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 Doorbell Camera,360 Degree Camera, Night Vision Security Camera, Security IP Camera Shenzhen Fuvision Electronics Co., Ltd. , https://www.outdoorsolarcamera.com
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.
Corn big bell mouth to fine tube
The period of the "big bell mouth" in corn, which occurs between the jointing and tasseling stages, is a critical phase where both vegetative and reproductive growth are in full swing. During this time, the plant experiences rapid development of roots, stems, and leaves, with a significant increase in dry weight and overall biomass. The tassels begin to mature, and the competition for nutrients among different parts of the plant becomes more intense, both within individual plants and across groups. Farmers have found that implementing proper management practices during this stage can lead to substantial yield improvements. Therefore, the big bell mouth stage is not only essential for the plant's development but also a key moment for effective field management.
First, this stage demands high levels of fertilization. Corn requires maximum nutrient uptake during this time, so it’s crucial to apply top-dressing properly. The amount of fertilizer should be adjusted based on soil fertility and plant health. A recommended application is 30-35 kg of urea per mu, applied by digging deeply into the soil. If the crop is growing well, less or later application may be sufficient. However, if the growth is poor, it’s advisable to use potassium dihydrogen phosphate or highly concentrated humic acid liquid fertilizer at 120-150 g per mu. Spraying these solutions every 5-7 days can significantly improve plant health and growth.
Second, during the big bell mouth stage, corn has high demands for water, light, and oxygen. Soil cultivation plays an important role in improving aeration, water retention, and nutrient availability. It helps strengthen the base of the plant, promote root development, and reduce the risk of lodging. Weeding is also essential to conserve moisture and nutrients. At mid-stage, plowing should not be too deep—about 6-10 cm is ideal. After cultivation, applying a growth regulator such as maize syrup can help reduce plant height by 15%-20%, balancing vegetative and reproductive growth. This not only prevents lodging but also increases yields by over 15%. Spraying must be even, avoiding missed areas or reapplication. If rain occurs within 8 hours, adjust the spray volume accordingly.
Third, watering during the big bell mouth stage is vital. Water demand increases rapidly, making it a key period for irrigation. Proper watering improves the microclimate, supports pollination, and enhances seed-setting rates, ultimately leading to higher yields. It’s best to water separately during the small and large bell mouth stages. During the small bell mouth, water should be applied in small amounts through furrows. In contrast, the big bell mouth stage requires thorough watering. Monitoring weather conditions closely is essential to manage both flooding and drought.
Fourth, pest and disease control is critical during this period. Common pests include corn borers, armyworms, and cotton bollworms, while diseases like leaf spot can also appear. Regular field inspections are necessary to detect any issues early. If pests are present, using phoxim or biological agents can effectively control them. For diseases, applying fungicides like Antai or bacteriolytic at 600 times dilution, combined with 300 times diluted potassium dihydrogen phosphate, can be effective. Foliar sprays should be applied evenly to ensure complete coverage.