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According to the output of 6672000kg per 667m2 of bitter gourd, when the soil available phosphorus nutrient level is low (fast-acting phosphorus<30mg/kg), the total phosphorus application per 667m2 (p205) is 9.5}15.0kg, equivalent to 79925kg of superphosphate; when the soil Phosphorus nutrient grade is medium (rapid phosphorus 3075m sand g), total fertilizer application (P205) fertilizer is 8.09.5kg, equivalent to superphosphate 6679kg; when soil phosphorus nutrient grade is high (fast-acting phosphorus 75120mg/kg), the whole period The phosphorus application rate (P205) is 7.58.0kg, which is equivalent to 62.566kg of superphosphate. When the soil phosphorus content is extremely high (rapid available phosphorus> 120mg/kg), the total application of phosphorus (P205) fertilizer is <7.5kg, equivalent Superphosphate <62.5kg. According to soil composition analyzer soil nutrient value control soil phosphorus nutrient abundance index and bitter gourd phosphorus fertilizer recommended technical indicators, adjust the specific amount of fertilizer.
The analysis of the soil nutrient status by means of a soil composition analyzer revealed that it is generally not necessary to additionally apply medium and trace element fertilizers if sufficient organic fertilizer is applied in the base fertilizer. However, when the available magnesium in the soil is extremely deficient (exchangeable magnesium content <100mg/kg), which may affect the yield, it may be considered to apply medium-sized elemental magnesium fertilizer as appropriate [[5J, the total amount of magnesium fertilizer applied per 667m2 is 0.40.8kg, disassemble and disassemble magnesium sulfate 7S (containing Mg 9.8%) 4.08.0kg; when the available boron in the soil is extremely low (effective boron content is less than 0.5m sand g) so as to affect the yield, consider applying micro amounts as appropriate. For elemental boron fertilizer, the total application of boron (B) fertilizer is 0.050.1kg, and borax (including B11%) is 0.450.9kg; when the soil is ineffective, (the effective key content is less than 0.1m sand g), which affects the yield. Under the circumstances, microelement key fertilizer may be considered as appropriate. The total amount of key fertilizer (Mo) is 0.0080.010g, and the amount of molybdenum (including Mo54%) is 1518g.
Application of Soil Composition Analyzer in Exploring the Technical Regulation of Bitter Gourd Due to Soil Fertilization
The bitter gourd is very popular for its nutritional value and it is also an important melon cultivar in southern China. To ensure the production and quality of melon vegetables, reduce the pollution caused by fertilization and promote the industrialization of vegetable production The discussion of technical regulations is very necessary. This requires the application of organic fertilizers, inorganics, etc., from the environmental requirements of production areas, fertilization requirements, fertilization standards at all levels of soil nutrient fertility, and fertilization time, etc., due to the application of soil fertility, basic fertilizer, and top dressing. The technical specifications for nitrogen, phosphorus, potassium, boron, and molybdenum fertilizers also regulate the fertilization behavior of the bitter gourd planting process. According to soil nutrients, the soil composition analyzer must be used to analyze the composition of the soil in order to make the most accurate method.