The temperature rises and the light enhances the management of shed vegetables.

With the increase of temperature in spring, the night temperature in the shed is also greatly increased. At this time, improper management of shed vegetables can lead to leggy, high-temperature disorders and hormonal poisoning, causing problems such as falling flowers, falling fruit, yellow leaves, and premature senescence. It is suggested that the current vegetable management should be well-prepared for the three defenses

One must prevent leggy. As the temperature gradually rises and the temperature difference between day and night becomes smaller, vegetable plants are prone to leggy, especially for eggplant vegetables and melon vegetables. If the plants are too long, it is easy to cause the plants to fall, and even if they are sitting, they are prone to deformed fruits such as empty fruits. To prevent leggy, we must first pay attention to the temperature difference between day and night; next, the amount of nitrogen fertilizer application should not be too large, try to increase the application of phosphorus and potassium fertilizer, promote plant fruit set. If necessary, it can be used to control tomatoes and sweet peppers, and use 3000 times more love or 750 times as a booster. For melons and vegetables, it can be sprayed with 750 times as strong and 1500 times as strong as CMC.

The second is to prevent heat barriers. After entering late April, the temperature is high and the light is strong, and vegetables are prone to high-temperature disorders such as sunburn. It is suggested that in the recent vegetable management, leaf picking should not be excessive. In addition to anti-high temperature, but also timely foliar spray of boron and calcium fertilizers, in order to promote flowering fruit set, anti-umbilical rot and other physiological diseases.

The third is to prevent hormone poisoning. After the temperature rises, when the vegetables are used for flowering or picking melon, the concentration of the anthers should be reduced accordingly, and the principle of using the hormone concentration limit at high temperature should be used. Excessive use of hormone concentration will often affect the flower bud differentiation, resulting in leaf shrinkage, deformity, growth obstruction, malformation, the current tomato peach fruit and cucumber head cucumber, most of the farmers did not reduce the concentration of thistle or point anthers . After the discovery of vegetable hormone poisoning, it can be sprayed with alizarin lactone (Yunda 120) or love more than 6000 times or nucleotide (green wind 95) 400 times for remission.

Medical ultrasound (also known as diagnostic sonography or ultrasonography) is a diagnostic imaging technique based on the application of ultrasound. It is used to create an image of internal body structures such as tendons, muscles, joints, blood vessels, and internal organs. Its aim is often to find a source of a disease or to exclude pathology. The practice of examining pregnant women using ultrasound is called obstetric ultrasound, and was an early development and application of clinical ultrasonography.

Ultrasound are sound waves with frequencies which are higher than those audible to humans (>20,000 Hz). Ultrasonic images, also known as sonograms, are made by sending pulses of ultrasound into tissue using a probe. The ultrasound pulses echo off tissues with different reflection properties and are recorded and displayed as an image.

Many different types of images can be formed. The most common is a B-mode image (Brightness), which displays the acoustic impedance of a two-dimensional cross-section of tissue. Other types can display blood flow, motion of tissue over time, the location of blood, the presence of specific molecules, the stiffness of tissue, or the anatomy of a three-dimensional region.

Compared to other dominant methods of medical imaging, ultrasound has several advantages. It provides images in real-time and is portable and can be brought to the bedside. It is substantially lower in cost than other imaging modalities and does not use harmful ionizing radiation. Drawbacks include various limits on its field of view, such as the need for patient cooperation, dependence on physique, difficulty imaging structures behind bone and air or gases,[note 1] and the necessity of a skilled operator, usually a trained professional.

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