Sowing date and variety
Autumn spinach. Sowing from August to September, 30-40 days after sowing can be harvested in batches. Varieties should choose more heat-resistant, fast-growing early maturing varieties, such as Ploughshare spinach, Hua Bo 1, Guangdong round leaves, spring and autumn leaves.
Overwintering spinach. Seed sowing in early-mid-November-November, harvesting in batches before and after the Spring Festival, it is recommended to use medium and late-maturing varieties with strong winter, late bolting and strong cold resistance, such as Yuan Ye Bo, Chi Yuan Ye Bo, Hua Bo No. 1, Liaoning Yuan. Ye Bo and so on.
Spring spinach. When the temperature rises above 5OC after spring, the seeds can be sowed. March is the appropriate time for sowing, and the harvest should be carried out 30-50 days after sowing. The varieties should be selected for late leafing and leaf hypertrophy, late leaf spinach, spring and autumn leaf, and Shenyang round leaf. , Liaoning round leaves and so on.
Summer spinach. Seed sowing in stages from May to July, and harvested gradually from late June to mid-September, we should choose Huabo No.1, Spring and Autumn Leaf, and Guangdong Round Leaf with strong heat-resistance, rapid growth, and no convulsions.
Land preparation
Choose loose and fertile, water and fertilizer, irrigation and drainage conditions are good, slightly acidic loam, PH value of 5.5-7. During the site preparation, the Mushi rotted 4,000 kg of organic fertilizer, 40 kg of superphosphate, and the entire leveling was fine. In winter and spring, the sorghum should be made. In summer and autumn, the sorghum should be used, and the width should be 1.2-1.5 meters.
Sowing seedlings
Smearing is generally used. In the summer and autumn, seeds are soaked in water for 12 hours before sowing for 1 week. They are then placed in a well or treated in a refrigerator or freezer at about 4OC for 24 hours, then germinated under 20-25OC conditions, after 3-5 days of budding. sowing. Winter or spring can broadcast dry seeds or wet seeds. Acres 3-3.5 kg sowing.
After planting water, plant the surface water, sow the soil with the gingivae, so that the seeds are sown in the soil, and a layer of plant ash is added to the surface.
After summer and autumn sowing, it is necessary to cover with straw or use a small arch to cover the shade net to prevent high temperatures and heavy rain from scouring. The soil is often kept moist, 6-7 days can be seedlings, winter sowing temperature is low, then cover plastic film or shading net insulation to promote seedling emergence after the emergence of removal.
Field management
After the true leaves of the spinach were poured, they were poured with cleansing water once; after 2 true leaves were combined with thinning, the weeds were topped and then concentrated, and the manure was applied more than in the early stage; the top-dressing stage was top dressing 2-3 times, and each urea was used. 5-10 kg.
The soil remained moist after sowing in winter spinach. When 3-4 true leaves are used, proper control of the water is beneficial for wintering. 2-3 true leaves, seedlings 3-4 cm. According to the seedlings and the weather, the water and fertilizer are applied, and the human fecal urine is mainly decomposed. Frost and snow and ice weather should be covered with plastic film and shade net insulation, can be covered with a small arch. After the spring is over, select the sunny day to chase after the use of decomposed pale dung water and prevent the morning bolting.
The early spring spinach must be covered with plastic film insulation, which can be directly covered on the surface. After emergence, the film is removed or replaced by a small shed. The small arch sheds cover the night cover and the clear rain cover makes the seedlings more visible and more stable. , And time seedlings. Follow-up fertilization water, in the early stage of the transformation of human faecal light, hard-working facilities, especially in the early 15 days before harvest to apply nitrogen available fertilizer.
After the emergence of summer spinach, it is still necessary to cover the shade net, cover the shade with clear cover, and cover it as early as possible to facilitate cooling and heat preservation. Watering at the seedling stage should be performed in the morning or in the evening. After 2-3 true leaves, topdressing twice available nitrogen fertilizer. Water should be poured after each fertilization to promote growth.
Pest control
Aphids sprayed with 40% dimethoate 1000 times, or 50% anti-influx 2000-3000 times spray; leaf miner flies with 50% phoxim EC 1000 times, or 80% trichlorfon powder 1000 times spray; frost Mycoticosis was sprayed with 58% Leidormil 500-fold, or 75% chlorothalonil 600-fold; anthrax was sprayed with 50% thiophanate-methyl 500-fold, or 50% carbendazim 700-fold spray.
Timely harvest
General seedling height above 10 cm can be harvested in batches. About 15 days before a single harvest, 9-20 mg/kg of leaf sprayed with 15-20 mg/kg can be used, and urea or ammonium sulfate can be added to achieve early harvest and increase yield.
Species
The sowing date of spinach sowing may be later than that of overwintering spinach. Drilling, spacing 20-23 cm. After returning to spring in spring, the male plants were removed and the early male plants were twitched. Some of the male plants were maintained so that the plant spacing was about 20 cm. Congestion period should not be more irrigation, so as to avoid thin and weak lodging buds, reduce seed production. After flowering, top dressing, irrigation and foliar spraying of 1%-2% calcium superphosphate clarified the seeds. The male plants were sown and the male plants were removed to facilitate ventilation. The stems and leaves are mostly yellow, the seeds are harvested when they are ripe, and they are threshed after a few days of ripening.
DVR 5MP, also called the Digital Video Recorder DVR 5MP/ Digital Video Recorder 5MP/ DVR CCTV 5MP/ DVR 5MP 4CH/ 5MP HD DVR/ 5MP DVR Security System, means that this Digital Video Recorder has 5 million pixels.
So what does 5MP pixels stands for?
The letter "M" means million, and the letter "P" means pix, so 5MP means 5 megapixels. MP refers to MegaPixel.Some cameras only display 1M, 3M, 5M, etc.,. more specifically speaking, 5MP means that the camera is set at 5 million pixels to take photos. By analogy, 3MP is 3 million pixels, and 16MP is 16 million pixels.
So does the pixel mean?
The pixel refers to the smallest unit in an image represented by a sequence of numbers.
The pixel is composed of the small aquares of an image. These small squares have a clear position and assigned color value in this image, and the color and position of the small squares can determine what this image looks like. We can regard the pixel as the indivisible unit or element in the entire image. The pixel is indivisible, which means it can't be cut into smaller units or elements because it exists as a single color grid. Each bitmap image contains a certain amount of pixels, which can determine the size of the image on the screen.
The pixel for the camera actually means the maximum pixel. Pixel is the unit of resolution. This pixel value only refers to the maximum effective resolution the camera supports.
For example, the resolution of 0.3MP is 640×480, 0.5MP is 800×600, 0.8MP is 1024×768 5" (3.5×5 inches), 1.3MP is 1280×960 6" (4×6 inches), 2MP is 1600×1200 8" (6×8 inches) 5" (3.5×5 inches), 3.1MP is 2048×1536 10" (8×10 inches) 7" (5×7 inches), 4.3MP is 2400×1800 12" (10×12 inches) 8" (6×8 inches), 5MP is 2560×1920 12" (10×12 inches) 8" (6×8 inches), 6MP is 3000×2000 14" (11×14 inches) 10" (8×10 inches), 8MP is 3264×2488 16"(12×16 inches) 10" (8×10 inches), 11MP is 4080×2720 20" (16×20 inches) 12" (10×12 inches), 14MP is 4536×3024 24" (18×24 inches) 14" (11×14 inches), and all these are the approximate dimensions.
When we measure the picture size in pixels, we need to specify its fixed resolution first, then we can convert the picture size to the actual size. For example, the commonly used resolution of the pictures in the web page making is 72, that is, 72 pixels per inch, and 1 inch is equal to 2.54 cm. Then, through conversion, we can know that each cm is equal to 28 pixels; another example is a picture with the size of 15x15 cm, which is equal to 420*420 pixels.
DPI means ** dots per inch
LPI means ** lines per inch
PPI means **pixels per inch
In conclusion, we should pick up the most suitable pixels when we choose the security cameras and DVRs.
DVR 5MP, Digital Video Recorder 5MP, DVR CCTV 5MP, DVR 5MP 4CH, 5MP HD DVR, 5MP DVR Security System
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