Misunderstanding one: fertilize more output and more
Many vegetable farmers fertilize large amounts of vegetables in greenhouses in order to produce more output. In fact, excessive fertilization of vegetables can easily cause fertilizer damage. Solution:
1. In the greenhouses planted after 3 years, chickens and cow dung are controlled within 2500 kg and chemical fertilizers are reduced by about 50%.
2. The large Salt concentration of the land, pay attention to the application of cow dung, humic acid fertilizer and EM bacterial fertilizer, in order to improve the soil carbon and nitrogen ratio, loose soil permeability, reduce salt and fertilizer.
3. Supplement boron, zinc and magnesium fertilizers to balance soil nutrients, reduce investment, and strive to create conditions for sustained high yields.
Misunderstanding 2: The high yield of seedlings
Many vegetable farmers tend to keep more when they leave seedlings, and think that seedlings can produce more. In fact, due to low winter temperatures, weak light, poor photosynthesis, and less carbohydrate synthesis, only a reasonable density can produce high yields. Solution:
1. It is better to use vegetables for wintering and picking vegetables.
2. In order to make full use of space, the management methods of early dense planting, medium-term sparse planting, and late-stage sparse branching can be adopted, and the total output and total efficiency can be improved by taking the leaf branches as non-congested.
Misunderstanding 3: High temperature grows faster
In fact, vegetables have the upper limit of temperature, generally 25-32°C. The temperature is too high, the respiration is great, the body is running, the physiological activity is disordered, the plants are long and the nutrition and reproductive growth are unbalanced, and the yield will fall instead. Solution:
1. Set up two vent outlets in the booth to cool down in time.
2. According to the temperature required for the growth period of various vegetables and the temperature of each organ during the growth period, management is required to prevent the growth of long-lived Vinegar and long fruit.
Misunderstanding 4: Plant growth is good
Most people think that vine growth is a good crop. In fact, water is leafy and the roots must be shallow, and undernutrition yields are low. Overgrowth of nutrients will inevitably affect reproductive growth, and yield will decrease. Solution:
1. Grasp the weak plant roots at the seedling stage, control the water control plants to promote roots, make the underground absorb photosynthetic products account for about 60%, in the middle and late underground and above ground absorption 50%.
2. In the early period, the consumption of nutrients in the plant body accounted for 60%, reproductive growth accounted for 40%, medium stage accounted for 50%, late stage reproductive growth accounted for 60%-70%, and vegetative growth accounted for only 30% to 40%, ie guaranteeing a certain period in the early stage. Assimilate the leaf area, control the growth and promote the fruit in the later period, and increase the yield.
Misunderstanding 5: fight drugs less
Many vegetable farmers fight drugs once every 2 to 3 days in the middle and late stages of growing vegetables. They believe that drugs can be used to prevent the spread of diseases. Solution:
1. Look for the disease, spray the disease symptomaticly. The best choice is to contain copper and zinc. This will not only kill bacteria, but also enhance the ability of the plants to resist the invasion of germs, and it will also promote crop growth.
2. To improve the ecological environment, prosperous, poor ventilation, and the effect of drug fight every day is not good, it should be cool leaves.
3. For the death caused by soil bacteria, should pay attention to medication prevention at the seedling stage. If the source of the disease is neglected, the disease is found at the seedling stage, and after the onset of the disease, the pathogen has invaded the plant body, and the effect of fighting drugs is not good.
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