ã€High-fertilizer land plots】 According to the analysis of nutrient absorption of nitrogen, phosphorus, and potassium and the absorption and utilization of fertilizer by 500 kg of mango per acre, the proportion of fertilization is: 14.8 kilograms of nitrogen per acre, 11 kg of phosphorus, potassium 16 Kilograms were converted into 5000 kg of high-quality fertilizer, 13 kg of urea or 35 kg of ammonium bicarbonate, 72 kg of superphosphate, 22 kg of potassium sulfate or 18 kg of potassium chloride, or 138 kg of plant ash.
ã€Medium Fertilizer Land】To achieve the goal of 500 kg per mu for peanut production, the proportion of fertilizer application is: 27 kg of nitrogen per acre, equivalent to 10,000 kg of high-quality ring fertilizer, 26 kg of urea or 70 kg of ammonium bicarbonate, and the same amount of other fertilizers. In acid soils in the yellow floodplain and the flooded areas, about 30 kg of gypsum or phosphogypsum should be added, mainly to increase calcium.
ã€Base Fertilizer】Mainly consists of decomposed organic fertilizers, with chemical fertilizers such as nitrogen, phosphorus, and potassium. Each acre Shi 500 ~ 2000 kg quality circle fertilizer, peanut production is 150 ~ 200 kg; per acre Shi 2500 ~ 3000 kg quality circle fertilizer, peanut production is 250 ~ 300 kg. The poorer the fertility, the more obvious the effect of organic fertilizer, the new whole farmland must apply more organic fertilizer in order to ensure the high yield of the year.
Fertilizer is generally 1/3 of the total amount of fertilizer.
[Fertilization] Top dressing in seedling stage: Miaofei should be applied before and after the initial flowering. The earlier the time, the better. N, P and K should be equal. However, the quantity should not be too much and should be determined according to the seedling growth. General use of ammonium sulfate 5 to 10 kilograms per acre, superphosphate 10 to 15 kilograms, and 500 to 1000 kilograms of high-quality ring fertilizer mixed application, or chase wood ash 50 to 80 kilograms, should mix soil or spread ditch application.
Flower-needle fertilizer: If the base, Miaofei not enough, it should be based on growing looks, timely application of fertilizer. During the flowering period, topdressing nitrogen fertilizer can be used as a reference fertilizer at the seedling stage. In addition, according to the characteristics of direct absorption of phosphorus and calcium nutrition in peanuts, young fruit can be topped with 10 to 20 kg of superphosphate and 150 to 250 kg of high-quality circumfertilizer per acre, which can improve phosphorus and calcium nutrition of peanuts. .
Outside the root dressing: In the late fertility and fertilizer can not be applied in the case of rhizosphere dressing, spraying 2% to 3% of superphosphate aqueous solution 75 to 100 kg per acre, spray every 7 to 10 days , spray 2 or 3 times. If the flower growth potential is weak, urea 2.25 ~ 3 kg can also be added mixed spray. Foliar application of potassium, molybdenum, boron and other fertilizers, have a certain effect of increasing production. Potash can be 5% to 10% of the ash leaching solution, or 2% potassium sulfate, potassium chloride solution, spray 60 kg per acre. Peanut pods can be used with 150-200 grams of potassium dihydrogen phosphate per acre, and 50 kilograms of water can be sprayed. It is best to spray 3 times, 7 days apart.
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