1. No seedling fertilization: If the crop lacks nitrogen, phosphorus, potassium or trace elements in the growth process, it will show up in the growth phase. If the purpose of supplementing deficiency syndrome is to improve the crop's deficiency performance. There are often such people in production, seeing others spray fertilizer, lest they fall behind the production, and no matter whether they lack the fat in the ground, they will spray with the wind, especially the spraying of nitrogen fertilizer. Taking wheat as an example, the seedling stage is thin and yellow, indicating that nitrogen deficiency should be based on nitrogen spray; if the seedling stage is long, it should be sprayed with nitrogen and phosphorus mixed; if the seedling stage is green, it should be sprayed. Phosphorus and potassium mixed liquids are dominant.
If the goal is to regulate physiology, stimulate flowering, pollinate, and increase seed setting rate, the role of trace elements in crop physiology and the sensitivity of crops to trace elements should be understood. For example, spraying 0.2-0.5% potassium dihydrogen phosphate solution before ripening of wheat can not only supplement nutrients but also resist dry hot air; boron can promote pollen germination and elongation of pollen tube and prolong flowering period, so spraying boron during flowering can increase fruit setting rate. .
2. The concentration ratio is too large: this phenomenon is very common. Generally, the fertilizer concentration of foliar spray is between 0.05% and 3%. When applied, it is always considered that the spray concentration is too low, and the concentration is increased at will, not only can the crop not be absorbed, but also cause side effects such as leaf burning. The most commonly used urea spray concentration is 1-1.5%, and the potassium dihydrogen phosphate spray concentration is 0.1-0.3%. The ammonium molybdate spray concentration is 0.05-0.1%. The borax (or boric acid) spray concentration is 0.05-0.2%. (When preparing, first dissolve the borax with a small amount of warm water, then apply to the water.) The concentration of ferrous sulfate spray is 0.1%--0.3%.
3. The use period is late: the external top dressing should be sprayed in the critical period of crop fertilizer. In production, the lag is often applied, and the best spraying period is missed, which does not achieve the expected increase in production. Generally, wheat should be sprayed after the heading, soybeans and peanuts are sprayed separately during the initial flowering and full flowering stages, and the corn is sprayed during the filling stage. The fruit trees should be sprayed during the full bloom period and the fruit expansion period.
4. Improper use: This phenomenon occurs most often.
(1) Small amount of spraying: Foliar spray fertilizer requires a large amount of fertilizer, generally 50-60 kg of prepared liquid fertilizer per acre. While some farmers in production are lazy and trouble-free, most of the authors see the liquid fertilizer (15 kg/pot) prepared in 2 pots per acre. The amount of fertilizer on the leaves of the crop is too small to achieve the desired effect.
(2) Less spraying times: the concentration of crop topdressing is generally low, the amount of absorption per time is very small, and the effective period of foliar topdressing is only 12-15 days. It is generally recommended to spray 2-3 times continuously. The interval between 8 and 10 days is appropriate.
(3) The spraying method is wrong: the production of foliar topdressing is mostly sprayed downwards. It is not known that fertilizer nutrients are absorbed into the body through the pores of the leaves, while the leaf pores are mainly in the back of the leaves. When spraying, the nozzles should face upwards, mainly spraying leaves. Back.
(4) The spraying time is wrong: the root dressing should pay attention to the spraying at high temperature. Some people think that the stomata of the leaves are open at high temperature, and the absorption capacity is strong. It is always sprayed at noon. However, ignoring the high temperature will cause the water to evaporate quickly and reduce the fertilizer efficiency. Generally, it is sprayed before 10:00 am and after 5 pm on a sunny day. In the cloudy days without wind, it can be sprayed all day.
5. Instead of root fertilization: For nitrogen, phosphorus and potassium, foliar fertilization is only an auxiliary method. For micro-fertilizer, foliar fertilization is the main method of fertilization, but foliar fertilizer can only supply sufficient fertilizer and water. The comprehensive effect on the basis of good prevention and control of pests and diseases is not a substitute for root fertilization. Long-term spraying will weaken the physiological function of the root system. Therefore, on the basis of soil fertilization, foliar topdressing should be applied as an auxiliary measure for rapid supplementation.
6. Improper mixing: In the mixing of liquid fertilizer and liquid fertilizer, mixed spraying of liquid fertilizer and pesticide, precipitation or failure occurs due to chemical reaction due to improper mixing. Before mixing, put a small amount of the solution of the fertilizer or medicine to be mixed into the same container. If there is no turbidity, precipitation, bubbles, etc., it means that it can be mixed. When preparing a mixed spraying solution, a micro-fertilizer is first formulated into an aqueous solution, and then other medicines and fertilizers are directly added to the prepared micro-fertilizer solution for dissolution. Urea can be mixed with various fertilizers and medicines; various micro-fertilizers cannot be mixed with grass-ash ash-alkaline fertilizers, and zinc fertilizers cannot be mixed with super-calcium phosphate.
Huaxian Agricultural Technology Promotion Center Shang Hongyan
Without exposing screws, the die-casting aluminum of LEDER technology`s LED inground light gives it excellent heat dissipation, prolongs its lifespan, and reaches its waterproof performance up to IP68. Humanized lighting mostly installed are lawns and undergrowth to avoid shining directly into your eyes, this inground light`s COB LED chips to shine over a 60° beam angle while the optical lens keeps the lights from dazzling your eyes.
This LED inground light features the ability to adjust the direction of the light from outside the fixture - leaving the factory seal intact. Featuring a cast brass housing that sits within a heavy-duty polymetric sleeve, it also offers silicone rubber gaskets at the lens, a potted driver, and a strain relief below, all designed to prevent water ingression.
Features:
• Sealed drive
• Modern minimalist design
• Group and control multiple lights with the smart life app
• Energy saving save electricity
• water impervious
• Color temperature :3000k-6000K
• Stainless steel frame
• Type of protection: IP20 /IP65 (Some models)
• Warranty:3 - 5 years
You can use this light where many people gather or where many activities take place. To meet different lighting needs, this light is suitable to be installed in soil, cement, stone, wood and other environments.Outdoor Shallow Inground LED Well Light round inground fixture with stainless steel finish framework, for outdoor use.
We have rich production experience in lighting. Except LED Inground Light, we also offered other product in Outdoor Lighting ,such as LED Flood Light , LED street Light , LED Inground Light, LED Spike Light ,LED Bollard Light ,LED Wall Washer,Outdoor Wall Light & step light as so on .
Inground Light,Inground Uplight,In Ground LED Lights,In Ground Up Lights
JIANGMEN LEDERLIGHT LIGHTING Co.,LTD , https://www.spikelights.com