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 in large amounts. The four elements of nutrition for peanuts. The demand for nutrients varies during different growth periods of peanuts. 1. Seedling period. Seedling root nodules began to form, but nitrogen fixation was weak. This period was a nitrogen starvation period and was very sensitive to nitrogen deficiency. Therefore, peanuts that do not use base fertilizer or have insufficient base fertilizer should be topdressed at this stage. 2. Flowering needle period. During this period, the plants grew faster, and the plants bloomed and formed Fruit needles, and the demand for nutrients increased rapidly. The root-fixing ability of root nodules increased and provided more nitrogen. The absorption of nitrogen, phosphorus and potassium peaked during this period. 3. Closure period. The nitrogen and phosphorus elements required for pods can be supplied at the same time by the root, ovary handle, and ovary, and the required calcium is mainly absorbed by the pod itself. Therefore, when the result layer is deficient in calcium, empty fruits and pods tend to appear. 4. Full fruit ripening period. During this period, the vegetative growth tends to stop, the nutrient absorption decreases, and nutrient nutrients gradually run into the pods. Since the absorption function of the roots decreased during this period, the top dressings should be strengthened to extend the functional period of the leaves and increase the fruit filling rate. Tianji brand phosphorus nitrate (potassium) fertilizer has peanuts need fertilizer characteristics, and its fertilization techniques are: 1. Shi Ji Fei. Mu Shi 35 kg Tianji brand phosphorus nitrate and potassium fertilizer. 2. In the flowering period, the fertilizer is applied to 10 kg of phosphorus nitrate per acre. 3. Root dressing outside. In the late growth period of peanuts, foliar spraying with 0.2% boric acid was performed.
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