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Winter Management Methods and Technical Key Points for Gastrodia elata in Jilin Province
Jilin Province has a long, cold winter, during which Gastrodia elata is in a dormant state. Preventing freezing damage and rot in Gastrodia elata is the key to achieving a bumper harvest. ① Management of pit-cultivated Gastrodia elata. Pit-cultivated Gastrodia elata usually overwinters outdoors. Before the onset of winter, the soil moisture in the Gastrodia elata pit should be kept at 30%-40%, and excessively wet conditions and water accumulation should be prevented. Drainage ditches should also be dug around the Gastrodia elata pit to prevent snowmelt water from flowing into the pit. Before freezing, cover the Gastrodia elata pit with a 15 cm thick layer of leaves or weeds, then add 20-30 cm of cold-protection
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How to Apply Fertilizer Skillfully to Cotton? A Explanation of Practical Technical Points
Fertilizer is the material basis for high cotton yields, and applying fertilizer according to need is the highest principle of cotton fertilization. Where conditions allow, soil testing and fertilizer recommendation should be carried out, and based on the available nutrient content of the soil and the needs for high cotton yields, the type and amount of fertilizer to apply should be determined. For most cotton fields in the north, the amount of potassium fertilizer should be increased, the amount of phosphorus fertilizer reduced, and nitrogen fertilizer mainly used for topdressing, or a formula fertilizer with "high potassium, low phosphorus, medium nitrogen" should be applied. If a compound fertilizer with equal amounts of nitrogen, phosphorus and potassium is used, the amount per mu should not exceed 25 kg, plus an additional 12.5 kg of potassium fertilizer
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Detailed Explanation of Key Technical Points for Formula Fertilization of Cotton
Cotton has an indeterminate growth habit, strong regeneration capacity, highly controllable plant architecture, and a high fertilizer demand. Generally speaking, adequate fertilizer is the foundation for high yield and quality in cotton. Sufficient phosphate fertilizer can promote vigorous growth of cotton plants, increase boll weight, and advance maturity. Potassium fertilizer is a catalyst for various enzymes in plants, and can promote photosynthesis and cellulose synthesis. The fertilization technique for cotton is the eight-character formula fertilization method of "adjust nitrogen, increase potassium, supplement phosphorus, spray boron." Specifically, the following 5 technical measures should be well implemented. 1. Attach importance to the application of farmyard manure
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Technical Points for Spraying Foliar Fertilizer on Cotton to Increase the Boll Setting Rate
This year, the summer-ripening crops in Haimen City were delayed in maturity due to climate effects, and after the summer harvest there was a continuous drought until mid-July, when it rained heavily for several consecutive days. This weather pattern of drought followed by rain was very unfavorable for the survival and growth of the already delayed transplanted cotton, and the growth process was delayed by about 10 days compared with normal years. To increase the formation speed of flower buds in the late stage of cotton and improve the boll setting rate, it is recommended to strengthen fertilizer management in the late stage by means of foliar spraying. 1. Combine pest control with proper timing of fertilizer application. Not every pest control treatment requires
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What are the key technical points of Taishan eel farming in earthen ponds?
The Taishan earthen pond eel farming model is an extensive farming model developed by referring to the earthen pond farming model for Chinese carp. Its characteristics are: ① The ponds are large, generally more than 4 mu, up to 20-30 mu, and developed in contiguous tracts; ② The stocking density is low; ③ Water sources are insufficient, and the water is used for a whole grow-out cycle, with a water depth within 1.2 m; ④ The soil quality is good, mainly loam; ⑤ Aeration facilities are fully equipped; ⑥ The feeding method is to feed to satiation at every meal until feed remains; ⑦ The annual grow-out rate is above 90%. Taishan earthen ponds are mostly developed from land created by reclaiming land from the sea and enclosing it into fields, and the soil is mostly loam, with water retention performance.
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Prevention and Control Methods and Technical Key Points for Protozoan Diseases in Large Yellow Croaker
(1) Pathogen: Cryptocaryon irritans (Crypjocaryonirrions). (2) Symptoms: Small white spots appear on the body surface and gills of diseased fish. These small white spots are white vesicles formed by the parasitism of the parasite, irritation of the host, and the secretion of large amounts of mucus and proliferation of epidermal cells in the surrounding tissues. In severe cases, the body surface tissues are destroyed. If bacteria invade, it can cause skin inflammation, scale loss, fin membrane rot and splitting, corneal damage, and blindness. The diseased fish ultimately die due to loss of appetite,
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How are adult crabs caught and transported? Detailed explanation of the technical points
The crab catching methods and transport techniques are described below: 1. Flowing-water catching method: this is exactly the season of reproductive migration for river crabs, and the vast majority of river crabs leave their burrows and move about in the pond. Set up a lift net or trap at the outlet of the crab pond, then slowly drain the pond water, and large numbers of river crabs can be caught in the net or trap. 2. Light trapping method: pump out a certain amount of pond water to keep a water depth of about 30 cm; at night, when river crabs come ashore in large numbers, set lamps at the four corners of the pond with a vat buried under each lamp, and the light attracts them
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Key Technical Points for Pest Control and Fertilization of Wheat in Winter and Early Spring
When temperatures are relatively low in winter and early spring, pest control and fertilization in wheat fields should pay attention to the following two points: For pest control, to control wheat aphids, red spiders and other pests, spraying omethoate is more effective than dimethoate. This is because the insecticidal efficacy of dimethoate against pests decreases significantly as the temperature drops, while the efficacy of omethoate is less affected by temperature and can exert normal insecticidal action at temperatures below 15°C. Similar to omethoate is fenvalerate; the toxic efficacy of fenvalerate at 15°C is instead stronger than at 25°C. Fertilization: For topdressing, applying ammonium bicarbonate is better than urea. Ammonium bicarbonate
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Garlic management has its subtleties, and the technical points must be clearly explained
1. What is the current management focus? Garlic has now grown 7-9 leaves, and the growth period has entered the late stage of scale bud and flower bud differentiation. This stage is dominated by leaf growth and is a critical period for garlic growth and development. The root system gradually expands and shifts from vertical growth to horizontal growth, root growth strengthens, and the accumulation of nutrients accelerates; this is the period that lays the foundation for the growth of garlic scapes and garlic bulbs. Due to the earlier mother bulb degeneration, together with the long duration of cold spring weather this year and delayed watering and topdressing, the plants show dry tips and physiological dry leaves because of a nutrient gap, with grayish, dull leaf color and poor growth
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The key "three waterings and three fertilizations" technical points for garlic cultivation
Water and fertilizer management after garlic turns green is the key to a bumper garlic harvest. As the weather warms up, water and fertilizer uptake gradually increases after greening, especially during the bolt-bearing stage and the bulb swelling stage, which are the peak periods of water and fertilizer demand for garlic. Therefore, throughout the entire growth period of garlic, timely watering and topdressing should be carried out according to soil moisture conditions and soil fertility and seedling conditions, with special emphasis on doing well the "three waterings" and "three fertilizations." 1. Water the greening water well and apply the greening fertilizer well. By the Spring Equinox, the garlic seedlings begin to turn green and grow. Because the early spring soil temperature is low, it is best to water the greening water at noon
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