Affected by the cold wave, most parts of China last week cooled strongly in the past few days. In the first two days, the temperature in the northern region began to rise slowly. There are many precautions during busy spring ploughing. Xiaobian sums up the three techniques of watermelon seedling transplanting, eggplant tree fruit fertilization pay attention to balance soil, corn base fertilizer, pay attention to the application of farmyard manure, pear tree to prevent and control black star disease... hope for the majority of planting users Helpful.
Crop: Watermelon
Location: Changde City, Hunan Province
Early warning: three tips for moving seedlings
As the weather gradually warms up, many farmers have planted watermelons, mostly in greenhouses, and there are some precautions to be vigilant before and after transplanting.
Base fertilizer: Apply fertilizer at about three days before transplanting. You can choose potassium sulphate compound fertilizer, and apply 30~50 kg per mu combined with soil preparation.
Transplanting: During the process of transplanting seedlings, attention should be paid to adjusting the humidity and temperature of the greenhouse. The humidity is controlled at 50% or more. The temperature can be transplanted at 15~18°C in the evening and 25~32°C in the daytime. When transplanting, pay attention to the seedlings should not be in direct contact with the fertilizer. After transplanting, the planting water is poured once, depending on the situation, it is not necessary to water more.
Post-plant management: After the seedlings are transplanted, attention should be paid to the control of aphids. Once the seedlings are present, 4% imidacloprid can be used, and the spray is diluted 2000 times.
Crop: Eggplant Tree
Location: Tai'an County, Liaoning Province
Early warning: fertilization pay attention to balance soil during the fruiting period
The gold straw hat expert will let the introduction, the local planting of eggplant trees in greenhouses for a large area, planting history has been more than 10 years.
At present, the eggplant tree is in the fruiting stage, and the continuous result of eggplant will last until July of this year. Each time the fruit is placed, it must be applied with high-nitrogen, high-potassium and low-phosphorus water-soluble fertilizer. Sulfur-based compound fertilizer (nitrogen, phosphorus and potassium content of 20%-20%-20%, respectively) alleviates the soil. During the day, the temperature of the greenhouse is controlled below 32 °C, and it is appropriate to be around 28 °C. Depending on the soil conditions, water should be poured every ten days or so.
Links: Eggplant trees are imported from abroad and grow vigorously. The plant height is 2-3 meters (up to 5 meters), the degree of development is large, the flower buds are small, and the leaves are medium in size. Stingless, continuous fruit set super strong; fast growth, good branching, fruit-shaped elliptical long column, the appearance of purple and shiny. The eggplant is about 25-30 cm long and 6-8 cm in diameter; the single eggplant weighs 400--450 g.
The commodity is good, the texture is smooth and oily, the green, green and the big ones are thick; the skin is thin and fleshy, the meat is fine, can be eaten raw, the taste is delicious, the shelf life is long, the storage is resistant and the commercial price is extremely high. The variety has strong disease resistance, good cold resistance, and outstanding fruit setting ability under low temperature conditions. It has wide adaptability and no choice for soil.
Crop: Corn
Location: Sichuan Province
Early warning: pay attention to the application of farmyard manure
Spring maize should be based on the basic principle of base fertilizer as the supplement, farmyard manure as the main fertilizer, nitrogen fertilizer as the main supplement, and spike fertilizer as the main principle of fertilization.
At present, spring corn has more base fertilizers, and base fertilizers should account for about 70% of total fertilization. Most of the phosphate fertilizers should also be combined with base fertilizers, usually combined with autumn tillage in the previous year. When applying the base fertilizer, it should be evenly mixed with the soil. If nitrogen fertilizer is used as the base fertilizer, it must be applied deep to prevent nitrogen loss. In the phosphorus-deficient soil, 450-600 kg of fertilized calcium per hectare; in the potassium-deficient soil, 150 kg of potassium chloride per hectare; in the zinc-deficient soil, 15 kg of zinc sulphate per hectare is applied.
Before the spring sowing, use a small amount of farmyard manure with a suitable amount of nitrogen, phosphate fertilizer or acupoint application as corn seed fertilizer.
Crop: pear tree
Location: Shaanxi Province
Early warning: prevention of black spot disease
In the spring, extensive management can lead to pear disease, and pear tree scab will cause mildew and premature fallout. So how to prevent pear tree scab?
Cutting off the diseased shoots at the initial stage of the diseased shoots, in order to prevent the spread of the germs, reduce the re-infection, and continuously cut off the diseased shoots can play a role.
The spray squeegee sprays 3 to 5 waves of sulphur sulphur or 150 times of liquid Solybar in the whole germination stage, or 800 to 1000 times of liquid 40% DuPont Fuxing emulsifiable concentrate, or 5% to 7% of urea solution. A 0.1% to 0.2% solution of dexamethasone is added to eradicate the bacteria that overwinter in the bud scale.
Protect the new shoots to protect the new shoots and young fruit, spray 800 times liquid green milk copper emulsifiable oil during the flowering new shoots, or 800-1000 times liquid 80% big raw M-45, or 600 times liquid 70% Dyson Protective agents such as manganese-zinc wettable powder can reduce the onset of disease. If there are already damaged new shoots at this time, spray 1 to 2 times 800 to 1000 times of liquid 40% DuPont Fuxing emulsifiable concentrate, or 1500 times of liquid 5% Anfu suspension and other therapeutic agents with better osmotic effect. Will play a good therapeutic role.
The breeding of bagging bacteria has a great relationship with the amount of rain. After the rain, it is necessary to use a drug with better internal absorption and osmosis. When the air is dry, a protective agent is used. After the young fruit is sprayed with the medicament to eliminate the sterilization, the selection of the young fruit bag can play a better protective role.
This article URL: Crop fertilization and pest control techniques after cold wave
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