What kind of fertilizer should be applied to roses

Roses should be fertilized with fertilizers containing nitrogen, phosphorus, potassium and trace elements, which can make the leaves of roses flourish, the leaves of roses grow red, promote the formation of buds, and the roots of roses are more developed. it can also promote the new shoots and tender leaves of roses, increase the number and resistance of flowers, and make their healthy growth and development.

First, what kind of fertilizer should be applied to roses

1. Nitrogen fertilizer

The main results are as follows: (1) the application of nitrogen fertilizer is the most important to the nutrients of rose planting and affects the growth and yield.

(2) proper amount of nitrogen fertilizer can make the leaves of roses grow luxuriantly, and the leaves of roses grow red.

(3) when the nitrogen fertilizer is insufficient, the rose will become relatively thin, resulting in slow growth cycle and yellowing leaves.

(4) when there is too much nitrogen fertilizer, roses are easy to grow branches, flowers are less loose, and even flowers are deformed.

2. Phosphate fertilizer

In autumn, pay attention to supplement phosphate fertilizer as base fertilizer, phosphate fertilizer can promote flower buds, leaf fertilizer, colorful flowers, developed roots, lack of phosphate fertilizer, roses will branches weak, flowers drooping.

3. Potash fertilizer

The application of potash fertilizer can not only promote new shoots and tender leaves, increase the number of flowers, make their buds full and contain high content of rose oil, but also prevent diseases and pests.

4. Trace elements

In addition to nitrogen, phosphorus and potassium, it is necessary to add appropriate amounts of trace elements such as iron, boron, manganese and zinc to assist. When the trace elements are insufficient, diseases are easy to occur, resulting in green loss of leaves, organ deformities, and the growth and development of roses will be affected.

II. Requirements for fertilization of roses

1. Urea

Urea is generally applied in ditches or holes as topdressing, the amount of fertilizer is 10-15kg/ mu, 3-4 times per year, 5-7 days effective, sandy soil application for a small number of times, watering in time after application.

2. Ammonium bicarbonate

The main results are as follows: (1) ammonium bicarbonate, that is, ammonium bicarbonate, is a kind of available nitrogen fertilizer, which will not solidify the soil for a long time, so it is widely used in production.

(2) general ditch or hole application as topdressing fertilizer, the amount of fertilizer application is 10-20kg/ mu, 3-4 times per year, and the effect is about 2 days.

(3) however, because of its fast volatilization and easy dissolving characteristics, it is appropriate to apply a small amount of it for many times, cover the soil and water in time after application, avoid sprinkling on the ground, so as to avoid leaf contamination and burns.

3. Calcium superphosphate

The main results are as follows: (1) calcium superphosphate is usually mixed with soil fertilizer in autumn, which can accelerate the fertilizer effect. Generally, the furrow is used as base fertilizer, and the amount of fertilizer is 30-50kg/ mu.

(2) crushed or mashed when used to avoid soil hardening and burning the root system, the foliar spraying effect of 1% superphosphate extract can be used in the late autumn growth.

4. Calcium, magnesium and phosphorus

Calcium magnesium phosphate fertilizer is basically similar to calcium superphosphate in properties, usage and dosage, and the effect is even better. Calcium magnesium phosphate fertilizer is not corrosive, does not absorb moisture and does not agglomerate, so it is widely used.

5. Potassium sulfate

The main results are as follows: (1) the mobility of potassium sulfate in soil is small, and it can be used as base fertilizer or topdressing fertilizer in general.

(2) however, long-term application is easy to solidify, and the effect of adding organic fertilizer as base fertilizer will be better, the amount of fertilizer application is 10-15kg/ mu, once a year.

(3) 0.5% potassium sulfate topdressing before bud appearance of rose is the best, which can significantly increase yield, have a certain corrosiveness, avoid leaf burn, avoid mixed application with nitrogen fertilizer and calcium superphosphate, and reduce fertilizer efficiency.

6. Potassium chloride

Potassium chloride is basically similar to potassium sulfate in properties, usage and dosage, and should not be used in saline-alkali soil.

7. Diammonium phosphate

Phosphate diplating is a kind of nitrogen and phosphorus compound fertilizer, and its fertilizer effect is long-lasting. It is generally applied as base fertilizer in ditch, the amount of fertilizer is 30-50kg/ mu, and the mixed application of phosphate and phosphate plating is avoided.

8. Potassium dihydrogen phosphate

Potassium dihydrogen phosphate is a kind of phosphorus and potassium composite material with high solubility, with a conventional concentration of 0.2% Mel 0.3%. It is generally used as foliar fertilizer for 2 weeks or combined with spraying.