How to fertilize zucchini?

How to fertilize zucchini? Please describe in detail the following methods for fertilizing zucchini: first, growth characteristics: zucchini have a strong root system It has strong resistance to low temperature and weak light, it has strong water absorption and drought resistance, and it can grow well on sand, loam or clay, and it has high yield, relatively mild disease, long harvest period and high benefit. Second, the law of fertilizer demand: large amount of fertilizer, production of 1000kg commercial melon, fertilizer equivalent to nitrogen 3.9-5.5kg, phosphorus pentoxide 2.1-2.3kg Potassium oxide 4-7.3kg. Third, the main points of fertilization: the fertilization of zucchini should be based on organic fertilizer, and attention must be paid to the supply of phosphorus and potassium fertilizer, especially in the melon-bearing period. Re-apply base fertilizer, zucchini stubble cultivation, in order to prevent winter low temperature topdressing not timely de-fertilization, should apply sufficient base fertilizer, in the case of no previous crop occupation, water before soil preparation. When the soil is suitable for ploughing, 5000ml 7000kg of high quality mature organic fertilizer, 30kg of diammonium 30kg, 30kg of urea, 20ml 30kg of potassium sulfate or potassium nitrate are applied per mu, and the depth is 30cm. After fertilization, the roasted land is closed and heated for 5mu for 7 days and then planted. Sulfur or chlorothalonil smoke fumigant can also be used for fumigation and sterilization. Skillful application of topdressing: watering the seedlings in time, combined with watering can apply 10 kg urea per mu with the water, and then control the water to squat the seedlings. Entering the melon-bearing period, which is also a period of low temperature in winter and unfavorable to the growth of melon seedlings, vegetative growth and reproductive growth are carried out at the same time, and balanced fertilization is the key to coordinate the relationship between them. When the root melon begins to expand, it is combined with watering for the second topdressing, applying diammonium 1520kg per mu or nitrogen, phosphorus and potassium compound fertilizer 10kg / mu. When topdressing, the fertilizer is first dissolved in water and then irrigated in the hidden trench under the plastic film. After irrigation, the plastic film is sealed to strengthen the ventilation and dehumidification. In the full fruit period, fertilizer and water management is very important. Zucchini harvest frequency is high, each plant can harvest 7 Mel 9 fruits. Topdressing once in 15 days, each time, urea or ammonium sulfate 20 kg per mu, or nitrogen, phosphorus and potassium compound fertilizer 35 kg, or cake fertilizer retting fertilizer solution, fully mature human feces and urine 10 times dilution 400 500 kg per mu. Alternating application of chemical fertilizer and organic fertilizer is the best. At the same time, 0.1% urea plus 0.2% potassium dihydrogen phosphate plus 100 times sugar water or foliar fertilizers such as Aiduoshou and Yemanbao were alternately sprayed to make up for the deficiency of nutrient absorption by roots. In the later stage of melon fruiting, the plant senescence, the amount of fertilizer should be reduced appropriately. In addition to the above fertilization, special attention should be paid to the application of carbon dioxide gas fertilizer. Generally choose sunny morning about half an hour after sunrise, when the temperature rises to 15 ℃, apply CO2 gas fertilizer with a concentration of 1000-1300 mg / L, once every 3-5 days, 2 hours each time, which can increase the fruit setting rate and prolong the fruiting period. Click to get more zucchini planting techniques click to get more vegetable planting techniques