What are the key points and matters needing attention of fertilization techniques for seedlings?

Fertilizer is indispensable in the process of seedling planting, so as to meet the nutrients needed for its growth, especially in the period of exuberant growth. Next, let's take a look at the key points of seedling fertilization technology and what matters needing attention?

What are the key points of fertilization techniques for seedlings?

1. Fertilize according to soil conditions.

Sandy soil is poor in fertilizer conservation, and it is easy to apply a small amount of organic fertilizer for many times, and cold fertilizer such as pig and cow manure is better; clayey soil, with poor ventilation and low temperature, can appropriately increase the amount of manure thermal fertilizer such as horse and sheep. In addition, the acidity and alkalinity of the soil should be adjusted by fertilization according to the acidity and basicity of the fertilizer.

2. Master the weather conditions and apply fertilizer

The fertilization of seedlings should be selected when the weather is sunny and the soil is dry, which is beneficial to the absorption of seedling roots. In overcast and rainy days, due to the slow absorption of water by seedling roots, not only nutrients are not easily absorbed, but also fertilizer is easily washed away by Rain Water, resulting in waste.

3. Fertilizing according to the characteristics of fertilizer.

The mobility of nitrogen fertilizer in the soil is strong, and the shallow application permeates into the root distribution layer, which is easy to be absorbed by seedlings; the mobility of potassium fertilizer is poor, and the mobility of phosphate fertilizer is even worse, so it is appropriate to apply deeply to the root distribution of seedlings. When fertilizer is used as base fertilizer, the effect of fertilizer is slow, so it should be applied deeply, and if topdressing is effective, it should be applied shallowly.

4. Select suitable kinds of fertilizers

The fertilizer applied is usually quick-acting fertilizer or rotten human feces and urine. The kinds of available fertilizers used in nursery land are urea, liu ferric acid, ammonium chloride, potassium chloride, guo calcium phosphate and so on. Chemical fertilizer must be completely crushed into powder and should not be used in pieces.

Ammonium bicarbonate is avoided in nurseries where grass flowers are cultivated, because this fertilizer is highly volatile, especially at high temperature, and the ammonia volatilized is easy to burn the leaves of grass flower seedlings. If a large amount of ammonium bicarbonate is applied, it will also make the seedlings grow tender and reduce the stress resistance.

5. Fertilizing according to the characteristics of seedling fertilizer requirement.

The fast-growing period is the most exuberant period for seedling growth, which needs the most fertilizer and water, which can increase the amount and times of nitrogen fertilizer, and apply phosphorus and potassium fertilizer in proportion to promote nitrogen absorption and seedling growth. During the hardening period, the aboveground and underground parts of seedlings are gradually Lignified, so it is necessary to prevent overgrowth, stop applying fertilizer and improve the resistance of seedlings.

II. Matters needing attention in fertilization of seedlings

Organic fertilizer should be fully fermented to avoid root burning. At the same time, after the fertilizer is mature, it will kill the diseases and insect pests of the fertilizer and miscellaneous grass seeds, which will not bring adverse consequences. Chemical fertilizer must be completely crushed into powder and diluted with water before use.

Choose sunny days and dry soil fertilization, rainy days or the soil is too wet, fertilizer and water is easy to lose, resulting in waste, after fertilization, especially after the application of chemical fertilizer must be properly irrigated, so that fertilizer infiltration into the soil, otherwise it will cause excessive concentration of soil solution and root damage.

The final period of fertilization should not be too late to prevent the current year-old branches of seedlings from being damaged by freezing when they are too late for Lignification.

Urban seedling fertilization should pay attention to hygiene, fertilizer should not pollute branches and leaves; it is forbidden to apply fertilizer at noon in summer (it should be carried out in the morning and evening) so as not to burn the roots; it is better to apply fertilizer at noon in winter.