Oil sunflower is an abbreviation for oil sunflower. After two years of planting, it was found that the oil sunflower has strong adaptability, poor tolerance, strong resistance to stress, good oil quality, low labor costs, and is suitable for cultivation in the mountains. The yield per mu is 450-550 kg. The oil output rate is 40%-45%, and the output value is 2000-2500 yuan. The oil sunflower body is a treasure, and the oil sunflower cake is a very good protein feed for livestock. After the crushing, the sunflower plate is an excellent feed for pigs. The straw can be used to make fiberboard, paper, fuel, and pectin. The cultivation techniques are summarized as follows:
Choose good breeds. Use high-quality, high-yield, stable-producing, and disease-resistant varieties that are suitable for cultivation. Such as the United States short head DW567, DW667 and so on.
Fine site preparation. Before sowing, plunge 20-25 cm deep and flatten the ground. According to the conditions of fertility, apply 3-5 mang fertilizer per mu, 30-50 kg of superphosphate, 15-20 kg of ammonium bicarbonate, and 10-15 kg of potassium sulfate. , Or potassium compound fertilizer 40 kg.
Timely sowing. Sunflower growth period is generally 80-100 days, in order to avoid flowering grain filling period in the high temperature and rainy season, the sowing date should be in mid-June to late, should not be earlier than late. The sowing method is better on demand, with two grains per hole. The on-demand seed amount is 0.5 kg per acre. The sowing should not be too deep, generally 3 cm. When the soil layer is slightly arid, it is increased to 5 cm. When soil moisture is poor, it must be planted. Oil sunflower planting spacing 60-65 cm, plant spacing 25-30 cm, land with irrigation conditions, can increase the row spacing, reduce plant spacing, improve light conditions, increase production.
Scientific management.
1. Fertilizer management. The absorption of fertilizer by sunflower was less in the early stage and more in the later stage; more potassium was needed, followed by nitrogen, and phosphorus was the least. In the seedling stage, 5-7 kg of urea can be topdressed per acre. The flowering topdressing combined with watering ditch, 15-20 kg of urea per mus, 10-15 kg of potassium sulphate, the depth of fertilization is about 10 cm. The early days of oil sunflowers require small amounts of water, and too much rain can cause leggy. When there is water accumulation on the surface, they should be drained in time to prevent the death of rotten roots. During the bud to filling period, if there is drought, it should be watered in time.
2. Weeding and weeding. During the growing period of oil sunflower, 2-3 cultivators should be carried out. The first cultivator is combined with the seedlings, the second cultivating and cultivating is carried out one week later, and the third cultivator is carried out before budding. The soil is combined with soil and the height of the soil is 10 cm or more. To promote the deep roots of oil sunflower roots to prevent lodging.
3. Snoring ventilation. Some varieties in the disk formation period, the upper part of the axillary bud will grow branches, although it can also form a flower disk, but usually small disk, grain is not full, but also affect the development of the main stem disk. Branches should be removed promptly to promote the growth of the main stem disk. For overly luxuriant or diseased leaves, and the lower yellow leaves should be promptly removed to facilitate ventilation.
4. Put the bees pollinate. Oil sunflower is an insect flower crop that can be hardened by insect pollination. General use of breeding bees pollination, a box of bees can afford 5-6 acres of pollination. If there is no bee source, it is necessary to artificially assist pollination. The method is to put a pair of faceplates together and gently weigh it. The time should start from when the flowers are in full bloom, every 1-2 days, usually 2-3 times. . Each pollination performed best after morning dew to 11 am.
Since the 21st century, as the network technology develops, there is more and more demand for the storage of video data via the network. And then the monitoring system has further developed into an NVR(Network Video Recorder) system with network functions, from the DVR(Digital Video Recorder) system.
The Network Video Recorder, also called the NVR/ Network Video Recorder NVR/ NVR in CCTV/ NVR CCTV System/ NVR Recorder, is the storage and forwarding part of the network video surveillance system. The Network Video Recorder, without the analog-to-digital conversion and encoding functions, works with the video encoders(DVS) or the network cameras(IPC) to realize the video recording, storage and forwarding functions.
Let's see the specific software functions of the Network Video Recorder:
1. The user interface layout
The NVR software interface (GUI) is a human-computer interaction window. All the functions of the system, such as these operations of the channel parameter setting, the start and stop recording, the video browsing, the video playback, the video export, the PTZ control, and so on, are completed through this user interface.
The user interface layouts of different NVR manufacturers may vary greatly, but the main functions are similar. Generally speaking, the human-machine interface should have the reasonable layout, the applicable functions, and the simple operation, so as to conform to the user's operating habits.
2. The video browsing function
Generally speaking, all the video and audio channels in the system (including the channels under other NVRs) can be added to and displayed on the NVR software platform. A clear structured channel resource directory tree can be formed on the GUI to directly perform the on-site video browsing operations, with no need to firstly log in and connect different NVRs to load different NVRs first. There are two ways to browse the on-site video. One way is to directly drag the corresponding channel on the left to the target window display area, and the other way is to select the display window first, and then enter the shortcut key of the channel on the keyboard and press Enter.
3. The recording and storage function
The recording and storage function supports the video recording, storage, and backup.
4. The playback and export function
(1) The multiple playback modes
The video playback has a variety of modes, including the playback in time periods, fast playback of the alarm videos, and reverse playback at any time, and so on. During the playback, the user can play the video frame by frame, and also can add markers to the playback clips, so that he/she can find the corresponding clip he/she need easily when he/she needs in the future. Besides, various operations such as the normal playback, accelerated playback, slow-down playback, pause, and stop, can be performed during playback.
(2) The video export
(3) The multi-channel playback
If some on-site incidents occur, in order to fully know the situation of the surrounding scenes at that monitoring point, sometimes it is necessary to synchronize the playback of the videos from multiple channels, which will facilitate the panoramic display of the entire process of the event.
5. The incident investigation
6. The user authority management
7. The user operation log
8. The equipment management
In conclusion, the Network Video Recorder technology has been widely promoted and applied to the fields of urban security storage, national security and other engineering projects, because of its own advantages in many aspects. And the Network Video Recorder technology is bound to become the mainstream technology in the field of urban security high-definition video surveillance because of the driving of the market, technology, and so on. Undoubtly, the Network Video Recorder technology has very strong prospects for the theoretical research and practical application.
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