Site conditions and preparation of pear tree
Site conditions of Lijianyuan:
(1) Daily average gas temperature from April to October: Qiuzi pear 14.7-8; Western pear 17.7-22.2; Sand pear 15.5--26.9; White pear 17.7-22.2.
(2) Annual sunshine hours: from January to December, the annual sunshine hours reach 1600-1700 hours.
(3) Annual rainfall: >=400 mm
(4) ph value: when 5.4, the plant grows vigorously and the result is good; when ph8.5, the result is affected and causes dead tree when it is serious.
Planting preparation:
1. The treatment of the garden before planting is fully deepened by 80 to 100 cm, and soil and manures and weeds are simultaneously applied. After the soil and manures are decomposed and decomposed, the lower soil conditions can be improved. When the labor is insufficient, it can also be planted along a ditch along the line, the ditch is 80-100 cm deep and 100-150 cm wide. Soil fertilizer and weeds were applied when returning to the soil. Since the roots of pear trees are mainly distributed above 30 cm, the fertile top soil should be filled above 30 cm.
2. Treatment of seedlings before planting The main side roots of the selected seedlings are properly trimmed, the ruptured parts of the tip are cut into flat stubble, soaked in water overnight, and then the roots of the seedlings after soaking are dipped in mud to prepare for planting.
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How do WiFi Camera Work ?
Monitoring cameras can also be installed without a network, but some functions cannot be used, such as remote monitoring. In order to make it easier for you to understand the knowledge related to the surveillance camera, I will use popular language to popularize science for you.
1: Camera introduction
Camera is an intelligent device that can capture and record video and monitor the environment in real time. It can not only record video, but also detect moving objects, sound, smoke, and even recognize faces.
The advantages of the camera are very obvious. It can help people better monitor the safety of their homes or offices, and help protect the safety of family members or office staff. In addition, it can also provide real-time video monitoring, provide more security guarantees, and help people better grasp the current security situation.
Among them, "intelligent camera" is a new technology in recent years, which can monitor the environment in real time and conduct intelligent identification. The intelligent camera adopts high-definition camera technology, which can clearly capture the on-site images within the monitoring range and conduct real-time monitoring. It can also analyze the captured pictures to identify the designated person or object, thus realizing intelligent monitoring.
In addition, the smart camera can also support remote monitoring. You can remotely view the real-time image of the camera through your mobile phone or computer, allowing users to view the image of the camera anytime and anywhere, to better protect the security of your home or office.
At present, cameras have been widely used in the security industry to monitor buildings, parks, schools and other places to protect the safety of the people. It can also be used in commercial places to help businesses achieve intelligent management, improve business environment and improve service quality.
2: Working principle of camera
The working principle of the camera is to reflect the light to the sensor, convert the signal captured by the sensor into a digital signal, and finally send it to the computer to display the image. Then the camera can capture the static and dynamic images in the picture.
The sensor of the camera is the most important part. It can capture light and convert it into electrical signals. There are many types of sensors, the most common are CCD and CMOS sensors, which can be used to capture images.
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