Peanut

1. Nutritional characteristics

The growth and development stages of peanut include seed germination stage, seedling stage, flowering stage, pod stage and full fruit maturity stage. From the germination stage to the seedling stage, vegetative growth is the main, rooting, branching, long leaves, and flower buds begin to differentiate. Vegetative growth and reproductive growth go hand in hand in the stage of flowering and underpinning, with a large number of nodule formation and enhanced nitrogen fixation ability. From pod stage to full fruit maturity stage, mainly reproductive growth, a large number of fruit needles into the soil to form young fruit or chaff fruit, improve the saturation rate.

2, need fertilizer characteristics

In the whole growth period of peanuts, the amount and proportion of nitrogen, phosphorus and potassium are different due to different factors such as soil, climate, varieties and planting methods. The yield of 250 ~ 300 kg per mu requires nitrogen (N) 8 ~ 11 kg, phosphorus (P2O5) 4 ~ 6 kg, potassium (K2O) 5 ~ 10 kg.

The amount and proportion of nitrogen, phosphorus and potassium absorption were different in different growth stages of peanut. The amount of nitrogen, phosphorus and potassium absorption was less in seedling stage, gradually increased in flowering stage, reached the maximum in pod stage, and decreased in maturity stage. Pod stage has a large number of pod formation, is also the most nutrient absorption period, nitrogen absorption accounted for 42% of the total absorption of the whole growth period, phosphorus accounted for 46%, potassium accounted for 60%.

Calcium-deficient peanut plants grow slowly, empty shell rate is high, and yield is low. The application of calcium can promote the development of peanut root and nodule, promote the formation of pod and increase the satiety rate. At the same time, calcium can regulate soil acidity, improve peanut nutrition environment, and promote soil microbial activity. Molybdenum is an indispensable element in the process of nodule nitrogen fixation. Molybdenum can promote protein synthesis and increase nitrogen fixation ability. (Taken from the network, if there is infringement, please contact to delete.)

3. Fertilization technology

Base fertilizer: It is recommended to apply strong high-nitrogen special formula fertilizer (20-10-10), applying 40 ~ 50 kg per mu.

Topdressing: For areas with high yield requirements, it is recommended to combine soil cultivation at the beginning of flowering, and apply 5 ~ 10 kg of urea, superphosphate and potassium sulfate or 10 ~ 15 kg of special formula fertilizer with high nitrogen and high potassium.

The spreading should be combined with the ploughing of the cultivated land into the soil or the furrow covering. The furrow application should pay attention to the separation of fertilizer and seeds, and keep at least 8 ~ 10 cm distance to prevent the burning of seeds and seedlings.