The key link of growing vegetables in summer

Key One: Temperature

Temperature is the key to the growth of vegetables. High temperature, especially high night temperature, can easily cause vegetables to flourish. Therefore, regulating temperature is one of the key technical points for cultivating strong vegetables.

For summer vegetables, because their growth is in a high temperature period, the temperature in the shed often exceeds 40°C, which affects the normal growth of vegetables, which requires vegetable farmers to regulate in time. In addition to increasing ventilation, attention should also be paid to the application of shading and cooling facilities such as shading nets and cooling agents to maximize the temperature difference between day and night to prevent the growth of vegetables. In general, the temperature of solanaceous fruits and vegetables should be controlled at 25℃-30℃ during the day and 15℃-16℃ at night; melon vegetables should be controlled at 25℃-32℃ and 15℃-18℃ at night. .

Generally speaking, when the temperature in the shed exceeds 35℃, a shading net should be installed on the roof to cool down. Pay attention to the coverage time of the shading net from 11 am to 2 pm. Avoid all-day coverage, so as not to affect the normal photosynthesis of vegetables. . When the night temperature is higher than 18℃, the method of strengthening night ventilation (ventilation at the front face + ventilation at the top) should be adopted to reduce the temperature, and the temperature difference between day and night should be kept at about 15℃. After doing enough work, if the temperature in the shed remains high and does not drop, spray water or small water can be used to assist in cooling down.

Key two: moisture

The moisture should be controlled well. The key point of using water to promote roots and control water and prevent diseases is to control water.

Soil moisture is an essential ecological factor for vegetable growth. However, if you water too much and overtime, the vegetables will grow prosperously, which is not conducive to the cultivation of strong trees. Therefore, the amount of watering and the frequency of watering can be appropriately controlled during production to create the most suitable soil moisture environment for vegetables.

Generally speaking, summer vegetables should pay attention to the combination of large water and small water, which can not only meet the water needed for vegetable growth, but also reduce the temperature of the shed. But do not water when the temperature is high at noon. Generally, you should choose to do it before 10 am and after 4 pm, especially for some leafy vegetables, because the main job of leafy vegetables is to preserve the leaves. If you water it close to noon, the leaves will suddenly roll up in the afternoon, and the edges of individual leaves will be burned and lose their commerciality.

Of course, watering should be carried out according to the water demand characteristics of different vegetables. For example, the transpiration of melon stems and leaves is large, and the water demand is also large. The watering frequency can be appropriately increased to ensure that the soil moisture is 70%-80%. In addition, some vegetables like wetness but are afraid of drought and waterlogging (such as peppers). After planting slow seedlings, water control and hoeing can be used to ensure soil moisture and control plant growth. Do not water too often to prevent suffocation of the root system or excessive plant growth. Also, pay attention to watering, except for planting water and slow seedling water, which can be watered with large water, and all other watering should be watered with small water.

Key Three: Nutrients

Nutrients (ie fertilizers) should be well matched. The key point is how to use fertilizer to change soil with fertilizer and grow roots with fertilizer.

Vegetables are cultivated in summer, and the ground temperature is high. Vegetable farmers do not use ridged planting, but mostly use flat border cultivation. Flat border cultivation has poor air permeability, which is not conducive to root growth. In order to solve this problem, biological bacterial fertilizer can be applied to the holes during flat-border cultivation to make full use of the effects of biological bacterial fertilizer to improve soil fertile soil, promote roots and nourish roots, cultivate strong trees, and improve the plant's disease resistance and stress resistance.

In addition, for plants that grow too weak, spray chitin and flushing with biological fertilizer can be used to promote the growth of the trees. Foliar fertilizer can also be sprayed, of course, a single trace element fertilizer can also be sprayed. For example, after the slow seedling of vegetables and before flowering, zinc-containing leaf fertilizer can be sprayed, which can not only prevent yellowing of the top leaves, but also help Enhance plant resistance to viral diseases. In addition, one week before vegetables bloom, choose to spray 1500 times poly-boron solution to promote the differentiation of flower buds.

Key four: disease prevention

Diseases should be prevented. Set up anti-insect nets and spray pesticides early to prevent the key points from being cured. For over-summer vegetables, due to adverse environmental conditions such as high temperature and humidity, the occurrence of diseases and insect pests is more serious, so early prevention and treatment are required. Generally, pests invade from the air outlet of the shed. Therefore, in order to reduce the occurrence of pests in the shed, it is necessary to install anti-insect nets at the upper and lower air outlets of the shed. The size of the anti-insect net is generally about 40 meshes to prevent the infiltration of various pests. If the protection is improper and the pests have sneaked into the shed, you can hang a yellow board in the shed to trap and kill it or use 3% acetamiprid 1500 times mixed with 10% imidacloprid wettable powder 2000 times to control, the effect is better.

In addition, after the over-summer vegetables are planted, epidemic diseases, viral diseases, bacterial leaf spot, etc. often occur, and medicines can be sprayed to protect them before the diseases occur. For example, epidemic diseases can be controlled with 77.2% Pulique liquid 600 times liquid; virus diseases can be controlled with 500 times virus A mixed with Ningnanmycin 300 times liquid; bacterial leaf spot can be prevented with 47% Garinong wettable powder 600 times liquid , Can effectively control the development of diseases. In addition, in the past two years, the dead trees of peppers and cucumbers have been more serious after planting. It is recommended to irrigate the roots with the method of Prik + Jinlei + Fuxing. The second irrigation is 7-10 days later and the third after 15 days. The control effect is good. .

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 processing. phone

Freeze-Dried RT-PCR Test Reagent Kit Of COVID-19(ORF1ab,N)

The Freeze-Dried RT-PCR Test Reagent Kit is a real-time reverse transcriptase (RT)-PCR test intended for the qualitative detection of nucleic acid from SARS-CoV-2 in nasopharyngeal swabs, oropharyngeal (throat) swabs, anterior nasal swabs, mid-turbinate nasal swabs, nasal aspirates, nasal washes, bronchoalveolar lavage (BAL) fluid and sputum from individuals suspected of COVID-19 by their healthcare provider. Results are for the identification of SARS-CoV-2 RNA. The SARS-CoV-2 RNA is generally detectable in respiratory specimens during the acute phase of infection.

Positive results are indicative of the presence of SARS-CoV-2 RNA; clinical correlation with patient history and other diagnostic information is necessary to determine patient infection status. The agent detected may not be the definite cause of disease. Positive results do not rule out bacterial infection or co-infection with other viruses.

Negative results do not preclude SARS-CoV-2 infection and should not be used as the sole basis for patient management decisions. Negative results must be combined with clinical observations, patient history, and epidemiological information.

Novel coronavirus detection reagent,Novel coronavirus testing reagent,Novel coronavirus test reagent,Freeze-Dried PCR Test Reagent,freeze-dried RT-PCR reagent

Shenzhen Uni-medica Technology Co.,Ltd , https://www.nbunimed-global.com