Fertilization time and fertilizer seed, the best time to fertilize

What kind of plants are you referring to, flowers or crops?

As the saying goes, "gold in autumn, silver in winter", the same is fertilization, but the same input, fertilization period of different effects are quite different, with the increase of autumn rain, timely application of autumn fertilizer to fruit trees has a great effect.

The suitable application time for autumn fertilizer is after the beginning of autumn and before the frost falls, usually the earlier the better. Because after the beginning of autumn, the photosynthetic ability of tree leaves is strong, which is conducive to the synthesis of organic nutrients. However, after the frost falls, the leaves are about to wither, and the photosynthetic capacity becomes poor.

Without photosynthesis, it is difficult to convert inorganic nutrients into organic nutrients, and the fertilizer utilization rate is not high.

What fertilizer to apply

1. Organic fertilizer: focus on increasing the organic matter of the soil, improving the fertility of the soil, and improving the utilization efficiency of chemical fertilizer.

2. Microbial agents: mainly rely on the physiological and metabolic activities of microorganisms to promote the release of organic fertilizers, fertilizers and mineral nutrients in the soil. The secondary metabolites of microorganisms contain more amino acids and other substances, which can effectively improve the quality and resistance of crops.

3. Biological organic fertilizer: It is a product with both microbial fertilizer and organic fertilizer effect, which contains not only functional microorganisms, but also a certain amount of organic matter and nutrients.

4. Compound microbial fertilizer: live microbial products that can provide, maintain or improve plant nutrition, increase the yield of agricultural products or improve the quality of agricultural products. Compound microorganisms are the most practical ternary biological fertilizers at present.

According to the different fertilization time, it can be divided into basal fertilizer and top dressing, and according to the different fertilization modes, it can be divided into sprinkling, flushing, hole application, strip application, etc.; Scattering and flushing are conducive to the diffusion of nutrients and are convenient to apply, but the nutrient loss is large and the utilization rate is low.

The nutrient loss of acupuncture and strip application is small and the utilization rate is high, but it consumes a certain amount of mechanical energy; With the development of modern precision agriculture, precision fertilization has also developed rapidly and will become an important fertilization mode.

Fertilization is mainly based on soil fertility level, crop type, target yield, climate and environment, and fertilizer characteristics, so as to select the appropriate fertilizer, estimate the amount of fertilizer required, and determine the fertilization time and fertilization pattern.

Answer: 3-5 kg of urea per mu 5 days after cauliflower planting, apply fast-acting fertilizer diligently and thinly 4-5 times during the growth period, increase the amount of fertilizer during the formation of flower bulbs, especially increase phosphorus and potassium fertilizer, use fertilizer 1-2 times before the amount, 5 kg of urea per mu each time, cauliflower top dressing must be combined with watering, foliar spraying seaweed fertilizer, with the effect of disease resistance and increased yield.

Fertilization should be done in mind. In winter, the temperature is low, the plant grows slowly, and most flowers are in a state of growth stagnation, and generally no fertilizer is applied; Spring and autumn are in the peak period of flower growth, roots, stems, leaves grow, flower buds differentiation, young fruit expansion, all need more fertilizer, should be appropriately applied more top dressing; In summer, the temperature is high, the water evaporates quickly, and it is the vigorous growth period of flowers, so the concentration of top dressing should be small, and the number of times can be more.

1. Apply basal fertilizer. Fruit trees are often fertilized immediately after fruit picking, and basal fertiliser is applied before fruit picking for high-yielding or late-maturing varieties. The specific time is 9 to 10 months in autumn, the whole garden turns the soil 20 30 cm deeply, removes the weeds and debris in the garden, and destroys it together with the pruning branches.

The ditch is 30 cm deep and 20 cm wide outside the tree tray, and 2000 kg of organic fertilizer is applied per mu and 100 kg of special fertilizer for fruit trees.

2. Fruit tree covering. Combined with fertilization, cover the fruit tree tray with 5 10 cm thick straw; For fruit trees with poor light transmittance, the fruit coloring requirements are higher, and the tree tray can be covered with silver reflective film.

The best time to apply fertilization depends on the species of plants being planted and the local climatic conditions. In general, the best time to fertilize is before the plant growth and flowering periods, which are usually spring and autumn. This is when plants need more nutrients to promote their growth and development.

In the spring, when the soil temperature rises and the plants begin to grow, some nitrogen fertilizer can be applied to promote the growth of the plant's leaves. During the summer months, when the plants start flowering and bearing fruit, some phosphate and potassium fertilizers can be applied to help the plants form flowers and fruits. In the fall, when the plants enter the dormant period, some organic fertilizer can be applied to provide nutrients to the soil so that the next growing season can be shortened.

It should be noted that the principle of appropriate fertilization should be observed when fertilizing and excessive fertilizer should be avoided so as not to have a negative impact on the plant and the environment. At the same time, it is also important to choose fertilizers that are suitable for the plant species and local climatic conditions.

If it is a newly planted seedling, it is not suitable to fertilize immediately after planting. After the seedlings survive (manifested as growing new roots and sprouts) there are 2-3 new leaves, organic fertilizer can be applied thinly, and fertilizer topdressing can be carried out after the seedlings grow normally, a small number of times, and the normal dose of topdressing can be carried out regularly after the growth enters the vigorous period, generally 25-30kg mu.

1. Planting time.

Poppies prefer warm growing conditions, and the best time to sow seeds is in spring or autumn. It depends on the region, but in the northern region, the best time to sow seeds is in the spring, so that the flowers will bloom around July after planting. If you are in a warm region in the south, you can choose to sow seeds around September to October in autumn, so that the flowers will bloom around April in the following spring.

Second, land selection and land preparation.

Poppies are very light-loving plants, and in order to ensure their normal growth, they should choose a plot with plenty of sunlight and easy drainage. It is best to plough the land once before planting to ensure that the soil is soft and delicate, which is conducive to the later germination of seeds.

3. Sowing method.

Poppy seeds are relatively small, and it is best to water them thoroughly before planting to avoid watering and washing away the seeds after planting. It is best to mix the seeds with the sand before sowing and then spread them on the surface of the soil. After the seeds are sprinkled, cover them with a thin layer of soil so that the seeds will sprout quickly.

Depending on what kind of seedlings you have, for example, newly planted seedlings can be fertilized five months after planting. Before planting, you can apply some fertilizer at the bottom of the pit as base fertilizer, and then fertilize before the tree germinates in the next year, and you can also use inorganic fertilizer or manure to irrigate, and the distance can not be too close to the sapling, otherwise it will burn the rhizome of the sapling.

Plants should be fertilized during their growth and vegetative and reproductive periods.

Generally, nitrogen fertilizer is the main fertilizer in the vegetative growth period, and phosphorus and potassium fertilizer is the main fertilizer in the reproductive stage. Moreover, the timing of fertilization is best in the period when the substrate is slightly dry and the growth is vigorous, when the fertilizer absorption rate is high, and the demand and strong fiber are also large.

Plant fertilization cannot be applied when the plant lacks nutrients, and the fertilizer must be supplemented at the time when there is no shortage of fertilizer, otherwise it will be disjointed. Fertilization should be applied in the morning according to the time period of the day, and after fertilization, it should be watered once permeable, which is conducive to the dilution and decomposition of fertilizer and the absorption of plants.

Fertilization: When the soil cannot provide the nutrients needed for the growth and development of crops, the act of artificially supplementing crops with nutrients is called fertilization. Increase soil nutrients: Soil nutrients can be increased by applying organic or inorganic fertilizers.

Most of the inorganic fertilizers are easy to dissolve, and crops can absorb them immediately after application, except for part of the soil absorption and storage. Except for a small amount of nutrients that can be directly absorbed by crops, most of the organic fertilizers must be decomposed by microorganisms before crops can be utilized.

In recent years, many farmers will choose to grow their own vegetables to meet the needs of family diet, planting vegetables need to do a good job of management measures, such as fertilization is a very important work, the following is a detailed understanding of leafy vegetables, eggplant vegetables, root vegetables and precautions.

1.Leafy vegetables leafy vegetables can be fertilized a week after planting, because leafy vegetables have high requirements for soil quick-acting nutrients and are more sensitive, if there is a lack of nutrients, there will be a slowdown in leaf growth, and the leaves will turn yellow, so in the leafy vegetables to be topdressed in time, every 15-30 days you need to apply farmhouse fertilizer.

2.Nightshade vegetablesWhen nightshade vegetables grow to 3-4 leaves, they can be fertilized. In the seedling stage, more nitrogen fertilizer is needed, but too much nitrogen fertilizer will cause the plant to grow, so pay attention to the amount of nitrogen fertilizer.

After entering the growth period, the demand for phosphate fertilizer of nightshade vegetables increases, so it is necessary to reduce the application of nitrogen fertilizer and focus on increasing the application of phosphorus fertilizer and potassium fertilizer. When the fruit is done, it needs to be supplemented with fertilizer water after each harvest.

3.Root vegetablesWhen the root vegetables grow to 4-5 cm, you can apply fertilizer for the first time. It needs to be fertilized with more nitrogen fertilizer in the early stage of growth, as this can promote the growth of the leaves.

Potassium fertilizer needs to be applied in the middle and late stages of growth, and the amount of nitrogen fertilizer needs to be properly controlled at this time, because too much nitrogen fertilizer in the later stage will lead to the growth of vegetables, the yield will decrease, and the quality will deteriorate.

4.Precautions When fertilizing, you need to pay attention to the fertilizer should be far away from the roots, otherwise it is easy to cause root burns. If there are enough nutrients in the soil, you need to reduce the number of fertilizations.

For plots with soil pH less than 5 in vegetable plots, 50-100 kg of quicklime or 50-100 kg of soil conditioner should be sprinkled per mu one week before planting to increase soil pH and supplement calcium. When the symptoms of molybdenum deficiency appear in the middle and late stages of vegetable growth, foliar spraying with ammonium molybdate aqueous solution (can also be mixed with pesticides), sprayed once every 5-6 days, sprayed twice.

Generally speaking, fertilization is applied during the growing season of flowers, and vigorous flowers need more fertilizer; Vegan fertilizer was applied at the seedling stage, phosphorus fertilizer was mainly applied at the flowering and fruiting stage, nitrogen fertilizer was used for foliage flowers, and fertilization was stopped for flowers in the dormant stage. In addition, it is necessary to grasp the principle of "thin fertilizer and diligent application", that is, "eat less and eat more". It is best to apply a thin fertilizer water in about 10 days during the growth period of flower seedlings, and the best fertilization effect is in the evening, and fertilizer should not be applied around noon, because the soil temperature is high and the roots are easily injured.

Organic fertilizer should be fully decomposed before it can be applied. In recent years, the fertilizer efficiency of controlled-release fertilizer can reach half a year or even longer, and its one-time application rate can be greater than that of water-soluble fertilizer, and the gradual release of nutrients can meet the nutrient needs of flowers for a longer time.