Fertilizer harm to the soil single application of a chemical fertilizer or excessive application of chemical fertilizers, commodity organic fertilizer, resulting in excessive concentration of soil solution, resulting in reverse osmosis, resulting in the inhibition of vegetable root development, plant wilting or coked leaves, there is a lack of disease. One of the phytotoxicity is dominant phytotoxicity and the symptoms are obvious; the second is hidden phytotoxicity, and the symptoms are latent or delayed to the lower jaw. After the injury occurs, the leaves of the vegetables lose their green or produce spotted spots, perforation, falling leaves, falling flowers, falling fruit, or even the whole plant withering. There are four causes of harm. One is that the pesticide species is not in the right direction or misuse of herbicides; the second is the excessive application of pesticides; the third is the purchase of inferior pesticides; and the fourth is the use of pesticides in high temperature seasons. Drought and drought are not only affecting the sowing of vegetables and seedlings, but also affect the growth and development of vegetables, and make it difficult to apply drugs. There are three causes of harm. First, improper site selection and lack of water sources; Second, poor water quality; Third, ditches, irrigation and drainage facilities are not matched, and water is difficult to draw. Harmful damage means that the same or similar vegetables of the same or similar kinds are grown in the same shed, and the yield and quality are reduced year by year. There are three causes of harm. First, the same or similar vegetables prefer a certain kind of nutrient elements, and such elements are not timely supplemented; Second, the accumulation of soil pathogens causes disease; Third, root exudates lead to imbalance of soil microbial community structure and soil aging. There are four countermeasures. Before selecting a suitable site to improve the location of the water system supporting greenhouses, full consideration should be given to whether there are sufficient and excellent sources of water. To open a ditch, easy to divert water, drainage. Wherever conditions permit, one faucet can be installed in each greenhouse, and sprinkler facilities can be used in high standards. Reasonable fertilization promotes healthy vegetables. Firstly, it is necessary to apply adequately cooked farmhouses to accumulate organic manure all year round; second, to use refined high-energy commodity organic fertilizers, bio-organic fertilizers, and bio-organic compound fertilizers; and third, to modify nitrogen and phosphorus fertilizers to reduce nitrogen. Stabilize the phosphorus, increase potassium, and apply micronutrients; fourth, fertilize in appropriate amounts; and fifth, apply 800ml of 0.01% baitrin (brassica lactone) or red clover (microbial fungicides) once fertilizer damage occurs. Liquid 2 to 3 times. Scientific use of drugs to ensure the safety of vegetables First, when a minor injury occurs, fertilizer and water management can be strengthened to restore the normal growth of vegetables; Second, the use of pesticides, especially herbicides, should be used with caution; Third, the dose and concentration of good pesticides should be avoided. Repeated application of a pesticide; four is not allowed to mix pesticides; five is to avoid high temperatures; six herbicide applied equipment can be reused after cleaning. Rotation of crop rotation to adjust the cultivation environment First, eggplant, tomato, melons and other susceptible vegetables, to change planting varieties in different seasons or seasons; Second, prone to disturbances in greenhouses to increase the application of organic fertilizer to improve the soil; The soil retting agent inhibits the bacteria; the fourth is the lack of nutrients in response to the lack of soil. Best Neck Massager,Shiatsu Neck Massager,Neck Relax Massager,Best Massage For Neck Pain Shenzhen Jie Zhong Lian Investment Co., Ltd. , https://www.szmeizonscares.com
The Common Physiological Obstacles and Prevention of Greenhouse Vegetables
Air harm ammonia easily enters from stomata and water holes in the leaves of vegetables and causes alkaline harm in the plants. The leaves of the victim crops were initially immersed in water and gradually turned to light brown. The young shoots or growth points were atrophic and black. When the leaves were severe, they were scorched and the whole plant died of physiological water loss. There are four causes of harm. First, the application of inadequate decomposing manure; the second is fermented cake fertilizer or chicken manure in the greenhouse; Third, fertilization when spreading fertilizer on the ground; Fourth, uneven fertilization, such as the sudden encounter high temperature weather, easy to concentrate induced ammonia damage.