The season of fertilization, what season of fertilization

Fertilization requirements for different seasons:

Spring fertilization: There are two forms of fertilization in spring: one is overwintering or early spring crop topdressing; The second is to apply base fertilizer for spring-sown crops.

Crops to be sown (planted) that can be fertilized in advance, such as corn, peanuts, sweet potatoes, sorghum, vegetables, etc., 10 to 15 days before sowing are fertilized to help crop growth, and it is easy to obtain seedlings and seedlings.

Summer fertilization: Generally, the summer temperature is high, the fertilizer efficiency is high, the fertilizer efficiency is fast, and it is easy to cause fertilizer damage, so the amount of fertilizer should be small. Fertilization can be fertilized with water, that is, with watering or fertilization after rain, which can improve fertilizer efficiency. Avoid the storm time and get up early and late in the evening.

Autumn fertilization: Temperatures are still high in early autumn and fertilization techniques are equivalent to those in summer. Under the conditions of facilities, the amount of base fertilizer should be appropriately reduced for planting tomatoes, green peppers, cucumbers and other vegetable varieties after autumn, which is equivalent to half of spring planting and one-third of winter planting. Late autumn.

When the temperature drops, sowing (planting) and fertilizing is equivalent to spring.

Winter fertilization: The core is "fertilizer to protect seedlings, water to adjust fertilizer, temperature to promote control" under low temperature conditions, crop fertilizer absorption capacity decreases, fertilizer efficiency is low, slow effect, not easy to occur fertilizer damage, increase the amount of fertilizer can promote crop fertilizer absorption, improve plant body fluid concentration and soil solution concentration.

Enhance the cold resistance of crops, ensure fruit setting and fertilizer ratio under low temperature and low light conditions.

Spring fertilization is 30-40% higher.

The season of fertilization depends on the type of plant. For example, shrubs are suitable for summer fertilization, crop plants are suitable for spring fertilization, and tree plants are mostly fertilized in autumn.

There are two forms of fertilization in spring: overwintering, topdressing for early-spring crops, and bottoming for spring-sown crops. The core of winter fertilization is:"Fertilizer to protect seedlings, water to fertilizer, temperature to promote control", the amount of fertilization is 30-40% higher than that of spring fertilization.

Fertilization in the month and season should be divided into "seasons", and the fertilization skills and methods in the four seasons are different.

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.

Different kinds of plants have different requirements for fertilizer, the fertilization season of trees is mainly concentrated in the autumn, and the plants of crops are generally given sufficient base fertilizer environment in spring, so as to ensure the normal growth of plants, and the fertilization of shrub plants is mainly concentrated in summer and before flowering, at this time nitrogen and phosphorus fertilizer should be reduced.

Different plant fertilization methods are also different, so what is the best season for tree plant fertilization, in fact, it is best to top dressing after autumn, so that the plants can grow better in the coming year, mainly in the spring to apply sufficient base fertilizer, mainly organic fertilizer, compound fertilizer is applied in summer according to the growth trend, and the number of fertilization can be appropriately increased in autumn.

General crop plant fertilization to give sufficient base fertilizer environment before planting, can be used in spring sowing time to apply bottom fertilizer, mainly organic fertilizer and superphosphate mixed fertilizer, summer can be applied thin urea or cake fertilizer solution, autumn and winter appropriate reduction on the line, fertilization can be added to the appropriate amount of herbicides.

Shrub plants are also divided into many species, such as the fertilization of tree species on both sides of the road to nitrogen fertilizer-based, the fertilization season is mainly in summer, generally grow tall trees, grow vigorously in March and June, mainly to apply liquid fertilizer, early spring flowering plants should be fertilized half a month before flowering, fertilization after flowering is mainly based on nitrogen fertilizer, and the amount of nitrogen fertilizer and phosphorus fertilizer should be reduced in summer.

Succulent plants do not have a very large demand for fertilizer, generally try to apply as little nitrogen fertilizer, fertilization is mainly carried out in autumn, in the summer high temperature during the semi-dormant or dormant state, at this time should stop fertilization, autumn can be applied every 2 3 weeks liquid fertilizer, most of the succulents can be applied once a month during the growth period.

Herbaceous plant fertilization should be carried out according to the needs of different plants for fertilizer, most of them are concentrated in spring and summer fertilization every year, at this time it is also the fastest growing period, spring and summer fertilization is mainly based on liquid fertilizer, fertilizer in late autumn do not apply nitrogen fertilizer, and fertilization can be stopped in winter.