I make a popular science video and all the emperors learn from it!

[Popular science continues.] 】

[The most important value of phosphorus is actually to make phosphate fertilizer. 】

Phosphate fertilizer is a fertilizer with phosphorus as the main nutrient. 】

[The magnitude (significance) and speed of phosphate fertilizer efficiency are determined by the content of effective phosphorus pentoxide, soil properties, fertilization methods, crop types, etc. 】

[The sources of phosphate fertilizer can be divided into two types:]

[(1) Natural phosphate fertilizers, such as seabird droppings, animal bone meal and fish bone meal, etc. 】

[(2) Chemical phosphate fertilizers, such as superphosphate, heavy superphosphate, calcium-magnesium phosphate fertilizer, phosphate rock powder, etc.] 】

【The role of phosphate fertilizer:】

[Rational application of phosphate fertilizer can increase crop yield, improve crop quality, accelerate the tillering of cereal crops and promote grain fullness; promote the flowering and fruiting of cotton, melons, nightshade vegetables and fruit trees, and increase the fruiting rate; increase the sugar content of sugar beets, sugarcane, watermelons, etc.; and the oil content of rapeseed. 】

【Application Principle:】

[1. Reduce contact with the soil as much as possible, and concentrate on fertilization, such as strip application and hole application. 】

[2. Try to increase the chance of contact with the root system.] 】

[3, 21 reduce the fixation by soil iron and aluminum. 】

【Application Method:】

[Phosphate fertilizer is generally applied as basal fertilizer, under the same conditions, the higher the available phosphorus content of the soil, the lower the phosphate fertilizer efficiency, and the appropriate dosage range of phosphate fertilizer for several major crops on the general phosphorus-deficient soil:]

[Phosphate fertilizer (4-6) kg per mu for grain crops, sweet potato, potato, cotton, peanuts, rape, soybeans, jute, tea trees (3-5) kg, watermelon (2-4) kg, tobacco (1-3) kg, sugarcane (6-8) kg, fruit trees per plant is (0.2-0.3) kg. 】

[When it is found that the crop shows symptoms of phosphorus deficiency, the foliar spray of phosphorus fertilizer is used to make the phosphorus enter the crop through the stomata or cuticle on the foliar surface. 】

[Rice, wheat and other gramineous crops can be used 2% to 3% concentration, rape, vegetables can be used 1% concentration. 】

[You can also use a concentration of 0.25% potassium dihydrogen phosphate and spray it after the dew dries in the morning on a sunny day or before the dew in the evening, which has a significant effect of increasing yield. 】

【Symptoms of phosphorus deficiency in crops:】

[When the crop is deficient in phosphorus, it grows slowly, is short and thin, erect, has few branches, and the leaves are small and easy to fall off; the color is general, dark green or gray-green, and the leaf margins and petioles often appear purple-red; the root system is stunted, the maturity is delayed, and the yield and quality are reduced. 】

[Phosphorus deficiency symptoms generally start from the old leaves at the base of the stem and gradually develop upwards. 】

[Symptoms of phosphorus deficiency in major crops are as follows:]

[1. Wheat: the plant is thin, the tillers are few, the leaf color is dark green and slightly purple, the purple on the leaf sheath is particularly obvious, the symptoms are from the tip of the leaf to the base, from the old leaf to the young leaf, and the cold resistance is poor. 】

[2. Corn: starting from seedlings, developing along the leaf edge to the leaf sheath at the tip of the leaf, showing a dark green with purple-red, gradually expanding to the whole leaf, the symptoms turn from the lower leaf to the upper leaf, the base to the whole plant is purple-red, the severely phosphorus-deficient leaves start to wither from the tip of the leaf and are brown, the silking is delayed, the female panicle is not fully developed, the bending is deformed, and the fruit ear setting is poor. 】

[3. Potato: The plant is thin and small, the top stops growing when it is severe, the edges of the leaves, petioles and leaflets are somewhat wrinkled, the lower leaves are rolled upward, the leaf margins are scorched, the old leaves fall off in advance, and the tubers sometimes produce some rusty brown spots. 】

[4. Rice: The plant is thin, no tillers or few tillers, the leaves are erect, narrow, and dark green. In severe cases, the rice bushes are tightly bundled, the leaves are longitudinally curled, there are reddish-brown spots, and the growth period is prolonged. 】

[5. Soybean: The plant is thin, the leaf color is dark green, the leaves are narrow and pointed, upright, and the leaves appear brown spots after flowering, and the seeds are small. When phosphorus deficiency is severe, the stems and leaves turn dark red. 】

[6. Peanut: The old leaves are dark green to blue-green, and later turn yellow and fall off, and the base of the stem is red. 】

[7. Cotton: The plant is dwarf, old, gray and dark in leaf color, thin in stem, and red at the base. There are few fruit branches, small leaves, leaf margins and petioles often appear purple-red, the root system is underdeveloped, the maturity is delayed, the bud bells are easy to fall off, and the yield and quality are reduced. 】

[8. Rape: the plant is thin, the leaves are late, the upper leaves are dark green, the base leaves are purple-red or dark purple, and sometimes purple spots or patches appear on the edge of the leaves, which are susceptible to frost damage. The branches are small, delayed flowering and ripening. (Read the violent novel, go to the Feilu Novel Network!)

[9. Tobacco: The whole plant is clustered, the leaves are narrow, dark, erect, and the old leaves have necrotic spots, which turn brown after drying. The color of the tobacco leaves after being roasted by fire is dull and dull. 】

[10. Tomato: In the early stage, the back of the leaf appears purple-red, and some small spots appear between the veins, and then extend to the whole leaf, and the veins and petioles finally turn purple-red. The stems are slender, fibrous and have small leaves, with curled leaves and delayed fruiting in the later stages. 】

[11. Cucumber: the plant is dwarfed, when severe, the young leaves are small and stiff, and dark green, and the cotyledons and old leaves appear large water-stained spots, and spread to the young leaves, the patches gradually turn brown and dry, and the leaves wither and fall off. 】

[12. Onion: phosphorus deficiency is mostly manifested in the late growth stage, generally slow growth, the tip of the old leaf is dry and dead, and sometimes the leaves show green-yellow and brown spots. 】

[13. Apple: small leaves, with bronze dark green to purple, few branches, few leaves, and small fruits. 】

[14. Peach: the leaves are dark green to bronze, or the development of 080 is purple; one is narrower than the old leaves, curled outward near the leaf margin; early deciduous leaves, the leaves are scarce. 】

【......】

Ancient peasants, after seeing this popular science.

The look of joy is not disguised in the slightest!

Crops are their lifeblood!

There is nothing more satisfying than collecting more food in your own land!

"Phosphate fertilizer, this thing can make more food grow in the field, doesn't that mean?"

The wheat I grow is short and the leaves are purple, because of the lack of phosphorus. "

"Hey, the peanut leaves I planted are all yellow, and it turns out that there is also a lack of phosphorus. "[]

"I understand, in the future, collect more seabird droppings, break animal bones, and scatter them all in the field, so that I can harvest more grain in the next year!"

“......"

Meanwhile.

The emperor, who was rewarded with fertilizer before, is not calm!.