A Revista Cadernos de Cultura e Ciência é de caráter nacional e multidisciplinar, cadastrada com o ISSN 1980-5861.

Comentários do leitor

Basic knowledge of fertilizer

por Abraham Arndt (2020-03-21)

Basic knowledge of fertilizer

1, what is called the fertilizer?

Usually in the soil or sprayed on the crop ground part, can directly or indirectly supply crop nutrients, increase crop yield, improve product quality and improving the soil properties, fertility substance, called fertilizer. Direct supply crop required those fertilizer called directly as fertilizer, nitrogen fertilizer, phosphate fertilizer, potash fertilizer, trace element and compound fertilizer all belong to this category. While others are mainly to improve soil physical properties, chemical properties and biological properties, so as to improve the growth condition of crop fertilizer called indirect fertilizer, such as lime, gypsum and bacterial fertilizer belongs to this kind of.

What types of 2, fertilizer?

? according to the chemical composition: organic fertilizer, inorganic fertilizer, organic and 특가 이벤트 inorganic fertilizer;

? according to the nutrient division: fertilizers, compound and mixed fertilizer ($) (multi nutrient fertilizers);

? according to the fertilizer efficiency of method: quick acting fertilizer, slow-release fertilizer;

According to the physical situation of fertilizer?: solid fertilizer, liquid fertilizer, gas fertilizer;

? according to the chemical properties of fertilizer: basic fertilizer, acid fertilizer, neutral fertilizer;

3, what is the chemical fertilizer?

In a narrow sense, refers to the production of chemical fertilizers by chemical methods of fertilizer; in a broad sense, it refers to all inorganic fertilizer chemical fertilizer industry production and slow-release fertilizer. So some people only think of n is called chemical fertilizer is not comprehensive, fertilizer is a general term for nitrogen, phosphorus and potassium, compound fertilizer.

4, what is the organic fertilizer?

Organic fertilizer is the rural using various derived from plant and animal residues or human and animal wastes organic material, in situ product or direct tilling a kind of natural fertilizer embedded application, it is also customary called farmyard manure.

5, organic fertilizer is divided into many classes?

Organic fertilizer can be broadly divided into the following four categories: (1) manure: including human and animal manure and manure, poultry manure, guano and silkworm excrement etc.. (2): including the compost and compost compost fertilizer, straw, biogas fertilizer. (3) green manure: including planting green manure and wild green manure. (4) manure: including peat and humic acid fertilizer, oil meal, soil type of fertilizer and fertilizer etc. sea.

6, chemical fertilizer and organic fertilizer, what is the difference?

(1) the organic fertilizer contains large amounts of organic matter, and has obvious effect of soil; chemical fertilizer only provide plant mineral nutrition, long-term use may cause adverse effects on soil, makes the soil "more for more greedy".

(2) the organic fertilizer contains a variety of nutrients, nutrient comprehensive balance; and fertilizer nutrients contained in the type of a single, long term application of easy to cause soil and in food nutrient imbalance.

(3) the organic fertilizer nutrient content is low, need a large number of application of chemical fertilizer, and nutrient content is high, less consumption.

(4) organic fertilizer fertilizer for long time; chemical fertilizer effect period is short but fierce, easy to cause the loss of nutrients and environmental pollution.

(5) organic fertilizer derived from natural, without any chemical synthetic fertilizer, long-term use can improve the quality of agricultural products; chemical fertilizer is a pure synthetic chemical substances, improper application can reduce the quality of agricultural products.

(6) organic fertilizer in the production process, long after the composting process of full, after use can improve crop drought resistance, disease resistance and insect resistance, reduce the use of pesticides; long-term application of chemical fertilizer, due to decreased immunity in plants, often need a large number of chemical pesticides to maintain crop growth, easy to cause the harmful substances in food the increase in.

(7) the organic fertilizer contains a high number of beneficial microorganisms that can promote the soil biological transformation process, is beneficial to soil fertility increased; a large number of long-term application of chemical fertilizers could inhibit the activities of soil microbes, automatic regulation ability to decrease soil.

ISSN: 1980-5861