Peas like frozen and humid climates, are cold-tolerant, and are intolerant to heat. The seedlings can withstand low temperatures of 5°C. The suitable temperature during the growth period is 12-16°C. The suitable temperature during the pod-setting period is 15-20°C. If the temperature exceeds 25°C, the fertilization rate will be low. Few pods and low yield. ?

Peas are long-day plants. The growth period of most varieties is shorter in the north than in the south. Southern varieties move northward and flower and set pods earlier. This is because spring sowing in the north shortens the seedling period for overwintering in the south. Therefore, in the north, the growth period of peas is 65-75 days for early-maturing varieties, 75-100 days for mid-maturing varieties, and 100-100 days for late-maturing varieties. 185 days.

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Although peas do not have strict soil requirements, they can be planted on well-drained sandy soil or newly cultivated land, but loose soil with high organic matter content is preferred. Neutral (pH

6.0-7.0) soil is suitable, which is beneficial to seedling emergence and the development of rhizobia. When the soil acidity is lower than pH

5.5, diseases are likely to occur and the pod setting rate is reduced. Lime should be applied for improvement. Pea has a deep root system and is slightly tolerant to drought but not tolerant to moisture. Poor drainage during sowing or seedlings can easily lead to root rot. During the flowering period, drought can lead to poor fertilization and the formation of empty pods or dead pods.

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