Misunderstanding 1: Fertilization is more, and many farmers produce more fertilizer in greenhouses in order to produce more output. In fact, the total salt content required for normal vegetable growth is 200010-6 to 300010-6, and more than 650010-6 roots will die due to reverse osmosis, and the yield must decline. In particular, high temperatures and high humidity in greenhouses, decomposition of organic fertilizers quickly, large amount of nitrogen evaporation, excessive fertilizer can easily cause fertilizer damage. Solution: First, greenhouses with vegetables for more than 3 years, chicken manure and cow dung are controlled within 2,500 kg, and chemical fertilizers are reduced by about 50%. Second, 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 reduce fertilizer. The third is supplementing boron, zinc, and magnesium fertilizers to balance soil nutrients and create conditions for reducing investment and striving for sustained high yields.
Myth #2: Leaving more seedlings, higher yields Many vegetable farmers are reluctant to go seedlings when they are left to plant seedlings, and think that seedlings can produce more. In fact, due to the low winter temperatures, weak light, poor photosynthesis, and low carbohydrate synthesis, only sparse crops can produce high yields. The solution: First, it is better to use wintering and boring vegetables as a reasonable and sparse plant. Second, in order to make full use of space, the management measures for early-stage close planting, medium-term sparse planting, and late-stage planting can be adopted, and the total output and total efficiency can be increased by taking the leaves as the minimum.
Misunderstanding 3: High temperatures, growing fast Many vegetable farmers believe that the purpose of building a greenhouse is to keep warm, and vegetables with high temperatures will grow faster. In fact, vegetables have the upper limit of temperature, generally 25 Â°C ~ 32 Â°C. If the temperature is too high, the respiration of the plant is large, the body's operation and physiological activities are disordered, the plants are long and the dendrite and reproductive growth are not balanced, and the yield will fall instead. Solution: First, set up two vents in the greenhouse and cool down in time. The second is strictly in accordance with the temperature required for the growth of various vegetables and the temperature requirements of various organs during the growth period, to prevent the growth of long-grass is not long fruit.
Misunderstanding 4: The vines grow, the growth is good, most people think that planting vines are good crops, in fact, more than Yewang root must be shallow, low nutrient output, excessive growth of nutrients will inevitably affect reproductive growth, yield but reduced. Solution: First, grasp the deep roots of weak plants at the seedling stage, and control the water-controlling plants to promote roots, so that the underground part absorbs about 60% of the photosynthetic products, and the underground and above-ground absorption each account for about 50% in the middle and later periods. Second, the former consumption of nutrients accounted for about 60%, reproductive growth accounted for about 40%; each accounted for about 50% in the medium term; later reproductive growth accounted for 60% to 70%, and vegetative growth accounted for only 30% to 40%. There is a certain amount of assimilation leaf area, and the control of vines and fruits will increase the yield.
Myth 5: fight drugs, less disease, many farmers in the vegetable growth in the late period of 2 to 3 days to fight 1 drug, that drugs can be used to prevent the spread of the disease, the result is not the case. Solution: First, look for diseases, symptomatic spraying, the best choice of copper-containing agents, zinc-containing agents, both bactericidal, but also enhance the ability of plants to resist invasion of bacteria, but also promote crop growth. The second is to improve the ecological environment, luxuriant foliage, poor ventilation, even if the fight drugs every day, the effect is not good, should leaf cooling. The third is the death caused by soil bacteria, should pay attention to drug prevention at the seedling stage. If the source of the disease is neglected, the disease at the seedling stage, and the late stages of attack, the pathogen has invaded the plant body, even if the effect of fighting drugs is not good.
Misunderstanding 6: Many trips, more income, many people believe that investing in the construction of greenhouses cannot allow the land to be idle, so the deputy deceased with the main deputy, the deputy deputy deputy deputy deputy deputy deceased, planting more times, but the result is poor, and the effectiveness is low. The solution: First, it is better to go through the winter, one year is a good one, and the spring and autumn is better. Eggplant, peppers, tomatoes and cucumbers can be used to regenerate old plants at low prices. The second is to leave the country for a period of time each year to deepen the rain and salt, sterilize through the sun, extinguish the insects in the shed, and ripen the soil.
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