Continuous innovation and process improvement with state-of-the-art production lines and inspection systems enable us to provide a wide range of pharmaceutical primary packaging solutions which contribute to customer's growth. Zhengli vials, cartridges, ampoules, pre-fillable syringes and other glass containers are widely used in pharmaceutical, ophthalmology, cosmetics, laboratory, artwork, stationery and other glass bottle packaging.
Products arrange from Prefillable Syringe,Autosampler Vials,Glass Oil Vials,Glass Perfume Bottle, Silicon Vials.
Application Prefillable Syringe,Autosampler Vials,Glass Oil Vials,Glass Perfume Bottle Ningbo Zhengli Pharmaceutical Packaging Co., Ltd. , http://www.zlpharmapkg.com
1. The difference in the type and amount of fertilizer, the difference in the degree of burning seedlings is obvious. Occurrence of burning plots, mostly applied to urea as a nitrogen source of compound fertilizer, that is, urine-based compound fertilizer, and other burning phenomenon. The main symptoms of plant performance after Application were less roots, smaller seedlings and wilting leaves. Under the same conditions, the urine-based type is heavier than other types of compound fertilizers. Fertilizer application amount is too large, which causes the roots and fertilizers to come into contact with the seed or seedling to cause burning and burning of seedlings. In order to avoid burning seedlings and reduce waste, it is advisable to control the application amount of seed fertilizer. Usually, it is appropriate to apply 15-20 kg of NPK fertilizer per acre. In particular, the application amount of seed fertilizer should be strictly controlled when earthworms are sown.
2. Seed isolation. Using different application methods, the symptoms of burning seedlings are different. Although the amount of fertilizer application is not too large, seed and fertilizer are mixed together, resulting in direct contact between the seed and the fertilizer and causing seed burning and seedling burning. For artificial fertilization, the seeds and chemical fertilizers are basically not isolated. When the maize seed or root system encounters chemical fertilizers, burning or burning of the seedlings occurs. Seed sowing, seed fertilizer applied at a time, although the seed and base fertilizer between 2 to 3 cm of soil isolation, but due to the concentration of soil solution in the fertilization layer, the roots under the bar, water absorption difficulties, plant performance short and thick, The amount of root hair is small, the leaves are narrow and curled.
3. Soil moisture. The maize seedling stage has more precipitation, the soil moisture content in the soil layer is good, and the fertilizer melts quickly. In addition, the rotary plough for many years hardens and shallows the plow bottom layer, and the root growth is limited. The local soil solution is in a state of high concentration, and the water supply is insufficient. Slow growth, which causes serious back flow in the body, and the plants lose water and gradually die. Under the premise of selecting high-quality compound fertilizers, deep plowing and organic manure should be applied to improve soil water storage and water supply capacity. At the same time, fertilization under different varieties should be applied laterally or deep between species, and at least the seeds and fertilizers must be isolated. 10 cm, you can effectively prevent the burning of seedlings, sprouting phenomenon.
There are three reasons for the burning of summer corn
In the countryside recently, farmers friends often report that it is easy for them to burn seedlings, which makes them very upset. Now solve this problem as follows. The occurrence of corn seedlings shows that the plants are weak, grow slowly, the leaves become narrow, the leaves are yellow-green or gray-green, there are few or no root hairs, and some black necrotic spots are visible. Caused a large area of ​​seedling deficiency, even if the supplement seedlings, but also make the production decline, the income decreased. The main causes of burning seedlings and their prevention and control measures are as follows: