What are the advantages of compound fertilizer? A detailed guide

Compound fertilizer has advantages such as high nutrient content, few secondary components and good physical properties. It plays a very important role in balanced fertilization, improving fertilizer use efficiency and promoting high and stable crop yields. But it also has some disadvantages, for example, its nutrient ratio is always fixed, while the types, amounts and ratios of nutrient elements required by different soils and different crops are diverse. Let's take a look below!

What kinds of compound fertilizer are there?

1. Special fertilizer for rice: made with urea, ammonium phosphate and potassium chloride as the main raw materials, with effective nutrient content of nitrogen, phosphorus and potassium ≥25%. It can be used as base fertilizer and topdressing. The usual application rate is 60-75 kg per mu, with base fertilizer accounting for 60-70% of the application amount and topdressing accounting for 30-40%.

2. Special fertilizer for corn: a special fertilizer produced with a professional formula based on the fertilizer requirements during corn growth and suited to corn's demand for nitrogen, phosphorus and potassium [1]

3. Special fertilizer for moso bamboo: made with urea, ammonium phosphate and potassium chloride as the main raw materials, with effective nutrient content of nitrogen, phosphorus and potassium ≥28.5%. Apply 50 kg per mu, annually in May-June combined with weeding, using furrow application or band application.

4. Special fertilizer for tea: made with urea, ammonium phosphate, potassium sulfate and appropriate amounts of medium and trace nutrient elements such as magnesium and boron as the main raw materials, with effective nutrient content of nitrogen, phosphorus and potassium ≥25.0%. The application rate is determined by the per-mu yield of mature trees. Generally, for per-mu dry tea yields of 50, 100 and 150 kg, apply 70, 90 and 120 kg of the special fertilizer respectively. Apply 50% of the total amount 1 month before spring tea picking, 25% of the total amount after spring tea picking, and 25% of the total amount 15-20 days before autumn tea picking.

5. Special fertilizer for tobacco: generally, for fields of medium fertility, apply 50 g per plant by opening a furrow and banding it in when tobacco is transplanted.

6. Potassium sulfate fruit tree fertilizer: made with urea, ammonium phosphate and potassium sulfate as the main raw materials, with effective nutrient content of nitrogen, phosphorus and potassium ≥36%. Apply 3-4 kg per mature tree per year evenly near the tree crown drip line. Ring application, circular application and band application are all acceptable, with a furrow depth of 30CM.

7. Pollution-free vegetable fertilizer: made with urea, ammonium phosphate and potassium sulfate as the main raw materials, with effective nutrient content of nitrogen, phosphorus and potassium ≥35%. For melons and fruit vegetables, apply 80-150 kg per mu per crop, of which 30-60 kg is used as base fertilizer and 50-90 kg as topdressing. For leafy vegetables, apply 60-120 kg per mu per crop, of which 15-40 kg is used as base fertilizer and 40-80 kg as topdressing.

8. Special fertilizer for eucalyptus: abbreviated as eucalyptus fertilizer. It is a modern high-tech afforestation product carefully developed according to the unique physiological characteristics of eucalyptus, the latest technology for high-yield eucalyptus plantation management, and related scientific theories such as botany, soil nutrition and forestry production. It not only scientifically blends rich nitrogen, phosphorus, potassium and other nutrient elements necessary for the rapid growth of eucalyptus, but also, in view of the fact that soils in southern China generally lack trace elements such as boron and zinc and that eucalyptus is mostly planted on mountainous and sloping land lacking organic matter and with poor fertility, reasonably adds various medium and trace elements such as magnesium, copper and zinc as well as humic acid-containing organic matter. After application, it not only balances eucalyptus nutrition and enhances growth potential, but also effectively prevents physiological diseases such as drooping tip disease, ensuring healthy and rapid growth of eucalyptus, greatly increasing the timber-forming rate and timber yield of eucalyptus, with remarkable effects in increasing yield and income.

9. High-concentration compound mixed fertilizer: made with urea, ammonium phosphate and potassium chloride as the main raw materials, with effective nutrient content of nitrogen, phosphorus and potassium ≥45%. It can be applied as base fertilizer and topdressing, and the application rate should be determined according to factors such as soil fertility and crop type.

10. Slow-release fertilizer and loss-control fertilizer, etc.

Advantages of compound fertilizer

Compound fertilizer mainly includes granulation processes such as disc granulation, drum granulation, slurry granulation and ammoniation granulation. Regardless of the granulation process, all have the following advantages:

1. Comprehensive nutrients and high content: it contains two or more nutrient elements, can supply various nutrients needed by crops relatively evenly and over a long period at the same time, and improves the effect of fertilization.

2. Good physical properties and easy to apply: compound fertilizer granules are generally relatively uniform in size and low in hygroscopicity, making them easy to store and apply, and more suitable for mechanized application.

3. Few secondary components and no adverse effects on soil: most of the nutrients contained in compound fertilizer are essential to crops, which can both avoid the waste of certain material resources and avoid the adverse effects of certain secondary components on soil.

4. Diverse ratios, conducive to targeted selection and application: the main feature of compound fertilizer is that it can be selected and applied according to soil nutrient characteristics and crop nutritional characteristics, avoiding the waste of certain nutrients and improving the yield-increasing effect of fertilizer.

5. Lower costs and savings in expenses: compound fertilizer has few secondary components, and its effective component content is generally higher than that of straight fertilizer. Fertilizer containing the same amount of nutrients is smaller in volume, lower in packaging and transportation costs, and convenient to apply.