Peanut needs to absorb a large number of elements such as nitrogen, phosphorus, potassium, calcium, magnesium and sulfur, and trace elements such as iron, molybdenum and boron. Among these elements, nitrogen, phosphorus, potassium and calcium are required to be larger. Four elements for peanut nutrition. The demand for nutrients varies from peanut to maturity.
1. Seedling period. The root nodule began to form at the seedling stage, but the nitrogen fixation ability was weak. This period was a nitrogen starvation period and was very sensitive to nitrogen deficiency. Therefore, peanuts that do not have a base fertilizer or insufficient amount of base fertilizer should be topdressed in this period.
2. Flowering down the needle period. In this period, the plants grow faster, and the plants bloom a lot and form fruit needles, and the demand for nutrients increases sharply. The nitrogen fixation capacity of root nodules is enhanced, which can provide more nitrogen. In this period, the absorption of nitrogen, phosphorus and potassium reaches a peak.
3. Pouring period. The nitrogen and phosphorus elements required for pods can be supplied simultaneously by roots, ovary stalks, and ovary, and the required calcium is mainly absorbed by the pod itself. Therefore, when the result layer is deficient in calcium, empty fruit and capsule are prone to occur.
4. Full fruit ripening period. In this period, vegetative growth tends to stop, nutrient absorption is reduced, and nutrient nutrients gradually move into the pod. Due to the decline of root absorption function in this period, the top dressing should be strengthened to extend the functional period of the leaves and increase the fruit filling rate.
Tianji brand phosphorus and potassium (potassium) fertilizer has the fertilizer-requiring characteristics of peanut, and its fertilization technical points are: 1. Shiji fertilizer. Apply 35 kg of Tianji brand NPK fertilizer. 2. In the flowering lower needle period, each acre of topdressing Tianji brand 10 kg of nitrate. 3. Top dressing. At the late stage of peanut growth, foliar application was carried out with 0.2% boric acid.
From: Henan Daily Rural Edition
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