A ï¹‘ nursery selection and preparation
The nursery should choose soil loose and fertile, convenient for irrigation and drainage, and the plots of strawberries that have not been planted. It is most ideal for mountain seedlings far away from the strawberry production field. The plots that have been bred with strawberry seedlings must first be soil disinfected. After the selection of nursery plots, apply sufficient base fertilizer, apply more than 2000 kg of organic fertilizer per acre, and apply 25 kg of compound fertilizer with 45% nitrogen, phosphorus and potassium, then plow tillage, soil preparation, and alfalfa. The width of the surface is about 1.2 meters. The deep trenches are opened around the seedlings to facilitate irrigation and drainage. The trenches are connected, requiring smooth drainage and no water accumulation after the rain stops. At the end of the tanning, the kneading surface can be sprayed with 50% butachlor 300 times to prevent weeds.
Second, the variety and the mother plant selection and planting seedlings
The selection of varieties should be based on the dominant varieties cultivated in the city, such as red cheeks. It is also possible to allocate some varieties of local marketable products according to the needs of growing strawberries in different places. The seedling mother plants are selected from the detoxified original seedlings or the first generation seedlings, and the production plants are not recommended as the seedling mother plants. The planting time of the seedlings of the seedlings is suitable from the middle to the middle of March-April, and transplanted with soil. It can be planted in the middle row of the two rows or the middle of the dragonfly. The plant spacing is 60-80 cm, and the planting is generally 500-800. .
Third, the management of the mother plant after planting
After the fertilizer and water management seedlings are planted, the manure is applied to the manure to promote the survival of the mother plant. In the future, the soil must be kept moist to promote the stems. Dilute manure or 0.3% urea is applied every 15 to 20 days. For the red cheek strawberry varieties to be fertilized, the â€œpre-promotion and post-controlâ€ measures are implemented. From April to June, the main stage of seedling breeding is carried out. The fertilizer should be applied in an appropriate amount. After July, the growth of the seedlings should be controlled, and the fertilizer should be applied as little or as little as possible. . Should not apply too much nitrogen fertilizer to cause long-lasting raspberry seedlings. During the rainy season, it is necessary to pay attention to drainage and flood control. In the hot and dry season from July to August, it is necessary to resist high temperature and drought to protect the seedlings.
After the plant is managed and planted, the stems and old leaves are removed in time, and the stolons are removed after the stems are extracted. Timely loosening the soil and weeding. When the grass is plucked, be careful not to float the seedlings. When there is no root seedling, it should be replanted in time.
4. Pest Control
The main pests and diseases during strawberry seedling are: aphids, red spiders, Spodoptera litura, powdery mildew, anthracnose, yellow (wild) wilt and so on. Focus on the prevention and treatment of anthrax.
Aphids: When the disease occurs, the agent can be selected from 2500 to 3000 times of 10% imidacloprid wettable powder, or 2500 times of 1% avermectin wettable powder.
Red spider: In the initial stage of prevention and treatment, the agent can use 20% of the endangered suspension agent 4000 times solution, or 57% of the acetylene emulsifiable concentrate 2500 times solution. In the prevention and control, 99% chlorophyll 300 times solution is better.
Spodoptera litura: control should be carried out after the occurrence of the hazard in June. The control method is preferably a sexual trap, one per acre; or 0.2% Fuda-only emulsifiable concentrate 1500 times, or 1% avermectin wettability Powder 2500 times solution, or 48% lesbian emulsifiable oil 800 times solution, or 40% chlorpyrifos emulsifiable concentrate 1000 times solution, or 5.7% Baishu emulsifiable concentrate 800 times solution.
Powdery mildew: 5 to 6 months is the peak period of onset, and the initial onset period is timely controlled. Timely clean up the susceptible parts of the plant, 30% Cuize Suspension 1500 times solution, or 50% Tsuibei Water Dispersion Granule 3000 times, or 25% Ethylpyrene Water Suspension 800 times solution.
Anthrax: May-June is the susceptible period of the plant, and August-September is the peak incidence. The prevention and control methods are: (1) avoiding continuous cropping (2) strict soil disinfection (3) "Mei Ji" scaffolding to cover rain, change flood irrigation to micro sprinkler irrigation; use sunshade net protection during high temperature in summer (4) chemical control, cleaning up After the susceptible part of the plant, use 75% tebuconazole, trifloxystrobin (take the enemy) water dispersible granules 3000 times solution, or 25% Kairun oil 1500 times solution, 43% tebuconazole (Haoli) suspension 4000 times or 25% of the agent makes 1000 times of 100 grams, or 60% of Baitai water dispersible granules 800 times liquid spray control.
Yellow (wild) wilting: It is strictly forbidden to use susceptible plants as seedlings for breeding; avoid the soil of the seedlings to be too dry or too wet; when the diseased plants are found, they are promptly removed and the prevention and control are prolonged.
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The trace element additive is an additive which constitutes a raw material of a trace element additive, and is not an element such as iron element, copper element or manganese element, but a compound containing a trace element such as ferrous sulfate, Copper Sulfate or the like. Some countries collectively refer to these compounds as trace element salts.
Trace elements are essential nutrients for animal survival. Although they are low in animal and feed, they are important for the growth and health of livestock and poultry. So far, trace element nutrition has experienced four stages of development: Inorganic Salts, simple organic compounds and trace element amino acid chelate and slow release trace elements. Compared with the former two, trace element amino acid chelate is more easily absorbed by the body, has higher bioavailability, and has the advantages of preventing disease, resisting stress, improving nutrient utilization and improving reproductive performance of livestock and poultry. Special effects, but the price is more expensive, the use is limited, and the slow release of trace elements has good effect, low dosage and low cost, which will be an important development direction of trace element additives in the future.
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