How to identify fake water soluble fertilizer? What is the meaning of the nutrient content of various elements in water-soluble fertilizer packaging? Water-soluble fertilizer is a multi-component compound fertilizer that can be completely dissolved in water. It can be quickly dissolved in water. The absorption and utilization rate of crops is 2 to 3 times that of common fertilizers. It plays an important role in saving water, saving agricultural water, reducing ecological pollution, improving crop quality and reducing labor. At present, the general consumption areas are mainly concentrated in greenhouse vegetable production bases, fruit tree production bases, and some flowering and other planting areas.
Due to the simple production equipment and process of water-soluble fertilizers, there are many small-scale production enterprises. Some enterprises have no product inspection capability, backward production technology, and low quality awareness, resulting in uneven quality of water-soluble fertilizers on the market, and identification of true and false water-soluble fertilizers. , need to pay attention to the following points:
First, look at the nutrient content of each element on the packaging bag
According to the standard of large-scale water-soluble fertilizers, the single nutrient content of nitrogen, phosphorus and potassium should not be lower than 4%, and the sum of the three should not be less than 50%. If a large amount of elements are seen on the package, the label is less than 4%. , or the sum of the three elements of NPK is less than 50%, indicating that such products are unqualified.
A large number of elements + trace elements:
The trace element content refers to the sum of the contents of copper, iron, manganese, zinc, boron and molybdenum, and the product should contain at least one trace element. The total content of trace elements should not be less than 0.2%, and the single trace elements with a content of not less than 0.05% should be included in the trace element content, and the content of molybdenum should not be higher than 0.5%.
A large number of elements + medium element type:
The content of the medium amount refers to the sum of the content of calcium and magnesium. The product should contain at least one medium element. The total content of the medium element should not be less than 1.0%, and the single medium element with the content not less than 0.1% should be included in the calculation. In the amount of elemental content. Look at the labels for the various specific nutrients on the bag.
The high-quality large-scale water-soluble fertilizer is very clear on the identification of the ingredients (including a large number of elements, medium-quantity elements, trace elements), and they are all single-labeled, so that the nutrient content is clear, and the people can use it with confidence. The nutrient content of informal manufacturers generally appears with the words ≥ 5% of total NPK content. If so marked, the product is not regular.
Second, look at product formula and registered crops
A large amount of water-soluble fertilizer is a formula fertilizer. High-quality water-soluble fertilizer generally has several formulas. From the seedling stage to the harvesting period, a suitable formula can be found. If the package clearly states that it is a special fertilizer for a certain crop, 1-2 recipes hit the world, this kind of practice is not very reliable. A formal fertilizer registration crop is one or several crops, and for unregistered crops, there is a need for local experience.
Third, see if there are product implementation standards
What needs to be explained here is that we usually say that the water-soluble flushing and drip irrigation fertilizers are actually the general name of the product is a large amount of water-soluble fertilizer. The general implementation standard is NY1107-2010. If the standard does not appear on the packaging, , indicating that it is not a large amount of water-soluble fertilizer.
The standard marked on the packaging of a large number of elements of water-soluble fertilizers is based on GB, indicating that such products are unqualified.
In addition, it depends on whether there is a fertilizer registration certificate number. If the vegetable grower has doubts about the product, you can check the fertilizer registration number on the Internet, the qualified large amount of water-soluble fertilizer, the fertilizer registration certificate number and the manufacturer can find it. Can not find, indicating that the product is unqualified.
Look at the inspection report or the fully water-soluble fertilizer produced by the regular manufacturer. The inspection report or certificate should be placed in the package to clearly inform the consumers of the product quality test results of the batch of fertilizer.
Fourth, see if the labeling of heavy metals, etc.
The heavy metal content and water insoluble matter of a large number of elemental water-soluble fertilizers produced by regular manufacturers are lower than the national standards and are clearly marked. If the fertilizer packaging bag is not marked with heavy metal content and water is not contained, it should be used with caution.
Dissolve a small amount of fertilizer with a proper amount of water
High-quality macro-element water-soluble fertilizer can dissolve quickly in water, the solution is clear and there is no residue and sediment. If the fertilizer is not completely dissolved in water, there is residue, indicating that the fertilizer quality is not very good.
Look at the pellets of fertilizer
Good quality water-soluble fertilizer products have uniform particles and are crystalline (the particle size is similar to that of salt particles). If the water-soluble fertilizer fertilizer particle size is different, the large particles are similar to the compound fertilizer or urea particle size, it is best not to buy.
Water soluble fertilizer use technology:
The application of water-fertilizer integration technology to water-soluble fertilizers brings a lot of convenience to agricultural production, but poor use can also bring disasters, and strict fertilization time and fertilizer dosage must be used.
When fertilizing time and watering and fertilizing, the temperature of the water should be as close as possible to the ground temperature and temperature, and do not flood the water. Watering the greenhouse in winter, try to water in the morning; try to water in the afternoon or evening in summer. If you do not use a dropper, try to pour as little water as possible.
Flooding of large water is easy to cause soil compaction, root respiration is blocked, affecting nutrient absorption, and it is easy to rotten roots and dead trees. Promoting "cultivation on the ridge" is conducive to high yield of crops.
The amount of fertilizer used can only be obtained by scientific fertilization to obtain the desired yield and quality. Scientific fertilization is not only about the distribution of the party, the quality, but also the scientific use.
Generally speaking, terrestrial vegetables use 50% water soluble fertilizer, the amount of mu is about 5 kg, plus about 0.5 kg of water-soluble organic humic acid, amino acid, chitin, etc., in addition to increasing nitrogen, phosphorus and potassium nutrients, Improve crop disease resistance, drought resistance, cold resistance, and reduce the occurrence of deficiency syndrome.
Take vegetable crops such as cucumber and tomato as examples. Cucumber and tomato are crops that are continuously flowering, fruitful, and harvested. According to the Ministry of Agriculture, about 3 kg of nitrogen, 1 kg of phosphorus pentoxide, and oxidation are required for every 1000 kg of cucumber produced. Potassium 2.5 kg, calcium oxide 1.5 kg, magnesium oxide 0.5 kg.
Cucumber, tomato and other crops have a higher amount of vegetative growth nitrogen fertilizer in the early stage, and can not be deficient in phosphorus and boron during flowering. In the end, potassium and calcium should be increased, and magnesium fertilizer should be added in the middle and late stages. In other words, nutrient balance should be achieved throughout the growth period.
In the case of mastering the balance of nutrients, it is also necessary to pay attention to the combined use of water-soluble organic matter, including the use of carbon dioxide gas fertilizer.
Avoid direct application and take a second dilution. The water-soluble fertilizer has higher nutrient content than the common compound fertilizer, and the dosage is relatively small. The direct application of the fertilizer is easy to cause the roots of the seedlings and the weak seedlings, and the secondary dilution is not only beneficial to the uniform application of the fertilizer, but also can improve the fertilizer utilization rate.
With the development of the times, many manufacturers have different production of water-soluble fertilizers, some pay attention to quality, some pay attention to price, but put them on farmers, how to judge the water-soluble fertilizer suitable for them, which manufacturers produce Is it a qualified water soluble fertilizer? In recent years, along with the development of vegetable cultivation industry, there are more and more brands of water-soluble fertilizers at home and abroad, so many counterfeit and shoddy products have also taken the opportunity to flow into the agricultural resources market. This has caused farmers to know how to choose high-quality water-soluble fertilizers. status quo. Today, Xiaobian introduces you to several tips:
Look at the formula: water-soluble fertilizers such as fertilization and fertilizer are actually formula fertilizers. Different formulas are prepared according to different crops, different soils and different water quality to maximize the nutritional needs of crops, improve fertilizer utilization, and reduce waste. Therefore, the formula is Identify the key to the quality of water soluble fertilizer.
See content: good water soluble fertilizer is industrial grade or even food grade raw material, high purity, and will not add any filler, so the content is relatively high, 100% are nutrients that can be absorbed by crops The content of substances, nitrogen, phosphorus and potassium is generally up to 58% or even higher. Poor water soluble fertilizers generally have a low content, and each cost is different.
Look at water solubility: to identify the water solubility of water-soluble fertilizers, only need to dissolve the fertilizer into the clear water, see if the solution is clear and transparent, if the water is the same as the water, except the color of the fertilizer, the water solubility is very good; if the solution is cloudy or even precipitated, Water solubility is very poor, can not be used in drip irrigation systems, fertilizer waste will be more.
Smell the taste: high-quality water-soluble fertilizer is made from high-purity raw materials, generally only a very light fragrance. Fertilizers with irritating odors are either hormones or too much harmful substances. This fertilizer works quickly, but it does not have any benefit to the disease resistance and sustained quantity and quality of the crop.
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