Peanuts are one of the major cash crops in the city, with wide adaptability and high nutritional value. In order to achieve high quality and high yield of peanuts, the following fertilizer application techniques are specifically proposed:
First, the principle of fertilization
During the whole growth period of peanuts, there are many kinds of fertilizers needed, and there are obvious effects on them: nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur. There is also a need for appropriate trace elements. Peanut itself has rhizobia, with nitrogen fixation. Peanuts are very sensitive to phosphate fertilizers and require more calcium and potassium fertilizers. According to the soil characteristics and experimental conditions of the city, the peanut field showed acidification in the past three years, resulting in the lack of molybdenum in the soil, which is not conducive to the growth of peanuts. Therefore, the fertilizer should be mainly organic fertilizer, supplemented with appropriate amount of nitrogen fertilizer, and re-apply phosphate fertilizer. Potassium, calcium, magnesium, sulfur, and moderate amounts of zinc, boron, iron fertilizer, and molybdenum fertilizer.
Second, fertilization method
After testing the soil that has been acidified (pH less than 5.5), 25 kg of acidified soil improver should be applied per acre before the end of March (improvement cannot be applied within one month before the planting of peanuts). The application method is: spread the improver by spraying evenly. At the surface and evenly. For loamy soil, organic fertilizer is usually used as a base fertilizer to mix trace elements, and methods of spreading and ploughing are mostly used. Nitrogen, phosphorus, and potash fertilizers are mixed in proportions to be used as seed fertilizers. Peanuts should be seeded and fertilized in the application of seed fertilizers to prevent burning of seed and nitrogen fertilizers should be applied before and after the seedlings. Spraying foliar fertilizers at the seedling stage, flowering stage and fruiting stage, such as spraying 0.1?0.2% potassium dihydrogen phosphate solution, can prevent premature aging to a certain extent, promote the development of follicles, and improve the yield and quality of peanuts.
Third, the amount of fertilizer
The specific fertilizing amount should be based on the yield and fertility and peanut fertilization principles to use fertilizer.
1. Achieve the target yield of peanut nutrient requirement (see the following table)
To achieve the target yield peanut nutrient requirement
The target yield of urea is the amount of ammonium phosphate used in the amount of ammonium phosphate
(kg/mu) (kg) (kg) (kg)
300 11 13 23
400 14 17 26
500 17 20 30
2, the general field available zinc: 2kg / acre; boron: 2 kg / acre; iron: 2 kg / acre.
3. The yield of coated peanuts is high, so it is necessary to increase the fertilization by about 20% from the general land mass.
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