lower layers of the crown, and promote the results and overall coloring. Reflective film, the average coloring index can be increased by 25% to 30%.
The retroreflective film is generally applied 20 to 25 days before fruit coloring. Laying reflective film should be walked along the tree and tiled on both sides of the tree. The outer edge of the reflective film is in line with the outer edge of the canopy, and can fully exert the effect of the reflective film. Reflective film can be used as a light curtain, attached to the back wall of the greenhouse, can increase light 20% to 30%.
In addition, timely ventilation can reduce the humidity inside the shelter, eliminate fog in the shelter and increase the light transmittance of the greenhouse.
The Zoom Bullet Camera means that the Zoom Bullet Camera/ Zoom Bullet Network Camera/ Waterproof Zoom Bullet Cameras/ Zoom Bullet Camera CCTV/ Zoom Bullet Surveillance Cameras/Infrared Bullet Zoom Cameras belongs to not only the Zoom Camera but also the Bullet camera. We have introduced the basic features of the Bullet Camera before, so this time let me introduce the maintenance skills of the Bullet Camera(including th Zoom Bullet Camera)for you.
The maintenance skills of the Zoom Bullet Camera
1. The basic conditions to maintain the Zoom Bullet Camera
The basic maintenance conditions required for the normal equipment maintenance of the Zoom Bullet Camera
system are the "four complete". That is, the complete spare parts, complete accessories, complete tools, and
complete instruments.
1) Complete spare parts
Generally speaking, the corresponding spare parts library(which mainly stores some important equipment that is not easy to repair immediately after damage, such as the Bullet Cameras , lenses, monitors, etc.) must be established for the the maintenance of each system. Once these equipment fails, the system may not operate normally and must be replaced in time. Therefore, a certain number of spare parts must be available, and the inventory of the spare parts library must be continuously updated according to the repairability of the equipment and the characteristics of the operating cycle of the equipment.
2) Complete accessories
Accessories are mainly the additional configuration of the various discrete components and modules in the equipment, which are mainly used for equipment maintenance and to prepare more accessories would be better. The commonly used accessories mainly include various integrated circuit chips and circuit discrete components, required by the circuit. Other larger equipment must be equipped with the certain functional modules for the emergency use. In this way, a lot of expenses for updating equipment can be saved with a small investment.
3) complete tools and testing instruments
The Zoom Bullet Camera must be equipped with the common maintenance tools and inspection equipment, such as various pliers, screwdrivers, electric test pens, electric soldering irons, adhesive tape, multimeters, oscilloscopes, etc. If necessary, the user should also make some testing tool such as the simulated load.
2. The specific maintenance skills of the Zoom Bullet Camera
1) Dust and clean the equipment once a quarter to ensure the normal operation of the machine. Meanwhile, check the ventilation, heat dissipation, dust removal, power supply and other facilities of the monitoring room. The outdoor temperature should be -20℃~+60℃, the relative humidity should be 10%~100%; the indoor temperature should be controlled at +5℃~+35℃, and the relative humidity should be controlled at 10%~80%, make the monitoring equipment in a good operating environment.
2) According to the instructions of each part of the Zoom Bullet Camera system, check the technical parameters and the quality of the transmission line of the monitoring system every month, handle the hidden troubles, and assist the monitoring supervisor to set the various data, to ensure the good condition and normal operation of this equipment' each part' functions.
3) Thoroughly inspect the parts of the Zoom Bullet Camera equipment that are prone to aging once a month. Once the aging phenomenon is found, it should be replaced and repaired in time, such as the video head.
4) Maintain the monitoring equipment that works for a long time regularly once a month.
5) Monitor the operation of the Zoom Bullet Camera system and equipment, analyze the operation, find and
troubleshoot in time.
6) Optimize the Zoom Bullet Camera system and equipment regularly every month.
7) Provide the monthly regular information service: for example, on the first working day of each month, last month's repair and maintenance records should be submitted to the person in charge of the monitoring center, in the form of electronic files.
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