Vegetable fertilizer characteristics and fertilization points

Cabbage vegetables, such as Chinese cabbage, large green vegetables, small green vegetables, black and white vegetables, and rapeseed, are primarily leafy crops. Their main edible parts are the leaves, which have a large surface area and high transpiration rates. However, these plants typically have shallow root systems, making them more dependent on consistent soil moisture and nutrient availability. To achieve high yields, it's essential to maintain high soil fertility, especially with sufficient nitrogen throughout the growth cycle. In the later stages of growth, adequate phosphorus and potassium should be applied, along with trace elements like iron, calcium, zinc, boron, and manganese. Copper is required in smaller amounts. Applying a 0.25% to 0.5% calcium nitrate solution through foliar sprays can effectively reduce dry heartburn caused by calcium deficiency in Chinese cabbage. Green leafy vegetables, including spinach, lettuce, celery, leeks, and herbs like sage and parsley, mainly use soft leaves, petioles, or stems as their edible parts. These crops grow quickly with shallow roots, requiring high nutrient input. For example, celery, measured in tons of product, absorbs approximately 2.55 kg of nitrogen, 1.66 kg of phosphorus pentoxide, and 3.67 kg of potassium oxide, with an absorption ratio of 1:0.5:1.4. Potassium plays a key role in thickening and strengthening the petioles, improving both yield and quality. Calcium deficiency can lead to heart rot in celery, while spinach is sensitive to copper, silver, and zinc deficiencies. Lettuce, on the other hand, is prone to zinc, copper, and molybdenum deficiencies. Spraying a multi-micro fertilizer can help improve yields and prevent nutrient-related issues. Solanaceous vegetables, such as tomatoes, eggplants, and sweet peppers, are fruit-bearing crops. Their growth involves flower and fruit development, so they require balanced nitrogen, phosphorus, and potassium, along with micronutrients like calcium, iron, manganese, and zinc. A typical tomato crop requires about 3.18 kg of nitrogen, 0.74 kg of phosphorus pentoxide, and 4.38 kg of potassium oxide per ton, with a ratio of 1:0.5:1.5. Spraying a 0.5% calcium oxide solution during fruit setting helps control umbilical rot and improves fruit firmness, aiding in storage and transport. Tomatoes are also sensitive to iron, manganese, and zinc deficiencies, so early application of multi-micro fertilizers is recommended to avoid yellowing, mottled leaves, and other physiological disorders. Melon vegetables, including cucumber, pumpkin, zucchini, watermelon, loofah, bitter gourd, and chayote, are all fruit-bearing crops. They benefit from proper phosphorus and potassium applications, along with micronutrients like manganese, copper, and calcium. Cucumbers, for instance, absorb around 4.1 kg of nitrogen, 2.3 kg of phosphorus pentoxide, and 5.5 kg of potassium oxide per ton, with a ratio of 1:0.6:1.3. They are particularly sensitive to manganese and copper deficiencies, and early foliar application of multi-micro fertilizers can significantly boost yield. Author: Chen Maochun Source: Science and Technology Information 【Comment】 【Print this article】 【Close this page】 【Large, medium and small】

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