When is the best time for peanut topdressing?

Peanut is a common crop in our country, which can not only extract oil, but also make all kinds of cakes and delicacies. At present, most areas are planting, and if you want to grow peanuts well, you must apply fertilizer. When is the best time for peanuts to be fertilized?

When is the best time for peanut topdressing?

The main results are as follows: 1. At seedling stage, quick-acting nitrogen fertilizer and Huawang No. 3 were applied at 3-5 leaf stage to promote flower bud differentiation and more flowering, which had a good effect on promoting early growth of branches and increasing the number of flowers and pods.

2. Flowering and podding stage: nutrient absorption increased sharply after anthesis, but rhizobium also began to supply peanut nitrogen nutrition continuously. If excessive nitrogen fertilizer was applied, it was easy to cause excessive growth of stems and leaves and seedling collapse in the later stage. Therefore, it is generally not to apply nitrogen fertilizer after flowering, but mainly to grasp the early flowering stage of peanut combined with the last intermediate ploughing and weeding, and apply compound fertilizer and calcium fertilizer. And spray Diguo Zhuangtieling to thicken the nutrient transport conduit of underground fruit, improve the swelling vitality of ground fruit, strong fruit type, high quality and high yield.

3. Pod filling period: the demand for phosphorus in this period is increased, so the method of spraying phosphorus outside the root can be adopted. 0.3% potassium dihydrogen phosphate plus new high-fat membrane spray is used to improve the utilization rate of effective components of chemical fertilizer, spraying once every 7-10 days and spraying 2-3 times continuously.

Second, how to fertilize peanuts?

The main results are as follows: 1. Topdressing at seedling stage: when the soil fertility is low, the amount of base fertilizer is insufficient, and the seedling growth is poor, we should apply seedling fertilizer early and promote the seedling to develop early. Topdressing at seedling stage should be applied before the first flowering stage, mainly nitrogen fertilizer and the combination of phosphorus and potassium fertilizer. Generally apply 8 to 10 jin of nitrogen fertilizer per mu, or 30 to 40 jin of compound fertilizer, sprinkled or ditched.

2. Flowering stage: after the initial flowering of topdressing peanut, the plant grows vigorously, a large number of effective flowers bloom, a large number of fruit needles go into the soil one after another, and the demand for nutrients increases rapidly. if the basal fertilizer and seedling fertilizer are insufficient, the peanut should be topdressing in time according to the appearance of peanut. But at this time, the nitrogen fixation capacity of peanut rhizobia is strong, the amount of nitrogen fixation can basically meet their own needs, and the demand for phosphorus, calcium and potassium fertilizer is urgent, so the amount of nitrogen fertilizer should not be too much, mainly to topdressing phosphorus, potassium and calcium fertilizer, so as not to cause excessive growth. Generally, 40 jin of calcium superphosphate and 500 jin of high-quality organic fertilizer are applied per mu to improve the nutrition of phosphorus and calcium in peanuts.

3. Foliar fertilizer spraying: peanut foliar fertilizer spraying (also known as extra-root topdressing) has the effect of high absorption and utilization, fertilizer saving and yield increasing. Especially in the later stage of peanut growth and development, the root system is senescent and the effect of foliar fertilizer spraying is more obvious. Foliar spraying nitrogen fertilizer, peanut absorption and utilization rate of more than 50%; foliar spraying phosphate fertilizer, can quickly transfer to the pod, promoting pod fullness. Peanut growth late, per mu with 200 grams of potassium dihydrogen phosphate, 120 jin of water foliar spray, it is best to spray 3 times, once every 7 days.