Nitrogen, phosphorus and potassium can meet the needs of effective fruit development for N, P, and K nutrients, increase the number of effective pods and fullness of pods, and have a significant effect on yield increase. Potassium dihydrogen phosphate solution with 0.2% potassium per kg can be sprayed evenly on each leaf of the leaves for the performance of potassium deficiency and phosphorus deficiency; at the same time, 0.5 to 1 kg of urea can be added per acre for nitrogen deficiency performance.
Boron fertilizer can promote pollen germination, is conducive to pollination and fertilization, improve fruit set rate, while also increasing chlorophyll content, to prevent the occurrence of physiological diseases. 120 kg of borax was used to water 50 kg per acre, which was sprayed once during the full flowering period of the autumn peanut and full fruit filling period. Note: The borax should be dissolved with a small amount of water and then diluted with water.
Molybdenum molybdenum promotes the nitrogen fixation of peanut rhizobia, and timely supplements molybdenum fertilizer during the fall of needles during the fall season of the peanut, which is beneficial to increase the fruit weight. Each time 50 kg of ammonium molybdate was used to water 50 kg, and each was sprayed once at full flowering stage and full fruit filling stage.
Iron-fertilized peanuts are extremely sensitive to iron. Peanuts grown in alkaline soils are prone to iron deficiency and show symptoms of yellow-leaf whitening. The timely application of iron fertilizer can make the color of peanut leaves turn green from white to white within a few days to avoid and reduce the harm caused by iron deficiency. In the peanut flowering stage, crusting stage or emergence of yellowing symptoms of new leaves, spraying with 0.2% ferrous sulfate solution spraying, generally every 5 to 6 days spray 1, continuous spraying 2 to 3 times.
Manganese nutrient peanut growth, lack of manganese, brown spots appear on the edge of leaves, flowering, maturity delay, poor fruit development. Severe lack of manganese, chlorosis between veins, its typical appearance is "wet spot" shape. In particular, the availability of manganese in alkaline soils is low and manganese deficiency is prone to occur. Application of manganese fertilizer on manganese-deficient soil can increase peanut production by more than 10%. From peanuts entering the period of fruit pin enlargement to 15-20 days before harvest, every 10 to 14 days, evenly spraying with 0.1% manganese sulfate solution 50-60 kg per acre.
The application of trace element fertilizer after photosynthesis of peanuts in photosynthetic micronutrient fertilizer not only satisfies the need of multiple trace elements, but also inhibits photorespiration, reduces the consumption, improves the photosynthetic efficiency, promotes the full filling of mangoes, and has obvious effect on yield increase. During the full flowering period of the autumn peanuts and the full fruiting period, 100 g of photosynthetic micro-fertilizer and 50 kg of uniform water were sprayed for each mu. Note that the application time is preferably cloudy or sunny after 3 pm.
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