Ammonia poisoning is prone to occur in vegetables in greenhouses in winter and spring, mainly due to the continuous high temperatures in the weather. It should cause farmers to pay attention to it and find that it is timely to take remedial measures after ammonia poisoning. China Agricultural Technology Network now introduces you as follows. Ammonia poisoning Symptoms: Poisonous vegetables appear light leaves of indeterminate lump-shaped patches, leaf edge burns. The roots of heavy plants are dark brown and lose their functions of absorbing water and fertilizer. The above-ground parts gradually wither and die. As a result, the growth and development of vegetables is not normal, resulting in serious economic losses in cultivation of greenhouse vegetables. Prevention and rescue measures: 1. Use pH test paper to discharge ammonia gas. Determine the pH concentration of the water droplets in the shed. When the pH is above 8.2, vent the air in time. 2, in addition to venting the exhaust, the first is rapid irrigation, reducing the concentration of soil fertilizer solution; the second is the external spraying of Huimanfeng and other active liquid fertilizer to balance the pH of the plant body and the soil; the third is to spray 1% vinegar on the back of the plant leaves. Can reduce or mitigate the hazards. 3, fertilization method Shelf vegetables vegetable base fertilizer or top dressing, should pay attention to the following points: First, the application of organic fertilizer as a base fertilizer, must be fully cooked; Second, chemical fertilizers and organic fertilizer can only be deep, can not be spread on the ground; Fertilizer can not be excessive, especially the fertilizer should be a small amount of multiple applications; four is suitable for fertilizer, or irrigation after application, so that fertilizer can be released in time release. Therefore, in the winter and spring seasons, we must pay attention to the weather conditions, timely venting and deflation, the most important thing is that the fertilization method should be correct, and a small amount of fertilization should be used so that the fertilizer can be decomposed in time and ammonia poisoning of vegetables will not be caused.
A contour measuring instrument is a precision equipment used to measure the shape of various mechanical parts' lines and cross-sectional contours. The instrument workbench adopts high-precision horizontal air floating track and rolling vertical track, with high movement accuracy, good stability, and long service life; High measurement efficiency, simple operation, suitable for use in workshop inspection stations or measurement rooms.
The instrument workbench adopts high-precision horizontal air floating track and rolling vertical track, with high movement accuracy, good stability, and long service life; High measurement efficiency, convenient card installation, simple operation, suitable for use in workshop inspection stations or measurement rooms. This instrument can further develop software according to the needs of users, meet their measurement shape requirements more widely, and is equipped with various equipment components for users to choose and use according to their own requirements.
A contour measuring instrument is a precision equipment used to measure the shape of various mechanical parts' lines and cross-sectional contours. In the bearing industry, it is possible to measure the contour shapes of various rolling elements and raceways, such as protrusion, contact angle, surface curvature radius, and reference part angle. In the mechanical industry, it is possible to measure the straightness, line profile, parallelism, inclination, and angle of various parts. Especially suitable for measuring the appearance of pistons in automobiles, tractors, and motorcycles. The production instruments of this research run enterprise are controlled by microcomputers, which automatically achieve measurement cycles, eliminate installation errors, directly display the shape and parameters of the measured parts, and can print graphics and data for product quality testing and process analysis.
Profile Measuring Instrument,Roughness Profilometer,Thickness Profilometer,Profilometer Surface Roughness Zhejiang dexun instrument technology co., ltd , https://www.dexunmeasuring.com