Entering August, autumn delays vegetables entering the peak period of planting. Before and after the seedlings were planted, it was in the hottest period of the dog's day. The walls of the greenhouse store heat and the film is insulated. The temperature is much higher than the outside world whether it is day or night. The temperature is high, and the north is in the flood season, there are many cloudy and rainy days, and the sunshade nets are used for a long time on sunny days. It is easy to cause high temperature and low light environment in the shed, which seriously affects the normal growth of vegetables, and problems such as weak seedlings, poor flower bud differentiation, leaf curling, etc. . To solve the problem of weak seedlings, we must start from the basics. Improve facility conditions and create a good environment High temperature in summer, especially high night temperature and high consumption of organic nutrients, are important factors that cause weak trees. On the basis of good ventilation and cooling, it is necessary to rationally use sunshade nets, spray water and other auxiliary cooling, which will help improve the conditions of the shed and increase the growth of vegetables. The use time of the sunshade net should not exceed 4 hours, and when choosing a sunshade net with a shading rate below 60%, avoid too weak light in the shed. Water spraying is an important method to reduce the temperature of the shed. In addition to spraying to cool the temperature during the highest temperature in the shed around noon, spray water in the evening to reduce the temperature at night, widen the temperature difference between day and night, and avoid excessive night temperature, resulting in excessive consumption of organic nutrients Big. Do a good job in seedling management and lay the foundation for strong trees Weak trees usually start from the seedling stage, and weaker trees in the seedling stage are weaker throughout the growth period. You can start with the following aspects to lay a solid foundation. One is to grasp the key points of planting. Before and after planting, the environment of the seedlings changes drastically, and the root system is damaged, which creates opportunities for pathogen infection and affects the later growth and development. Summer planting*** Choose the afternoon, watering in advance to create moisture to avoid high ground temperature, which helps to slow down the seedlings quickly. The planting depth of seedlings should also be appropriate, the ridged planting can be slightly deeper, and the soil should be about 1 cm, and the border planting should be shallow. The second is to do a good job of water and fertilizer management during the seedling period. Seedling management should pay attention to more hoeing, late mulching, arching and mulching in the rows, covering straws between rows to improve soil permeability and ensure a good soil environment, thereby promoting deep rooting and cultivating strong plants. Biological bacteria fertilizer and functional fertilizers such as alginic acid and chitin have a good effect on promoting root growth and improving weak seedlings. Vegetable farmers can start with slow seedling water and apply functional fertilizers to promote rapid slowing of seedlings and cultivate strong trees. Promote bottom to raise, cultivate strong trees Once the seedlings are found to be weak, it is necessary to take timely countermeasures to cultivate strong trees. The following measures can be adopted: First, supplement nutrition to promote rooting. High-quality calcium fertilizer, biological bacteria fertilizer, etc. should be applied in time to maintain root system, improve absorption capacity, supplement nutrients, and improve growth. The second is to pay attention to maintaining the leaves. It can be sprayed with 500 times of chitosan, 300 times of total nutrient foliar fertilizer, 200 times of glucose, 1000 times of amino acid or nucleotide foliar fertilizer, to supplement nutrients, improve leaf resistance and increase nutrient accumulation. The third is to pick melons to reduce nutrient consumption. The large melons are removed in time, and the female flowers are suspended from dipping the melons to reduce nutrient consumption and promote rapid plant recovery. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for handling. phone Hotel Safe Box,Password Hotel Safe Box,Hotel Electronic Safe Box,Safe Box Hotel Room Hebei Yingbo Safe Boxes Co.,Ltd , https://www.ybsafebox.com