The role of N，P，K fertilizers and the harm of excessive use

The role and harm of nitrogen

1. The role of nitrogen

The plant is deficient in nitrogen and the color is green and light, the old leaves at the base are yellow, and brown after drying! The fruit is small, the fruit is few, and the skin is hard. It must be that the fruit tree lacks nitrogen! It can not only form chlorophyll, but also form nucleotides!

The role of nitrogen: Nitrogen fertilizer is the most required chemical fertilizer variety in agricultural production, and it plays an important role in increasing crop yield and improving the quality of agricultural products. It is a component of amino acids in plants, a component of protein, and a component of chlorophyll that plays a decisive role in photosynthesis in plants. Nitrogen also helps crops disperse. The application of nitrogen fertilizer can not only increase the yield of agricultural products, but also improve the quality of agricultural products.

2. The harm of excessive nitrogen: it hinders the growth of crops and produces toxic nitrite

Nitrogen fertilizer is the most required chemical fertilizer variety in agricultural production, and it plays an important role in increasing crop yield and improving the quality of agricultural products. However, if there is too much supply, the crops will be green and late-maturing, and the growth period will be prolonged. The main performance is that the cell walls are thin, the plants are soft, and they are vulnerable to mechanical damage (lodging) and disease invasion (such as barley brown rust, wheat scab, rice brown spot disease).

NPK Compound Fertilizer Granular High Tower Granulation Tumbling Granulation

The role and harm of phosphorus

1. The role of phosphorus

Phosphorus-deficient plants in crops are dark green, and red and purple also appear. After drying, the color is green and dark, and the stem nodes are also thin and short! The leaves at the base turn yellow, the flowering time is a few days later, and the seeds become smaller and less plump!

The role of phosphorus: it can not only increase the yield of crops, but also improve the quality of crops. It can accelerate the growth of cereal crops, promote large and full grains, promote the flowering and fruiting of vegetables, melons, cotton and other fruit trees, and increase the fruiting rate; increase the sugar content of fruits and sugarcane, and increase the oil content of rapeseed.

Phosphorus is an important component of the plant nucleus. It plays an important role in cell division and the differentiation and development of various plant organs and tissues, especially flowering and fruiting. It is an indispensable element for physiological metabolic activities in plants. Phosphorus in plants is mainly concentrated in the seeds of plants, and more phosphorus is stored in the seeds, which is conducive to the healthy growth of seedlings in the early stage. Phosphorus also has a good effect on improving plant drug resistance, cold resistance and drought resistance. Phosphorus also has the effect of promoting root development, especially promoting the development of lateral roots and fine roots.

2. The harm of excessive phosphorus: cause soil sulfur deficiency crops to lose green and yellow

The application of ordinary calcium superphosphate can not only provide phosphorus nutrition for crops, but also enable crops to obtain sulfur nutrition, but because of its low phosphorus content and many by-products, heavy superphosphate, a phosphate fertilizer variety, is commonly used in production. Heavy superphosphate does not contain impurities such as calcium sulfate, so that the content of phosphorus is greatly increased, and it becomes a high-concentration phosphate fertilizer. Therefore, the perennial application of triple superphosphate will naturally lead to sulfur deficiency.

The role of potassium and the dangers of excess

1. The role of potassium

Potassium deficiency in crops needs to be supplemented. The edges of the leaves turn yellow first, and the leaf edges are severely burnt. Organic compounds do not participate, ionic in cell fluid, activator of multiple enzymes, strong in metabolic process!

Function: The application of potassium fertilizer can promote the photosynthesis of crops, promote crop results and improve the cold resistance and disease resistance of crops, thereby increasing agricultural output. Potassium exists in the form of free potassium ions in plants, which can promote the metabolism of carbohydrates and nitrogen; control and regulate the activity of various mineral nutrients; activate the activities of various enzymes; control the transport of nutrients and water; maintain the vitality of cells Internal pressure, thus preventing the plants from wilting.

2. Potassium excess: affecting crop growth and destroying soil structure

Potassium fertilizer is a potassium nutrient fertilizer for plant growth. Appropriate application of potassium fertilizer can make grains plump, increase the size of roots such as potatoes and potatoes, increase the sugar content of fruits, etc., increase the tillering of gramineous crops such as rice and wheat, and can Make the stem and root of the plant strong, not easy to lodging, and enhance the ability of drought resistance, cold resistance and disease resistance. Although potassium fertilizer has many benefits, the more the dosage, the better. Excessive application will have adverse effects on crops:

①Reduce the absorption of magnesium and calcium by crops, causing the occurrence of various diseases such as "heart rot" of leafy vegetables and "bitter pit disease" of apples;

② It has a hindering effect on the growth of crops, causing crops to be prone to lodging and other symptoms;

③Cause harmful metals and harmful bacteria in some plots exceed the standard, destroy the nutritional structure and balance in the soil, lead to deterioration of soil properties, and water pollution.

④ It will reduce the production of crops, seriously weaken the production capacity of crops, and reduce the output.

Therefore, the rational application of fertilizers is the key to high crop yields.