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What are the precautions for feeding pigs soybean cake?
Soybean cake is a high-quality feed for pigs, containing about 40% crude protein and 6%-8% fat; its crude fiber content is very low, only below 5%. In the protein, lysine accounts for 2.9%, while methionine and tryptophan each account for 0.6%. Its amino acid content is higher than that of any other plant-based protein feed, making it the most valuable among plant feeds. Soybean cake has an aromatic fragrance, and pigs love it very much, but it lacks vitamin D, carotene, and calcium. Some carrots and mineral feeds such as bone meal and stone powder should be supplemented. The amount of soybean cake used must not be too much, generally accounting for about 15% of the daily ration.
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What are the methods for preventing and controlling soybean flower and pod drop?
1. Reasonable topdressing. Usually, soybean is topdressed once with nitrogen fertilizer at the early flowering stage, which can reduce the rate of flower and pod drop, extend the lifespan of the plants, increase grain weight, and raise yield. Generally, 150-230 kg of ammonium nitrate or 120-180 kg of urea can be applied per hectare; at the flowering and podding stage, foliar topdressing can be carried out, using 0.5 kg of urea, 1.5 kg of superphosphate, 0.3 kg of potassium sulfate, and 30 g of borax per mu, adding 50 kg of water, extracting the leachate, and spraying it on the leaf surface, which helps preserve flowers, increase pods and grains, and raise the 100-
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Key Techniques for Mechanized High-Yield Cultivation of Densely Planted Soybean
The integrated mechanized high-yield cultivation technique for densely planted soybean is based on the three-ridge soybean cultivation technique, while continuing to maintain deep loosening, layered deep fertilization, and precision sowing. It draws on foreign experience in narrow-row dense planting and semi-dwarf varieties for increasing yields, and combines these with matching machinery to form an integrated mechanized high-yield cultivation technique, including flat-planting dense planting technology and small-ridge dense planting technology. I. Technical advantages 1. Reasonable dense planting increases yield. The technical feature is reasonable dense planting, uniform crop distribution, and increased crop photosynthesis. Select lodging-resistant semi-dwarf varieties, increase
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What are the key technical points for flat-planting narrow-row dense planting of soybeans?
Key technical points for flat-planting narrow-row dense planting of soybeans: 1. Seed and treatment: For variety selection, choose suitable varieties according to the local ecological type and local conditions. 2. Seed quality: It must reach Grade II improved seed or above under the seed grading standard. 3. Seed treatment: Use seed coating agent for seed dressing, selected according to the types of pests and diseases and soil conditions. 4. Rotation and tillage land preparation: For crop rotation, use a rotation of more than 3 years, do not plant continuously or on adjacent stubble, and the previous crop should mainly be wheat-type crops. For tillage, adopt mainly deep loosening, combining loosening and harrowing, to facilitate drought resistance and moisture conservation. 5
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Key Cultivation Techniques for Soybean Deep Loosening, Narrow-Row, Flat Sowing and High-Density Planting
Soybean deep loosening, narrow-row, flat sowing and high-density planting is another "new high-yield cultivation model" following "ridge three" and "large ridge density." It integrates advanced techniques such as deep loosening and rotary tillage for seedbed preparation, uses fertilizer to support density and density to increase yield, increases the canopy leaf area index, and improves light interception rate, achieving cost savings and efficiency gains in soybean production. Over two years, Luobei County promoted and planted 16000 mu in Tuanjie, Fengxiang, Zhaoxing and Taipinggou, with an average yield of 206 kg per mu, a 43% increase over the control.
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What temperature requirements does soybean growth have? Detailed explanation of the suitable temperature range
Soybean is a warm-season crop and has different temperature requirements at each growth and development stage. First, seed germination is very sensitive to temperature: the minimum germination temperature is 6°C, emergence is 8-10°C, and seedlings suffer slight frost damage at a low temperature of -4°C. Throughout the growth period, the optimum growth temperature for soybean is a daily average temperature of 20-25°C, among which the optimum growth temperature for seedlings is 20-21°C, the flower bud differentiation stage is 21-23°C, the flowering stage is 22-25°C, the pod-setting and seed-filling stage is 21-23°C, and the maturation stage is 19-
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What are the responses of soybean growth and development to light?
Soybean is a short-day crop, with a daylength range of 9-18 hours. The shorter the light, the more it promotes flower bud differentiation and advances flowering and maturity. When soybean grows its first compound leaf, it begins to respond to light. Generally, seedlings can complete the light stage after 5-12 days of short-day conditions. The appearance of flower calyx primordia on the plant marks the completion of the light stage. Due to long-term adaptation to light conditions in different regions, the short-day response of soybean varies considerably. Southern soybean varieties have a stronger short-day response, while northern soybean varieties are insensitive to daylength, so special attention should be paid when introducing varieties.
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What are the temperature requirements for soybean growth and development?
Soybean is a warmth-loving crop, and the accumulated temperature required by soybean varieties in Heilongjiang Province is about 1800-2700°C. (1) The optimum temperature for seed germination is 18-20°C, at which germination is fast and seedlings emerge evenly; the minimum temperature is 6-8°C, but germination is very slow; when the temperature reaches 33-36°C, germination is fastest, but the seedlings are weak. (2) The minimum temperature required for emergence is 8-10°C. (3) For flower bud differentiation, 21-23°C is more suitable. For flowering, 22-25°C is more suitable. If the temperature is too high or too low, there will be fewer flowers. (4) The suitable
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What nutrients are essential for soybean growth and development?
Soybeans require large amounts of nutrients in many different forms. For the same yield, soybeans need 4-5 times more nitrogen than cereal crops. The main nutrients they require are the three major elements nitrogen, phosphorus and potassium, followed by 9 trace elements including calcium, magnesium, sulfur, magnesium, boron, molybdenum, manganese, zinc and copper.
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Trace elements needed for soybean growth and application methods
Normal soybean growth requires some trace elements, among which the more important ones are molybdenum, boron, zinc, manganese, etc. Molybdenum is a component of soybean root nodule nitrogenase and an indispensable component for the normal life activities of nitrogen-fixing bacteria. Boron is also very important in soybean life activities. Soybeans deficient in boron have poor root development and poor nodule formation, losing their nitrogen-fixing ability. Therefore, attention must also be paid to trace elements. Can the trace elements needed by soybeans be satisfied from the soil? This depends on the abundance or deficiency of trace elements in the soil and environmental conditions. For example, in low-lying or poorly drained
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