Due to the large temperature changes in spring and the unstable state, the peppers during flowering and fruit setting period are easily affected by environmental conditions, resulting in falling flowers. There are many reasons for the falling of the peppers, both physiological and pathological. Pepper is an air-dry and humid soil. If the temperature is too high (more than 35 degrees), it will affect pollination and fertilization, or it will encounter rainy days for a long time, so that the light will be insufficient and the temperature will drop (below 15 degrees). Affect pollination and pollen tube elongation, resulting in falling flowers.
Droughty soil, lack of moisture, and large amount of air evaporation will also inhibit the plant's demand for fertilizer and water and cause fruit drop and fruit drop. Excessive water content and poor permeability may impede root respiration and growth. Even roots may cause fruit failure.
Application of fertilizers requires comprehensive nutrients, requires NPK combined application, excessive or insufficient nitrogen fertilizers, or lack of phosphorus and potassium, so that the application of fertilizers is unbalanced and the supply of various nutrients is inconsistent, causing flowers and fruits to fall due to insufficient nutrients or nutritional disorders. Falling fruit.
Too dense planting leads to poor ventilation, insufficient illumination, reduced photosynthesis, and poor male flower development, making the first and second layer flowers easily fall off. The prevention measures are as follows:
First, implement rotation. The selection of disease-resistant varieties, the planting of disease-free healthy seedlings, not planted broken root seedlings, reasonable dense planting, improve ventilation conditions, so that plants have a good growing environment.
Second, strengthen the management of temperature and humidity. In the flowering stage, ventilation should be increased. During the day, the greenhouse temperature should be kept between 20 and 27 degrees. When the temperature is not less than 15 degrees at night, it can be ventilated day and night. Only with good ventilation, the plants can thrive and the fruit setting rate is high.
Third, strictly control the fertilizer, a reasonable fertilization. Before the fruit is not set, it can be topdressing without watering, so as to control vegetative growth and promote reproductive growth. When applying topdressing fertilizer, phosphorus and potassium fertilizers should be added to reduce the amount of nitrogen fertilizer. Into the flowering period and fruit setting period, the rapid expansion of fruit requires a large amount of nitrogen and phosphorus. Potassium fertilizer.
Fourth, control the soil moisture. Peppers generally require air humidity of 55% to 65%, soil moisture of about 15%, if higher than 18% will affect the root development and plant growth, but should maintain the soil moist in the full fruit period.
Fifth, prevention and treatment of diseases. The main diseases of pepper are virus disease, anthrax, and cotton rot. Virus disease can also cause the plants to shrink, and they cannot grow in branches, which seriously affects the yield. Virus disease caused by aphids should be thoroughly controlled as soon as possible, and be eliminated at the stage of spotting. It can be controlled by imidacloprid, dimethoate, and dichlorvos; aphids can be controlled by a moth killer or lime sulfur. Virus disease can be sprayed with virus A, phytosanitary spirit and so on.
Other diseases can be selected and controlled by pharmaceuticals such as Preclosure, Arostenone, Acryloxacin, Acperhyde, Benzothione, Carbendazim, Thiophanate-methyl and other agents.
In addition to the above measures, hormonal treatments such as 2,4-D or use of anti-dropping agents can be used to prevent flowering.
1. Considering the limitation of storage space and storage cost, as well as the fact that video recording in public places such as residential areas is a prerequisite for multi slot and a certain degree of clarity, video recording is generally deleted once a week or so. 15 days for general entertainment venues, 26 days for financial industry, and 3 months to half a year for banks, depending on the current venue regulations
2. The length of the storage time of the monitoring video is generally related to the following points: the capacity of the host's hard disk. Generally, a camera needs about 0.3G-0.5G of hard disk capacity for 24 hours of continuous video recording. Different systems have different parameters, the minimum is 0.15G/24 hours;
3. The number of cameras. The more cameras, the more capacity required. Also, the selection of the resolution and picture quality of the recorded picture will also affect the capacity required for video storage;
4. The video recording mode will also affect the space required for storage. The video recording mode is generally divided into [Mobile Video Recording] and [Continuous Video Recording]. The former means that the host starts to record when a moving object passes through the monitoring range, and does not record at other times. This can reduce the storage space required for video recording; On the contrary, continuous video recording is 24-hour continuous video recording.
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