Peanut seedling period requirements for the environment
Peanut seedling period requirements for the environment Peanuts were unearthed from 50% of the seedlings, showing two true leaves to 10% of the seedlings, and the main stem had 7-8 true leaves at the seedling stage. Under normal conditions, early-maturing varieties are 20-25 days, and mid-late-maturing varieties are 25-30 days. One of the main fertility processes is the growth and development of the root system, and the second is the growth and development of stems and leaves. 1. Temperature: The seedling stage of peanut is most suitable for the development of meristem and the temperature of the leaf growth is 20-22°C. The average temperature of more than 25 °C, can shorten the seedling period, making the stem branches longer, base section elongated, is not conducive to seedlings. The average temperature is lower than 19°C, the stem branching is slow, the flower bud differentiation is slow, and the initial flowering period is delayed, forming the "little old seedling" 2. Moisture: The water requirement of the plants at the seedling stage is the least, accounting for 3.4% of the total amount of the whole period. At this time, the optimum soil moisture content is 45%-55% of the maximum water holding capacity in the field, which is lower than 35% of the maximum water holding capacity. The new leaves do not show, the flower bud differentiation is inhibited and the initial flowering period is postponed; the maximum water holding capacity is 65 %, it is easy to cause the stem to grow long, the base section is elongated, the root development is slow, and the stem is shallow, which is not conducive to the formation of flower organs. 3. Light: The optimum daily sunshine hours is 8-10 hours. More than 10 hours of sunshine hours, stems lengthy, delayed flowering; less than 6 hours, stem growth retardation, flowering ahead of schedule. Peanuts require greater variation in light intensity. The optimum light intensity is 51,000 kan/m2, less than 10,200 kan/m2 or greater than 82,000 kan/m2, which affects the photosynthetic efficiency of the leaves.
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