One, tomatoes need fertilizer characteristics
Tomatoes need more fertilizer and are resistant to fat. Seedling stage is dominated by nitrogen nutrition. At the beginning of the first ear fruit, the absorption of nitrogen, phosphorus and potassium rapidly increases. At this time, nitrogen fertilizer is the main component; when the result is at peak stage and the harvest begins, potassium fertilizer is the main component. From the beginning of fruit setting, the amount of potassium needed to increase linearly, and the amount of potassium absorbed during fruit enlargement reached its maximum value. Until the late harvest, the absorption of potassium decreased slightly.
Second, tomato fertilization method
1. Apply base fertilizer during planting period. Tomato is a vegetable that needs more fertilizer. It is necessary to apply base fertilizer before planting. Basal fertilizer is mainly composed of organic fertilizer with good quality, and it is equipped with a small amount of phosphorus and potassium fertilizer.
2, fertilization period. When the tomato seedlings grow to 5-6 leaves, they can be sprayed with foliar fertilizer if the leaf color becomes light. During the vigorous season, it is sprayed once every 10 days or so. In addition, foliar spray fertilizer can be combined with pest control.
3, the results of timely fertilizer. When the first fruit begins to enlarge, nitrogen fertilizer is applied in combination with watering. The first fruit was nearly harvested, and when the second and third crushed were oversizing, the second and third fertilization were performed respectively. In the full fruit period, extra-root topdressing can be combined with spraying, which is beneficial to the improvement of fruit coloring and quality.
Third, tomatoes reasonable fertilizer
1, this period of time before the tomatoes are planted until the fruit set, should see seedlings fertilizer, control the amount of fertilizer. If the top dressing is too much and too concentrated, it can easily cause the plants to grow in length, and even cause the flowers to fall. Therefore, in addition to the case of a serious lack of fertilizer plants, generally should control the amount of fertilizer, slightly applied diluted fecal water or biochemical fertilizer can be.
2. Tomatoes should be top-dressed during the young fruit and harvest period to promote their growth and development. Fast-acting fertilizers should be quickly followed once or twice in the first ear fruit to walnut size to ensure that the plant does not de-fertilize. When the young fruit enters into the bulge, in order to meet the needs of plant growth and avoid the later defertilization, the method of diligent chase should be adopted. Usually, the fertilizer is applied every 10 days in sunny days.
3. The tomato not only absorbs nutrients from the soil from the roots, but also can absorb mineral nutrients from the leaves to promote the development of fruits and seeds. Therefore, when the fruit grows, especially in the early period of continuous rain, it is not possible to apply fertilizer to the soil. Spray the fertilizer 2-3 times.
4, the tomatoes bogey bogey in the soil more humid and noon high temperature conditions, and avoid too concentrated fertilizer. Concentrated fertilization can make the plants prolonged and produce fertilizer damage; in the case of soil moisture, fertilization can easily cause physiological diseases such as falling flowers, fallen leaves and fruit droppings; under high temperature conditions, fertilization can be brought about by the large amount of water evaporation of the leaves of plants. In addition, the fertilization time should avoid the high temperature period, early morning or evening is appropriate.
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