The demand for fertilizers for different vegetables is also different. When we manage crops, we should prescribe the right medicine. So, what kind of fertilizer is suitable for celery? Celery is suitable for applying more nitrogen fertilizer, but it is not suitable for topdressing urea. Celery requires a large amount of nitrogen fertilizer during the whole growth period, and the top dressing should be based on ammonium bicarbonate. Do a small number of times, generally need to topdress 2-3 times. However, it should be noted that celery should not be applied with urea, because celery grows slowly after urea application, cellulose increases, plants are prone to aging, quality is reduced, and bitterness is consumed when consumed. Applying organic fertilizer can improve the quality of celery. The celery plants are tender and strong, the fiber is reduced, and the quality and yield are greatly improved. However, the farmer's organic fertilizer that is not decomposed can not be applied as a top dressing, so as not to cause burning roots. Applying micro-fertilizer can prevent celery physiological diseases. Calcium deficiency can cause celery to "burn heart", and boron deficiency can cause physiological diseases such as celery hollow and petiole cracking. Foliar application of 0.5% calcium chloride or calcium nitrate aqueous solution can prevent celery from "burning heart". In order to prevent the celery hollow and petiole cracking, 0.5-0.75 kg of borax may be applied per acre, or sprayed with 0.3%-0.5% borax solution. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone WiFi Solar Camera,Solar Ip Camera,Smart Surveillance Cctv 4G,Solar CCTV Camera System,Night Vision Infrared Solar Camera Shenzhen Fuvision Electronics Co., Ltd. , https://www.szsolarcamera.com
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What problems should we pay attention to when using solar energy for power supply?
1. The whole day sunshine time of monitoring points along the expressway shall be considered first. As the main energy of the power supply system comes from sunlight, the sunshine exposure time must be considered, which is particularly prominent in mountainous areas where there is little sunshine, but not in plain areas.
2. Working power, working voltage and current of monitoring facilities along the expressway. After considering the power of the whole load, we can choose the solar panel that is more suitable for the long-term operation of the equipment.
3. If the battery discharge cannot make the monitoring equipment work for a long time, the monitoring system will be paralyzed in the rainy season, but the expressway is prone to accidents in the rainy season.
4. The conversion rate of solar cells is low. At present, the conversion rate of solar cell power supply is only about 20%, that is to say, if the silicon solar cell is spread over a square meter, 100~200W of power can be obtained, which is obviously not enough to meet the long-term operation of the monitoring equipment. Of course, with the development of technology and the improvement of the quality of crystalline silicon cells, we can obtain more power resources in a smaller area in the near future.