Roots of greenhouse vegetable seedlings is a physiological disease, mostly caused by improper management. At the time of initial infection, rust appeared in the roots. In severe cases, the roots were rotted, and no new roots were found. The seedlings turned yellow and wilted, and all of them died later. Regarding how to deal with the problem of greenhouse vegetable rooting, the author has provided relevant reference for the relevant treatment methods for the majority of vegetable farmers to encounter this problem, and at the same time, it can prevent it in advance and prevent it from happening.
Maintain a proper temperature and bed soil preparation should be reasonable, after sowing to ensure adequate soil temperature. In case of rainy days and insufficient light, warming and heat preservation measures should be taken. Early spring nursery seedlings (rooms) in the best use of electric hotbed for nursery to facilitate insulation.
When the humidity is reduced in time in nurseries in greenhouses or greenhouses, the seedbeds are generally not exposed to drought (the topsoil is not held in groups) and should not be watered. Watering or no watering should be minimized; the amount of watering during obvious droughts should not be excessive. Big. Seedlings do Ning Gan not wet, if the seedbed is too dry, it can cover moist fine soil, this will not only alleviate the seedlings' need for water, but also reduce the air humidity in the seedbed, the bed humidity is too high, can cover hay ash, It is also possible to conduct proper ventilation and dehumidification at high noon temperatures.
Pay attention to the increase of light before raising seedlings, to choose a well-lighted place to build a seedbed. This is conducive to the seedlings robust growth and development, enhance their resistance to disease, reduce the emergence or spread of roots in vegetable seedlings.
To apply sufficient farmyard fertilizer for vegetable seedlings, it is necessary to increase farmyard manure, especially hot manure, to cultivate fertility, cultivate strong seedlings, increase disease resistance of vegetable seedlings, increase ground temperature, and reduce disease occurrence. The specific approach is: Before vegetable seedlings, fully cooked hot farmyard manure was mixed with bed soil. However, it must use decomposed hot farmyard fertilizers, otherwise it will cause burning roots.
Timely ventilation After the cotyledons are unfolded, choose clear and warm weather to open the cover for ventilation, and evenly spread a layer of fine dry soil to the seedbed and then cover the cover tightly. This will not only reduce the humidity of the bed soil, but also increase the temperature. effect.
Cooling Agent, is a general term for all the chemicals that can produce cooling effects and are not strong. The most common Cooling Agent is menthol (especially L-menthol), but it should not be used in large quantities due to its strong odor and strong irritation to the skin, mucous tissue, and eyes. Therefore, many scientists have synthesized and extracted a new generation of cooling agent.
WS-23,flavor,Menthol,WS-5,Koolada,WS-12
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