1. What is fertilizer?
Any substance that is applied to the soil or sprayed on the above-ground parts of crops and can directly or indirectly supply crop nutrients, increase crop yields, improve product quality, or improve soil properties and improve soil fertility is called fertilizer. Those fertilizers that directly supply essential nutrients to crops are called direct fertilizers, such as nitrogen fertilizers, phosphate fertilizers, potassium fertilizers, trace elements and compound fertilizers all fall into this category.
Other fertilizers that are mainly used to improve the physical, chemical and biological properties of the soil, thereby improving the growing conditions of crops, are called indirect fertilizers, such as lime, gypsum and bacterial fertilizers, etc. fall into this category.
2. What types of fertilizers are there?
According to chemical composition: organic fertilizer, inorganic fertilizer, organic-inorganic fertilizer;
According to nutrients: simple fertilizer, compound (mixed) fertilizer (multi-nutrient fertilizer);
According to the mode of fertilizer effect: quick-acting fertilizer, slow-acting fertilizer;
According to the physical condition of the fertilizer: solid fertilizer, liquid fertilizer, gas fertilizer;
According to the chemical properties of fertilizers: alkaline fertilizers, acidic fertilizers, neutral fertilizers;
3. What are chemical fertilizers?
In a narrow sense, chemical fertilizers refer to fertilizers produced by chemical methods; in a broad sense, chemical fertilizers refer to all inorganic fertilizers and slow-release fertilizers produced in industry. Therefore, some people only call nitrogen fertilizer chemical fertilizer, which is not comprehensive. Chemical fertilizer is the general term for nitrogen, phosphorus, potassium, and compound fertilizer.
4. What is organic fertilizer?
Organic fertilizer is a type of natural fertilizer in rural areas that uses various organic materials derived from animal and plant residues or human and animal excrement, and is accumulated on site or directly cultivated and buried for application. It is also customarily called farm fertilizer.
5. What is a single fertilizer?
Among the three nutrients of nitrogen, phosphorus and potassium, nitrogen fertilizer, phosphate fertilizer or potassium fertilizer has only one nutrient indicated amount.
6. What is the difference between chemical fertilizers and organic fertilizers?
(1) Organic fertilizers contain a large amount of organic matter and have an obvious effect of improving soil and fertilizing; chemical fertilizers can only provide inorganic nutrients for crops, and long-term application will cause adverse effects on the soil, making the soil “more greedy as you plant”.
(2) Organic fertilizers contain a variety of nutrients and contain a comprehensive balance of nutrients; while chemical fertilizers contain a single type of nutrients, and long-term application can easily cause nutrient imbalance in the soil and food.
(3) Organic fertilizers have low nutrient content and need to be applied in large quantities, while chemical fertilizers have high nutrient content and need to be applied in small amounts.
(4) Organic fertilizers are effective for a long time; chemical fertilizers are short and intense, which can easily cause nutrient loss and pollute the environment.
(5) Organic fertilizers are derived from nature and do not contain any chemical synthetic substances. Long-term application can improve the quality of agricultural products; chemical fertilizers are purely chemical synthetic substances and improper application can reduce the quality of agricultural products.
(6) During the production and processing of organic fertilizers, as long as they are fully decomposed, they can improve the drought resistance, disease resistance, and insect resistance of crops after application, and reduce the use of pesticides; long-term application of chemical fertilizers will reduce the immunity of plants. It often requires a large amount of chemical pesticides to maintain crop growth, which can easily lead to an increase in harmful substances in food.
(7) Organic fertilizers contain a large number of beneficial microorganisms, which can promote the biological transformation process in the soil and are conducive to the continuous improvement of soil fertility; long-term application of large amounts of chemical fertilizers can inhibit the activity of soil microorganisms, leading to a decrease in the soil’s automatic adjustment ability.
Post time: Jun-13-2024
