6 Questions About Plant Nutrition

6 Questions About Plant Nutrition

Top dressing is necessary for most garden plants. What is the difference between mineral, organic and humic fertilizers and how to use them correctly?

1. Why do you need mineral fertilizers?

Give nutrients. Mineral fertilizers help plants not get sick, bring a good harvest and survive the winter. They are divided into natural and synthetic, of which the majority. Among the natural ones are ash, dolomite and phosphorite flour, Chilean nitrate. Mineral fertilizers for garden flowers are absolutely necessary, in particular, petunias and asters that can not tolerate organics, as well as many plants that we eat. (source)

2. How to make mineral fertilizers?

Integrated, observing the dosage. It is necessary to carefully observe the recommended dosage and fertilize in a complex way – without one substance, others may not be absorbed. Potash and phosphorus fertilizers are applied once a season, but nitrogen is fertilized several times – they are well washed out of the ground. Remember that an excess of salts for plants is even more dangerous than a deficiency, so apply fertilizer carefully: it is advisable to calculate the application rate based on soil analysis.

3. Why do we need humic fertilizers?

Bind heavy metals and radionuclides. Humic fertilizers – organic acids obtained from natural materials – peat, sapropel, brown coal. They significantly increase the yield and its consumer qualities, and can also protect plants from the harmful effects of the environment, save during frost and drought. Humins stimulate the development of soil organisms, improving the very structure of the soil. They can be used to feed fruit-bearing crops and as flower fertilizers.

4. How to apply humic fertilizers?

Little by little. They are introduced into the soil in a small amount, but they work effectively: they improve plant nutrition and reduce the nitrate content in the soil. If you are afraid to go too far with synthetic mineral fertilizers – supplement them with humic ones, and the plants will balance their nutrition themselves.

5. Why organic fertilizers?

Improve the soil. By themselves, they are not absorbed by plants, and as fertilizers for flowers, they are often not suitable at all. But organic fertilizers stimulate the activity of soil organisms – worms, bacteria, fungi, which mineralize organic matter and improve soil quality. Peat is added for the same purpose – there are practically no nutrients in it, but it makes the soil more airy and stimulates the activity of microorganisms.

6. When and by what need to feed fruiting trees and shrubs?

Depends on the period. Root dressing is necessary for fruiting plants throughout the season. At the same time, different fertilizers are used at different stages.

  • The first feeding cycle should be done after the start of the growing season: at this stage, potash and nitrogen fertilizers are applied. Urea (urea) is recommended for plums, cherries and gooseberries, potassium sulfate for plums and currants, and nitrogenous fertilizers for pears and apple trees. There are also complex preparations – for example, nitrophosk for gooseberries and “Ideal” for currants. In addition, it is useful to use humus for pears and apple trees, peat and wood ash for currants.
  • The second cycle of root dressing takes place during the flowering period. Apples and pears need phosphates, potassium sulfate and urea. Currants and gooseberries are fed with potassium sulfate, peat and ash.
  • The third cycle is carried out during fruit setting. Again they give nitrogenous fertilizers, for example, urea and actively complex, for example, nitrophos. Humates will also be useful at this stage.

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