How to apply chlorine-containing fertilizer?

When is it appropriate to use chlorine-containing fertilizer? How to apply chemical fertilizer containing chlorine? How to use chlorine-containing fertilizer is the best? The following farming help planting network is briefly introduced for netizens' reference. Avoid sensitive periods for sensitive crops and crops there are great differences in sensitivity and tolerance to chlorine among different crops and varieties. Chlorine-sensitive crops are called chlorine-free crops, such as tobacco, tea, citrus, grape, watermelon, potato, Ziyunying, etc., generally do not apply or strictly control the amount of chlorine-containing fertilizer. There are differences in chlorine resistance among different varieties of the same kind of crops, such as among rice varieties, hybrid rice has the strongest chlorine tolerance. The chlorine tolerance of conventional early rice is weak, and the chlorine sensitive period of crops should be avoided. The chlorine sensitive period of general crops is mostly in the seedling stage, such as rice at 3-5 leaf stage, wheat at 2-5 leaf stage, Chinese cabbage, pakchoi and rape at 4-6 leaf stage. 2. Pay attention to the application method when using chlorine-containing chemical fertilizer as base fertilizer, it should be applied deeply and cover the soil in advance, generally one week before sowing or transplanting seedlings, on the lower side of seeds or seedlings, 5 ~ 7 cm away from the topsoil. When topdressing: take point application or strip application, and 5 cm ~ 10 cm away from the crop plant, do not spread fertilizer. When the application amount is large, it can be divided into 2 ~ 3 times. Topdressing can also be mixed with water or dilute dung and urine. Third, try to apply chlorine-containing fertilizers in rainy seasons or areas with more rainfall as far as possible, chloride ions can be leached with water and are not easy to accumulate in the soil, so side effects on crops can be avoided. However, dry land without irrigation, saline-alkali land with poor drainage, high temperature and dry season, and areas with lack of water and little rain had better not use or use less chlorine-containing fertilizer. 4. the combined application of mature organic fertilizer and phosphate fertilizer can improve the fertilizer efficiency and reduce the adverse effect of chloride ion on soil; in the soil with low available phosphorus content, chloride ion can inhibit the absorption of phosphorus by crops. Therefore, appropriate amount of phosphate fertilizer should be applied when applying chlorine-containing chemical fertilizer. The compound fertilizer and formula fertilizer composed of chlorine-containing fertilizer, urea, ammonium phosphate, calcium superphosphate and calcium magnesium phosphate fertilizer can not only reduce the harm of chloride ion, but also have the effect of balanced fertilization because of the combined use of nitrogen, phosphorus and potassium. The above is the planting network to introduce the application of chlorine-containing fertilizer, if you have a better supplement, please leave a message below to let us know.