1. Characteristics of fertilizer requirement: Melon needs a large amount of fertilizer, and the nutrient absorption is the least at the seedling stage. After the flowering, the absorption of nitrogen, phosphorus and potassium gradually increases. The peak of nitrogen and potassium absorption is about 16 to 17 days after fruit setting. It fell sharply in 26 to 27 days. The peak of phosphorus and calcium absorption is 26 to 27 days after fruit setting and continues until the fruit matures. It takes about one month from the flowering to the end of the fruit expansion period, which is the period in which melon absorbs the most mineral nutrients and is also the maximum efficiency period of fertilizer. Calcium and boron not only affect the sugar content of the fruit, but also affect the appearance of the fruit. When the calcium is insufficient, the surface of the fruit is rough and white, and the brown meat is prone to brown spots when boron is absent. Melon is a chlorine-free crop, and it is not advisable to apply ammonium chloride or potassium chloride.
2. Fertilization technology: Under the medium fertility level, the fertilization amount of melon in the whole growth cycle is 3000-3500 kg of organic fertilizer (or 400-450 kg of commercial organic fertilizer), 18-21 kg of nitrogen fertilizer, 6-8 kg of phosphate fertilizer, and 8-10 potassium fertilizer. kilogram. Organic fertilizer is used as base fertilizer, nitrogen and potassium fertilizer are divided into base fertilizer and three times of topdressing. Phosphate fertilizer is applied in all bases, and fertilizer and farmyard manure (or commercial organic fertilizer) are mixedly applied. Base fertilizer: The base fertilizer is mainly organic fertilizer, with appropriate quantitative fertilizer. Generally, the farmer's fertilizer is 3000-3500 kg or commercial organic fertilizer 400-450 kg, urea 5-6 kg, diammonium phosphate 13-17 kg, and potassium sulfate 5-6 kg. Topdressing: Topdressing and topdressing: 9-10 kg of urea and 3-4 kg of potassium sulfate. At the beginning of fruit expansion: 12-14 kg of urea and 4-6 kg of potassium sulfate. Fruit-expanding mid-term topdressing: 9-10 kg of urea and 3-4 kg of potassium sulfate. Top dressing: After the fruit setting, spray 0.3% potassium dihydrogen phosphate solution every 7 days or so, and spray 2 or 3 times.
Huaxian Liu Huimin
2. Fertilization technology: Under the medium fertility level, the fertilization amount of melon in the whole growth cycle is 3000-3500 kg of organic fertilizer (or 400-450 kg of commercial organic fertilizer), 18-21 kg of nitrogen fertilizer, 6-8 kg of phosphate fertilizer, and 8-10 potassium fertilizer. kilogram. Organic fertilizer is used as base fertilizer, nitrogen and potassium fertilizer are divided into base fertilizer and three times of topdressing. Phosphate fertilizer is applied in all bases, and fertilizer and farmyard manure (or commercial organic fertilizer) are mixedly applied. Base fertilizer: The base fertilizer is mainly organic fertilizer, with appropriate quantitative fertilizer. Generally, the farmer's fertilizer is 3000-3500 kg or commercial organic fertilizer 400-450 kg, urea 5-6 kg, diammonium phosphate 13-17 kg, and potassium sulfate 5-6 kg. Topdressing: Topdressing and topdressing: 9-10 kg of urea and 3-4 kg of potassium sulfate. At the beginning of fruit expansion: 12-14 kg of urea and 4-6 kg of potassium sulfate. Fruit-expanding mid-term topdressing: 9-10 kg of urea and 3-4 kg of potassium sulfate. Top dressing: After the fruit setting, spray 0.3% potassium dihydrogen phosphate solution every 7 days or so, and spray 2 or 3 times.
Huaxian Liu Huimin
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
Crash Helmet,Bulletproof Helmet,Ballistic Helmet
Dacheng Advanced Material Co., Ltd. , http://www.bullet-proofs.com