Pumpkins have different growth periods, and their nutrient absorption is different. Field management should be based on plant growth and soil fertility conditions as appropriate top-dressing, so as to achieve sufficient nutrient supply to facilitate high and high yields of plants. Pumpkin has a well-developed root system and strong ability to absorb fertilizer. Before planting, it is necessary to apply sufficient base fertilizer, mainly decomposed organic fertilizer, combined with nitrogen, phosphorus, and potassium compound fertilizer to promote the growth of pumpkin; base fertilizer has two types: broadcast and concentrated application Method, the spreading is generally combined with deep ploughing. After evenly spreading organic fertilizer or compound fertilizer, use the screw plough to rake twice to make the fertilizer and the soil evenly mixed. When there is less fertilizer, ditching and concentrated strip application are generally adopted, and the fertilizer can be applied in the sowing row. The top dressing of pumpkins during the growth period is mainly based on quick-acting nitrogen fertilizers, combined with the application of phosphate fertilizers and potassium fertilizers, according to the needs of different growth periods of pumpkins. Nitrogen fertilizer is the main topdressing in the seedling stage, and the purpose is to promote the growth of seedlings. In the fruiting stage, it is not only necessary to supply sufficient nitrogen fertilizer, but also require timely supplementation of phosphorus and potassium fertilizers to ensure that the fruit is fully expanded. Spray Zhuangguatilin during the expansion period to improve the ability of the plants to absorb water and fertilizer, promote the rapid expansion and development of pumpkins, and produce high yields. After the pumpkins are harvested, to prevent premature aging of the plants and increase later production, a small amount of organic fertilizer can be applied. If you do not harvest tender melons, but prepare to harvest mature melons, you don't need to top-dress in the later stage, only watering and drainage measures are needed. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone When installing security Outdoor Camera, you should first choose the monitoring host. Do you want to add a monitoring card to your computer, or do you want to use an embedded hard disk recorder as your monitoring host. The computer monitoring card is more suitable for places that are familiar with computer installation, have professional personnel on duty, and have more functional requirements. Its overall investment is relatively low. Since the monitoring card is installed in the computer, the computer needs to be started 24 hours a day; As for the latter, it does not require professional knowledge, nor does it need to be on duty, and it is relatively simple to operate. Outdoor Network Wireless Camera,Network Wifi Camera,4g Outdoor Solar Powered Camera,Solar 4g Cameras,Solar Powered Cctv Camera Shenzhen Fuvision Electronics Co., Ltd. , https://www.outdoorsolarcamera.com
To install security monitoring equipment, it is necessary to determine how many cameras are installed, and the quality and monitoring range of the cameras are affected. It is preferred to determine how many cameras are used for monitoring, and then determine the camera lens monitoring range according to how many cameras are available. Therefore, the distance from the camera to the monitoring point and the monitoring area must be clear. The infrared supply network recommends using the camera of 480 TV line, because it is more in line with that definition.
When installing security monitoring equipment, the third consideration is whether the camera has night vision function. If the monitoring is installed in a dark place, it is necessary to consider using a camera with infrared night vision function.
The security monitoring equipment can be installed via wired or wireless transmission. Although the cost of wireless network is relatively high, it can save a lot of installation trouble and make the monitoring site more beautiful. However, the installation of wireless network monitoring equipment should take into account the environmental problems of security sites. Cement building materials will shorten the wireless transmission distance, and metal building materials may complete the shielding of wireless signals. The infrared transmitter and infrared receiver should be far away from other appliances to avoid interference. Because the price of wireless network is almost twice that of wired transmission monitoring equipment, I suggest using wired transmission installation.
On site monitoring and network monitoring When determining the installation of the monitoring system, you should consider whether you need network functions. That is, if you need to monitor and control the monitoring site on the Internet at any time, you need to select a monitoring host with network functions. Avoid no network transmission function after installation.
A complete security monitoring equipment should at least have three parts: surveillance camera, PTZ and decoder. The following are their installation methods: