Core Tip: Over the past few days, high temperatures have spread from east to west and from south to north across much of the country. The "brutal" weather conditions have affected the normal use of chemical fertilizers and pesticides. Fertilizers and pesticides have different effects due to the environment, especially in high temperature environments. If they are used improperly, they will not only have no effect, but also cause damage to crops. Therefore, in the hot season, it is very important to grasp the correct and reasonable usage of fats and drugs. Dry and dry, how to apply fertilizer properly? Phosphorus reduction and multi-application of phosphate fertilizer, phosphorus fertilizer on the one hand at a higher temperature can be more effectively used to produce a good fertilizer effect; the other hand, phosphate fertilizer can increase the utilization of soil moisture, play a mutually reinforcing role. In addition, sufficient phosphorus can increase the utilization of nitrogen and play a role in raising nitrogen by phosphorus. Reduce the amount of nitrogen fertilizers, especially carbon-ammonia that is easily decomposed by heat, because heat-decomposable carbon ammonia and high-concentration nitrogen fertilizers can easily cause crops to sprout. Reducing the amount of high-temperature and dry seasons, under the irradiation of strong light, the bare ground temperature can reach 50°C, the evaporation is intense, and the concentration of surface water solution increases sharply. At this time, if the same amount of fertilizer is applied under normal weather, the crop yield can not be maintained. Or increase production, and it is likely to reduce production. For example, when rainfall is moderate, maize yields 12 kg of pure nitrogen per acre, which may yield high yields. If the same amount of fertiliser is applied at high temperatures and drought, it will face the risk of reduced production. Fertilizing in the morning at the exact time, although the operator feels more comfortable, but with the rise of the sun, the temperature rises sharply, the water quickly evaporates, the crop absorption time is short, the fertilizer utilization rate is low; noon fertilization, due to high temperature, not It is beneficial to the absorption of fertilizers and personnel operations; in the evening, fertilization is suitable for people to operate, but also can make up for the shortcomings of short crop absorption time (because night is a process of decreasing temperature, evaporation of surface water is weakened, and water retention time is long), which is the best Fertilization time. High temperature diffuse, how to use pesticides rationally? Improve the utilization rate of pesticides When using pesticides in open-air crops, it should be suitable to wash with rainwater, and emulsifiable concentrates are appropriate. These pesticides have a longer residual time on the plant surface, while powders, water agents, etc. are relatively poor. In many crop types, there are villi or thick waxy layers on the surface of the leaves, such as corn, scallion, ginger, taro, and so on. Liquids on the fluff and waxy layers easily form droplets that cannot fully contact the surfaces of the plant leaves. Silicone and other additives are added to the medicament to enhance the effect of the medicament. Appropriately reduce the concentration of the pesticide The efficacy of most pesticides will increase with the temperature, the efficacy will also increase, so when the medication is used during the high temperature season, attention should be paid to reduce the dosage of the liquid, especially the hormone-like medicaments are especially noticeable, and the amount of medication is very easy to weigh Causes the occurrence of phytotoxicity. Therefore, it is necessary to reasonably adjust the concentration of the drug according to the temperature change. Note that when the spray quality crops are sprayed with pesticides, there is a limit to the amount of pesticide droplets that can be attached to the surface of the spray. When the spray volume exceeds a certain limit, the fine droplets on the leaves will condense into large droplets, which will fall and be lost. Instead, the amount of pesticide attached to the leaves is reduced. The spray method generally requires that the quality of the spray mist is evenly distributed and the coverage is high. It is advisable that the surface of the wet plant does not drip. This requires the sprayer to have a good atomization effect and reduce the waste of the liquid. Reasonable spraying to prevent poisoning Dispensing, pesticide application to prevent pesticides corroding the skin, the use of volatile pesticides must pay attention to the use of masks, at the same time, the prohibition of summer noon high temperature spraying pesticides, summer spray should be selected before 9 am or 4 pm Afterwards, avoid the occurrence of phytotoxicity. In addition, note that continuous application time should not be too long. colostomy pouch ostomy pouch stoma pouch urostomy pouch Wenzhou Celecare Medical Instruments Co.,Ltd , https://www.celecaremed.com