Is it better to apply fertilizer and fertilize than to water?

The high demand for nitrogen fertilizer in wheat plays an important role in the growth and tillering of roots, stems and leaves at the seedling stage, and the increase of green leaf area at the jointing stage is particularly significant. If the nitrogen fertilizer is insufficient, it is easy to lead to less roots, small trees, fewer tillers, light leaf color, early maturity, small ears and fewer grains, and low yield. Excessive nitrogen fertilizer is not good, too much will cause more tillers at the seedling stage, less effective tillers, long stalks, poor stress resistance, easy to get diseases, greedy for green and late maturity, lodging and yield reduction.

Now planting wheat is generally a one-time application of full seed fertilizer, no longer top dressing in the later stage, at most a few sprays of foliar fertilizer. However, the wheat in some plots, especially the late-sown wheat, the wheat on the barren land, will be found to have yellowing and lack of fertilizer after the beginning of spring.

If the soil moisture is good, most of us use chemical fertilizer to draw urea, and draw 20-30 catties per acre. According to the characteristics of urea, it is the best way to use it in the soil, and it is not flooded immediately after the stroke.

However, in practice, everyone generally sprinkles 20-30 catties of urea per mu before watering wheat, and then waters. If urea is sprinkled after watering, first, some urea particles will fall in the leaves and heart leaves, and once dissolved, it will cause the killing of the leaves; Second, if the watering is too large, it will take many days to sprinkle urea on the ground, so it is better to sprinkle it before watering.

From the perspective of scientific fertilization, urea sprinkling on the surface will cause the volatilization loss of nitrogen and reduce the fertilizer efficiency. Moreover, watering after sprinkling will cause urea to sink to the bottom layer of the soil with the water, and some of it will be wasted. But in fact, urea also has a certain dissolution time, not water to dissolve, although there is a loss, but the fertilizer effect is still used more, the big deal is to sprinkle an extra 10 catties and 8 catties. Now farming is a principle, you can save a little effort, and time is money.

Although wheat is more sensitive to nitrogen fertilizer, the application of nitrogen fertilizer is reasonable, otherwise it will have a great impact on the yield, too little nitrogen fertilizer can not grow up in wheat, the stalks are short, and malnutrition will affect the yield. However, if too much nitrogen fertilizer is applied, it will cause excess nutrients, affect the differentiation of young ears, and the late maturity of greedy green will affect the yield, so we have to look at the fertilization of wheat seedlings according to the fertility of the wheat field, especially in the middle and late stages with less or no nitrogen fertilizer, and nitrogen should be sprayed on the leaves when there is a lack of nitrogen. In the application of urea in wheat, in terms of fertilizer efficiency and utilization efficiency, whether it is applied before or after watering, it is not as good as soil classification; However, in terms of the habit of applying urea, or saving trouble, it is commonly used to sprinkle urea before watering.

It is better to fertilize the ground without watering.

After flood irrigation, the soil water storage is very low, and the fertilizer loss ratio of the fertilizer applicator is large.

If I can get the fertilizer into the roots of the crops, I can often water it around the periphery. Most of the flood irrigation should be watered by nitrogen tires first, and the others can be watered with fertilizer at the same time.

Q: How can farmers reduce blindness and enhance scientific fertilization? A:

In order to achieve the goal of "high yield, high quality, and high efficiency", farmers must apply fertilizer reasonably. Only by learning the basic theory of fertilization and enhancing the scientific nature can the peasants reduce blindness when applying fertilizer. Q:

What fertilization theories should farmers learn? A: The first basic theory of fertilization is called the theory of nutrient return, which can help farmers solve the problem of understanding.

The crops that farmers harvest from the land every year inevitably take a lot of nutrients from the soil, and the higher the crop yield, the greater the amount of nutrients taken away. Although the soil is a nutrient "reservoir" for crops, even if the capacity of the "reservoir" is large, the nutrients in the "reservoir" will be exhausted one day, although it takes a long time for the soil fertility to be depleted. The only way to solve this problem is to fertilize the soil to replenish some of the nutrients that are taken away.

Knowing this truth, it is not difficult for people to understand why agricultural production emphasizes fertilization. Think about it, what do we get for the agricultural products we harvest every year? It is exchanged for soil nutrients.

So, what do we get for the meat, eggs, and milk we eat? They are indirectly exchanged for soil nutrients. Q:

Listening to what you say, farmers should be more motivated to apply fertilizer. Could you please tell the farmers about the purpose of returning nutrients? A:

The purpose of returning nutrients is twofold: one is to restore or improve soil fertility, and the other is to increase yields. Therefore, only rational fertilization can provide material guarantee for the sustainable development of agriculture.

Question: After farmers know the truth of fertilizing for farming, what kind of fertilizer should be applied? A:

From the perspective of material cycle, only the rational application of chemical fertilizers can expand the circle of material cycle, so as to ensure the increase of crop yield and promote the sustainable development of agriculture. In the future, the sustainable development of agriculture will mainly depend on the rational input of chemical fertilizers, but it does not exclude the application of all available organic fertilizers. However, we reject the idea of organic agriculture that excludes the use of chemical fertilizers, because organic agriculture is not in line with our national conditions.

In short, the combination of organic fertilizer and chemical fertilizer is the right direction for the reasonable return of nutrients. Expert tip: Only by learning the basic theory of reasonable fertilization can we overcome the blindness of fertilization and enhance the scientificity.

Nutrient repatriation reflects the need for rational fertilization with the aim of restoring soil fertility and increasing yields. Applying organic fertilizers and chemical fertilizers are two ways to return nutrients. However, the main way of nutrient return is through the rational application of chemical fertilizers.

Do not fertilize when ploughing, but fertilize before sowing, such as bed soil before sowing.

20 days before sowing, the seedbed was fertilized as the last fertilizer, and inorganic nitrogen, phosphorus and potassium fertilizers were applied to increase the content of available nutrients, improve the fertilizer intensity and balance nutrition. Generally, 30 50 grams of urea, 100 150 grams of superphosphate, and 40 50 grams of potassium chloride are applied per square meter, and the mixture is sprinkled on the bed surface in 3 times. After each spreading, it must be raked sufficiently to make the fertilizer evenly mixed in the 0 10 cm soil layer.

Finally, the available nitrogen, phosphorus and potassium contents of the bed soil reached the fertility levels of 150 mg kg, 20 30 mg kg and 120 150 mg kg, respectively. At present, many places on pre-sowing fertilization are selected seedling enhancers, which can omit many operation links, save labor and labor, are safe and reliable, and have good effects, which are worthy of vigorous promotion and application.

Of course, you can, as long as the soil is moist and the fertilizer is not too close to the seeds.

Hit two tricks. 1. Heavy chemical fertilizer and light organic fertilizer.

Organic fertilizer can improve the overall nutrition of crops, improve soil physical and chemical properties, supplement the consumption of soil organic matter, organic fertilizer can not only provide crops with a variety of fertilizer elements, more importantly, it continuously releases carbon dioxide, organic fertilizer is the basis of vegetable production, vegetable production is mainly organic fertilizer, supplemented by chemical fertilizer, which can not only play the characteristics of long fertilizer efficiency and complete nutrition of organic fertilizer, but also use the advantages of high nutrient content of chemical fertilizer and rapid fertilizer efficiency. The combination of the two is the right way to fertilize, and in production, many vegetable farmers ignore organic fertilizer, less or no application is wrong.

Second, it is believed that the more chemical fertilizers, the more production.

Chemical fertilizer contains high nitrogen, phosphorus and potassium components, and vegetables relative to other crops, indeed "fertilizer-resistant", within a certain range, on the basis of sufficient organic fertilizer, increasing the amount of chemical fertilizer will indeed increase production, but more than a certain amount, the yield and quality of vegetables will be reduced, and at present, many vegetable farmers into the misunderstanding that the more fertilizer is applied, the better, can not extricate themselves. In the production of excessive chemical fertilizers, the burning of roots, yellow leaves, and leaf edges abound in greenhouses, and the resulting increase in soil compaction salt content is also a common problem.