Canned Green Peas,Green Peas Canned,Green Peas Tin,Canned Green Peas Canned ZHANGZHOU TAN CO. LTD. , https://www.zztancan.com
There are three conditions for the occurrence of diseases, susceptible to susceptible vegetables, germs, and environmental conditions that are not suitable for growing vegetables. Therefore, the strategy to prevent vegetable diseases in greenhouses is not to prevent or eliminate these pathogens through drugs, or to increase the disease resistance of vegetables. The use of drugs can reduce the number of pathogenic bacteria and the chance of infestation of vegetables, but often cannot fully control the occurrence of diseases. Therefore, the best way to prevent vegetable diseases in greenhouses is to improve the disease resistance of vegetables and the correct use of pesticides.
The following measures need to be taken in production:
Fertilization has special emphasis on fertilization according to crop nutrient absorption, not subjective blind abuse. For example, every time cucumbers are picked, combined with watering and applying the appropriate amount of nitrogen fertilizer, the cucumber leaves and stems can be quickly supplemented with nitrogen nutrition, so that there is “strength†to continue photosynthesis to grow more cucumbers, but excess nitrogen fertilizer is often applied. The gluttony of cucumber stems and leaves will become “fat†and the photosynthetic rate will decrease, inhibiting the growth of roots. Those who are top-heavy and tender are more likely to invade germs. Therefore, when cultivating a period of chase fertilizer, one should not be too moderate in amount, so as to be digested; the other is to use with potash, organic fertilizer, etc., and the effect is better.
Watering skillful soil is composed of large and small soil particles, and between the soil particles is filled with water and gas. More water, less air, poor root breathing, root disease will also appear. Less water and more water will lead to waterless roots and drought problems. Therefore, there are three ways to look at watering in winter: See if the seedlings are really water-deficient; if you look at the ground, if the lyrics are right; if you look at the sky, whether it is suitable for watering. Water is poured around 10 o'clock in the morning on sunny days. Drip irrigation or water pouring under the membrane is used. After pouring, the air is properly dispersed and wet.
Uncovering all the things in the sky, the growth of the earth depends on the sun. The greenhouse vegetables should use the sun's light as much as possible. Only when the light has photosynthesis, can the yield be produced and the vegetables can grow healthily. Therefore, it is best to stick to the grasshoppers every day, especially when it is cloudy. In the morning, the best time to uncover the haystack is when the temperature in the shed has not been noticeably (1 degree) and can quickly rise after the grass is uncovered; in the evening, the temperature in the shed has not increased significantly ( At 1 degree), it is the best time to cover the grass.
Variable temperature management is more scientific. Every kind of vegetable and every growth period has its most suitable temperature. In production, adopting variable temperature control from morning till night during the day is more conducive to the healthy growth of vegetables. For example, for cucumbers, the temperature can be controlled by releasing air. In the morning, the temperature rises gradually to about 32°C from around 15°C after the unveiling of the haystacks in the morning, and the temperature begins to decrease at around 13:00 in the afternoon, gradually dropping to 20°C around 16:00, gradually dropping to midnight after covering the haystacks. : At 16 oC at 00 o'clock, it has dropped to a minimum of 13 oC in the early morning. The temperature on cloudy days decreases accordingly.
In the winter season, diseases of the greenhouse diseases must be addressed
In winter, the temperature drop will intensify, greenhouse vegetables will also usher in a "difficult era", this time of year, because of the low temperature caused by vegetables can not grow normally, frequently affected by disease, although three days or two or spray or smoke All kinds of drugs, but the efficacy is often not satisfactory. The basic reason is that the target has been ignored but the present - to improve the disease resistance of vegetables.