Spraying less disease less
Many vegetable farmers in the late growth period of vegetables, sprayed once every 2 to 4 days, that the drug hit hard, spray more to prevent the spread of the disease.
The preventive measures are:
1. To identify the cause, the right medicine, it is best to choose to contain copper, zinc, both bactericidal, but also enhance the ability of plants to resist invasion of bacteria, but also promote crop growth.
2. To improve the growth environment, many strains of high density, high humidity, luxuriant foliage, poor ventilation, the effect of drug every day is not good, should be leaf cooling.
3. For the death caused by soil bacteria, should pay attention to medication prevention at the seedling stage. If you ignore the source of disease, disease at the seedling stage, late attack, the bacteria have invaded the plant body, and the effect of the fight drugs is not good, so we must pay attention to the timely removal of diseased plant residues, cut off the infection cycle.
Fertility grows faster
Many vegetable farmers often mistakenly believe that large amounts of fertilizer can increase the yield of vegetables. In fact, the total soil salt concentration required for the normal growth of vegetables is 2000-3000 mg/kg, and more than 6500 mg/kg root system will have reverse osmosis and die, and the yield will naturally decline or grow poorly. Excessive application of fertilizer also causes undesirable physical and chemical phenomena such as salinization of the land and soil compaction, and it also reduces the quality of the vegetables. In particular, greenhouses have high temperatures and high humidity, organic fertilizers decompose rapidly, and phosphorus availability is 2 to 3 times higher than exposed land. The amount of nitrogen volatilization is large, excessive fertilizer can easily cause fertilizer damage.
The preventive measures are:
1. For greenhouses that have been planted for more than three years, chicken and manure are controlled within 2,500 kilograms, 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 bacteria fertilizer, in order to improve the soil carbon and nitrogen ratio, loose soil permeability, reduce salt and fertilizer.
3. Supplement with boron, zinc, and magnesium to balance soil nutrients and create conditions for lowering input and striving for sustained high yields.
High yield of young seedlings
Many vegetable growers want to keep a few more plants when planting seedlings. In fact, due to the low winter temperatures, weak light, poor photosynthesis, and low carbohydrate synthesis, only a reasonable amount of planting can produce high yields. The preventive measures are:
1. It is better to use vegetables for wintering and picking vegetables.
2. In order to make full use of space, early-stage close planting, medium-term sparse planting, and late-stage management can be adopted to minimize crowding of leaves to increase total output and total efficiency.
3. When planting vegetables, some high-tech cultivation techniques can be used, such as soilless cultivation, three-dimensional cultivation, and mist cultivation, which can make relatively better use of greenhouse space. In addition, according to the growth requirements of different vegetables, it is timely to supplement the external growth conditions needed to meet the growth needs of vegetables.
High temperature grows faster
Many vegetable farmers believe that the purpose of building greenhouses is to keep warm, and the high temperature vegetables grow faster. In fact, vegetables have the upper limit of the temperature, generally 25 °C ~ 32 °C. The temperature is too high, the respiration is great, the body is running, the physiological activity is disordered, the length of the plants is long, the vines and reproductive growth are unbalanced, and the yield will be decreased. The preventive measures are:
1. Two vent outlets in the greenhouse are set to cool down in time. 2. In strict accordance with the temperature required for the growth of various vegetables and the temperature of each organ during the growth period required temperature management to prevent long-term growth is not a long fruit.
3. The phenomenon of sudden cooling must be avoided in production. Especially in the vegetable seedling stage, it is forbidden to sweep the wind and the hallway.
Plant growth is good
Most people think that crops are a good crop. In fact, many leafy roots must be light, low yield of nutrients, excessive growth of nutrients will inevitably affect reproductive growth, and production will be reduced. The preventive measures are:
1. In the seedling stage, we should grasp the deep roots of weak plants and water control plants to promote roots, that is, “seedlingsâ€, so that about 60% of photosynthetic products are absorbed in the underground, and 50% of underground and aboveground absorption are in the middle and late stages.
2. In the early period, the consumption of nutrients in the body is 60%, reproductive growth is 40%, each in the middle stage is 50%, in the latter stage, reproductive growth is 60% to 70%, and vegetative growth is only 30% to 40%. Assimilate the leaf area, control the growth and promote the fruit in the later period, and increase the yield.
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