Do not apply on sensitive crops. The tolerance of chlorine to different crops and varieties varies widely. Therefore, the chlorinated fertilizer should be applied preferentially to crops with high chloride tolerance or medium chlorine tolerance, such as rice, large wheat, rapeseed, spinach, radish, beans, and tomatoes; for crops with weak chlorine tolerance, such as tobacco and tea, Lettuce, citrus, grapes, etc. are generally contraindicated with chlorinated fertilizer. In addition, different varieties of the same crop have different chlorine resistance. For example, among rice cultivars, hybrid rice has the strongest chlorine tolerance, and conventional early rice has weak chlorine tolerance. And the chlorine sensitive period of the crop is mostly in the seedling stage, such as rice in the 3 to 5 leaf stage; wheat in the 2 to 5 leaf stage, Chinese cabbage, Chinese cabbage and rapeseed in the 4 to 6 leaf stage. Therefore, even for chlorine-tolerant crops, it is necessary to determine whether or not to apply chlorine-containing fertilizers according to the tolerance of the variety and the growth period to chlorine, and to avoid "chlorine damage" as much as possible.
To prevent chloride ions from accumulating in the soil. Chloride-containing fertilizers are suitable for use in rainy seasons or areas with high precipitation, so as to use rainwater to allow more chloride ions to leach with water and prevent accumulation in the soil, thus effectively avoiding the “chlorine damage†of crops. Therefore, it is best not to apply or reduce the application of chlorinated fertilizer in dry land without irrigation conditions, saline-alkali land with poor drainage and high temperature and dry seasons, as well as water and dry areas.
It should be applied in combination with decomposed organic fertilizer. When applying chlorinated fertilizer, combined with the application of decomposed organic fertilizer, the fertilizer effect of chlorinated fertilizer can be improved and the adverse effect of chloride ion can be alleviated; in soil with low effective phosphorus content, chloride ion can inhibit the absorption of phosphorus by crops, often resulting in The lack of phosphorus nutrition in crop growth, so should pay attention to the application of appropriate amount of phosphate fertilizer when applying chlorinated fertilizer; complex (mixed) fertilizer with hydrochloric acid and urea, ammonium phosphate, calcium phosphate, calcium magnesium phosphate fertilizer, etc. Formulated fertilizer can not only reduce the harm of chloride ion, but also play a role in balanced fertilization due to the combination of nitrogen, phosphorus and potassium.
To master the scientific application method. Chlorinated fertilizer can be used as base fertilizer or top dressing, but it is not suitable for seed fertilizer. When the base fertilizer is used, it should be applied early and covered with soil. It is usually applied one week before sowing or transplanting, and applied to the lower side of the seed or seedling, preferably 5 to 7 cm from the topsoil. For top dressing, it can be applied by watering or pouring with dilute urinary water to apply or apply (not to spread), and it is 5 to 10 cm away from the crop plants. The application rate of the chloride-containing fertilizer at the seedling stage should not be too large. When it is applied in large quantities in the middle and late stages, it can be applied in 2 to 3 times depending on the growth of the crop, with an interval of 15 to 20 days.
Author: Wang Xiaobo
Source: Agricultural Science and Technology News
Magnetic rail lighting is a flexible and adjustable LED track lighting system, which is achieved by installing magnetic rails and lamps on the ceiling or wall. The system consists of a magnetic rail, a light fixture and a power supply.
Rails are usually made of aluminum and have built-in magnetic bars that can be easily installed on areas that require lighting. The magnetic rail luminaire is connected to the magnetic rail by magnetic force, so that it can move and position freely along the track. This design makes the installation and adjustment of the lamps very simple, and the layout and location of the lighting can be changed at any time according to the need.
The magnetic lighting system has a variety of lamp types to choose from, such as spot lights, down lights, wall washers, etc., suitable for different lighting needs. Lamps can be flexibly angled to illuminate specific areas or objects while providing accurate directional lighting effects.
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