Temperature requirements for the growth and development of soybean
Soybean is a temperature-loving crop. The accumulated temperature of soybean varieties in Heilongjiang Province is about 1800 ℃.
The main results are as follows: (1) the optimum temperature for seed germination is 18 ℃ 20 ℃, at which time the germination is fast and the seedling is uniform; the lowest temperature is 6 ℃ 8 mol, but it is very slow; when the temperature reaches 33 ℃, the germination is the fastest, but the seedling is weak.
(2) the lowest temperature needed for seedling emergence is 8 Mel 10 ℃.
(3) it is suitable for flower bud differentiation to be 21 ℃ 23 min. It is suitable for 22 ℃ to blossom. The temperature is too high or too low to blossom less.
(4) the suitable soil temperature for root growth is 22 ℃.
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What nutrients do soybeans need for growth and development?
Soybean needs a large number of nutrients and many kinds. If the same yield is formed, soybean needs 4-5 times more nitrogen than cereal crops. The nutrients it needs are mainly nitrogen, phosphorus and potassium, followed by calcium, magnesium, sulfur, magnesium, boron, molybdenum, manganese, zinc and copper.
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What is the response of soybean growth and development to light?
Soybean is a short-day crop with a sunshine range of 9-18 hours. the shorter the light is, the more it can promote flower bud differentiation and early flowering and maturation. when the first compound leaf of soybean grows, it responds to light, and the seedlings can complete the illumination stage by 5-12 days of short-day sunshine. The appearance of calyx primordium in the plant indicates that the lighting stage has been completed. Due to the long-term adaptation to local light conditions, the short-day response of soybean is quite different. The short-day response of southern soybean varieties is strong, while that of northern soybean varieties is not sensitive to sunshine, so special attention should be paid to introduction.
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