After the fall peanuts enter the stage of the lower needles, the temperature gradually decreases and the rainwater begins to decrease, which will affect the growth of the upper part of the vine stems and leaves to varying degrees. However, this is the critical period for the growth of autumn peanuts. Therefore, the timely use of extra-root fertilizers to supplement nutrients can enhance the growth potential and prevent the premature decline of stems and leaves, and effectively improve the seed setting rate and fruiting rate. The following are the types of fall-fat dressing after fall flowering:
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. For the performance of phosphorus deficiency potassium can use 0.2% potassium dihydrogen phosphate solution 60 kg evenly sprayed over the foliage; at the same time there are nitrogen deficiency performance per acre can add urea 0.5 to 1 kg.
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 grams of borax and 50 kg of water were used per acre, which were sprayed once during the full flowering period of the autumn peanut and the 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 grams of ammonium molybdate and 50 kilograms of water were sprayed at the flowering stage and the 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, the pod stage or the emergence of new leaves yellow symptoms, with 0.2% ferrous sulfate solution spraying, generally every 5 to 6 days spray 1, continuous spraying 2 or 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 to 20 days before harvest, every 10 to 14 days, evenly spray with 0.1% manganese sulfate solution 50-60 kg per mu.
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. In the autumn flowering period of full-fledged peanuts and full-filling of fruit fodder, 100 g of photosynthetic fertilizer and 100 g of water and 50 kg of water are sprayed once per mu. Note that the application time is preferably cloudy or sunny after 3 pm.
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