What are the benefits of spraying foliar fertilizer in the late growth stage of peanuts?

Foliar spraying of fertilizer on peanuts has effects such as a high fertilizer absorption and utilization rate, saving fertilizer, and significantly increasing yield. Applying foliar fertilizer in the middle and late stages of peanut growth can effectively improve the photosynthetic efficiency of peanut plants, increase dry matter content, and enable good individual plant development. It plays a good role in promoting more pods, larger pods, and plump seeds per plant, increasing yield and income, and improving pod quality:

Superphosphate extract: Peanut leaves have a relatively strong ability to absorb phosphorus. During the flowering stage and the pegging and pod-setting stage, use a 1.5%-2% concentration of superphosphate water extract (soaked for 14-16 hours and filtered) twice, spraying about 60 kg per mu each time. This can enhance flowering and pod-setting performance, generally increasing yield by 7%-10%.

Urea solution: For peanut fields with relatively sandy soil, thin soil fertility, insufficient base fertilizer, short plants, weak growth, and yellowing leaves showing signs of fertilizer deficiency, spray a 0.7%-1% concentration urea water solution on the leaves from the flowering stage to the pod-setting stage. For fields with vigorous seedlings and healthy plants showing a tendency to overgrow, there is no need to spray urea.

Plant ash extract: Plant ash is a farmyard potassium fertilizer, containing on average more than 5%-6% potassium, of which more than 90% is water-soluble potassium carbonate. From the beginning of pod setting to the pod enlargement stage of peanuts, spraying a 5% concentration plant ash water extract twice, combined with earthing up, can increase peanut yield by more than 20%.

Potassium dihydrogen phosphate solution: Potassium dihydrogen phosphate is a phosphorus-potassium binary compound fertilizer, which can meet the needs of peanut peg development, increase the number of filled pods, raise the 100-seed weight and oil content, and also prevent premature aging, with a significant yield-increasing effect. Generally, from the flowering stage to the pod enlargement stage of peanuts, spray a 0.3% concentration of potassium dihydrogen phosphate on the leaves twice.

Ammonium molybdate solution: Molybdenum can promote nitrogen fixation by rhizobia in legume crops. Spraying during the flowering stage can also coordinate vegetative growth and reproductive growth, promote full pods, and increase yield by more than 10%. The best effect is achieved by seed dressing with ammonium molybdate combined with foliar spraying. From the flowering stage to the pod-setting stage of peanuts, spray a 0.1% concentration ammonium molybdate water solution on the leaves twice.

Boron fertilizer solution: Boron can promote pollen germination, facilitate pollination and fertilization, and increase the pod-setting rate of peanuts. It can also increase chlorophyll, promote photosynthesis, and increase pod weight and filled-pod rate. Generally, at the early flowering stage and full flowering stage, spray once each with a 0.2% borax or boric acid water solution.

Ferrous sulfate solution: Peanuts are extremely sensitive to iron. When grown on alkaline soil, they are prone to iron deficiency, showing symptoms of yellow leaves and whitening. If iron fertilizer is sprayed in time, they can turn green within a few days. According to experiments, spraying a 0.3%-0.5% ferrous sulfate solution twice in succession at the flowering stage can increase yield by more than 13%. Manganese sulfate solution: For every 1 ton of dry matter formed, peanuts need to absorb 39 grams of manganese. Applying manganese fertilizer on manganese-deficient soil generally increases yield by 8%-11%. Application method: starting 30-50 days after peanut sowing and ending 15-20 days before harvest, spray with a 0.1% manganese sulfate solution once every 10-14 days; if necessary, it can be mixed with fungicides for controlling peanut leaf spot.

Photosynthetic microfertilizer solution: Photosynthetic microfertilizer contains both multiple trace elements and a photorespiration inhibitor. When used on peanuts, it can not only meet their needs for trace elements, but also inhibit photorespiration, reduce consumption, and promote filled pods, increasing yield by more than 15%. Spray twice in succession during the flowering and pegging stage of peanuts, once every 10 days or so, using 100 grams of photosynthetic microfertilizer per mu each time, diluted with 50 kg of water, and choose to spray on cloudy days or in the afternoon of sunny days when sunlight is not too strong.

Rare earth microfertilizer solution: Rare earth microfertilizer, also called rare earth nitrate, is a new type of rare earth element fertilizer first developed and key promoted in China. Seed dressing with rare earth microfertilizer or foliar spraying can enhance plant vitality and promote photosynthesis and metabolic functions, thereby achieving the goal of increasing yield, with an average yield increase of 9.5%-14%. From the initial flowering stage to the pod-setting stage of peanuts, spray a 0.08% concentration rare earth microfertilizer water solution twice, with an interval of 15 days.