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How to fertilize rice? Mastering scientific fertilization methods is key
Use organic fertilizer together with chemical fertilizer. Organic fertilizer is rich in organic matter, can build up soil fertility, provide a variety of nutrients, and also supply compounds with auxin- and hormone-like properties. Applying organic fertilizer helps maintain the nitrogen reserves in rice paddy soil. Organic fertilizer releases nutrients slowly, while chemical fertilizers are mostly quick-acting fertilizers that supply nutrients rapidly; using the two together makes the nutrient supply relatively steady. The organic acids and humic acids in organic fertilizer can bind with iron and aluminum in the soil, reducing the fixation of phosphate fertilizer by the soil and increasing the amount of available phosphorus and the
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Methods for Extending Rice Seedling Age and Key Points for Preparing to Transplant Rice While Waiting for Rain as a Drought-Resistance Measure
In a normal year, the seedling age for machine-transplanted rice is about 30 days, about 40 days for seedling-throwing rice, and about 50 days for water-raised seedlings. If the water for transplanting comes late, the seedling age must be extended to more than 60 days in order to wait for water before transplanting. First, sow sparsely to cultivate strong seedlings of extended age. That is, by expanding the area of the seedling-raising bed and reducing the sowing rate per square meter, the tillering-stagnation period of the seedlings is prolonged, which can effectively increase the seedling-age flexibility of seedlings sown early at the proper time and improve seedling quality; this can both raise per-unit yield and resolve the contradiction of having no water for transplanting in the early period.
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Correct methods for using rice-specific compound fertilizer
Rice-specific compound fertilizer is a medium-concentration compound fertilizer developed according to the patterns of nitrogen, phosphorus, and potassium requirements of rice after transplanting, and it is most suitable for use as a basal fertilizer in rice transplanting fields. It has the characteristics of "low cost," "convenient use," "fast greening-up," and "good safety." After use, it can enhance crops' resistance to lodging, pests, and diseases, with obvious effects in increasing yield and income. Methods of use: as a basal fertilizer for rice, the dosage is generally 25 kg/mu, and no other chemical fertilizers need to be applied. After fertilization, rice seedlings can be transplanted immediately without
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Harm and Control Methods of Dodder in Potatoes
[Host crops] Potato, tomato, eggplant, pepper, Chinese onion, soybean and many other crops. [Disease diagnosis] It occurs sporadically or in patches in the field. Dodder twines its vine stems around the stems of the plants, coiling around them, and at the point of contact with the potato plant it grows haustoria that penetrate into the stem or petiole tissues, absorbing the plant's water and nutrients, causing the affected plants to grow weakly. The plants are stunted, with bent and slender stems, small and yellowing leaves, and few and small tubers. In severe cases, the stems and leaves of the plant are completely covered with dodder, and the whole plant stagnates and stops growing until it dies. The pathogenic dodder is Chinese dodder (Cuscuta chinensis). The dodder stem is slender
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Key Points and Detailed Operation Methods of Potato Virus Elimination Technology
Potatoes are nutritious and store well. They have a short growing period and great yield-increasing potential, and are a favorite food for people. However, potatoes are susceptible to infection by multiple viruses, which leads to smaller and deformed tubers, seed potato degeneration, and so on. Experiments have proven that using shoot-tip tissue culture combined with virus testing to carry out potato virus elimination, and then producing virus-free seed potatoes for production, can effectively prevent seed potato degeneration and greatly increase potato yield. The main virus elimination methods are as follows: 1. Material collection and disinfection. Sprout the tubers of the variety to be virus-eliminated. When the sprouts are 4-5 cm long, cut the sprouts and peel off the outer leaves.
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How to store potatoes? Sharing practical preservation methods
Storage outside the passes: dig a cellar 2-3 m deep outdoors; its length and width depend on the quantity to be stored. Spread a 2 cm thick layer of ash on the cellar floor to disinfect it and remove the peculiar smell of the soil layer inside the cellar. Fix the cellar cover well and put the potatoes down into the cellar. Cover the potatoes with 15 cm of thick moist black soil to keep them moist and protect them from freezing; if the cellar is shallow, cover them with 20-30 cm of moist black soil. The cellar door should not be sealed too early: in early November cover half and leave half open for ventilation. Seal it all by early December. Controlling the temperature well is the key. Plastic bag storage: if in winter
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Potato Storage Methods and Key Technical Points
Potato, also known as tater, yam, and earth apple, belongs to the Solanaceae family, and its edible organ is the underground tuber. It is rich in starch and protein, serving as both a vegetable and a staple food, and can also be used as feed; it is also a raw material for industries producing starch, alcohol, glucose, and the like. The potato originated in the high mountain regions of Peru and Chile in South America and is now widely distributed throughout the world. In some European and American countries it is mostly used as a staple food. It was introduced into China in 1650. At present, it is cultivated most extensively in the high mountain areas of the Northeast, Northwest, and Southwest. The potato prefers cool conditions and avoids high temperatures, yet it is not tolerant of severe cold or frost. In cool regions, spring planting is mostly practiced
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Detailed Guide to Identifying Symptoms of Major Potato Diseases and Their Control Methods
I. Late blight. 1. Symptom identification. This disease is a fungal disease that affects stems, leaves and tubers. Affected parts of stems and leaves develop brown water-soaked spots, which later expand into black patches. When humid, a ring of white mold-like growth surrounds the lesions, very obvious on the underside of leaves. After tubers are affected, brown or blue lesions initially form, then expand, and the surface gradually becomes sunken, while the potato flesh beneath the lesion turns brown. 2. Control methods. Selecting disease-resistant varieties is the most economical and effective way to control late blight: such as Wushu No. 8, No. 9, No. 11, Longshu No. 3, No. 5
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Symptom Identification and Control Methods for Major Potato Pests and Diseases
The main potato diseases include: potato ring rot, potato wart disease, potato late blight, potato early blight, potato blackleg, potato bacterial wilt, and others. The main insect pests include: potato tuber moth, 28-spotted ladybird beetle, and underground pests (cutworms, white grubs, wireworms, mole crickets, etc.). Among these, three are nationally quarantined pests: potato tuber moth, potato ring rot, and potato wart disease. Main potato diseases. Potato ring rot. Field symptoms generally appear after the flowering stage, with initial symptoms showing
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Methods and Technical Key Points for Controlling the Two Migratory Rice Pests
Control recommendation: For single-cropping rice, carry out one comprehensive control treatment from July 13-15, targeting mainly the rice leaf roller and the white-backed planthopper, and also controlling the small brown planthopper and rice thrips. Pesticide formulations: 1. Use 40-50 ml of 5% fipronil (Regent) suspension concentrate per mu; 2. Use 70-80 ml of 31% fipronil-triazophos (Sanfu) per mu; 3. Use 100 ml of 50% phenthoate per mu; 4. Use 50 ml of 40% chlorpyrifos (Xinnongbao, Saiben) per mu plus 2 g of 80% fipronil (Regent) water-dispersible granules; 5. Use 3
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