Can the roots of crops absorb fertilizer? How to improve the effect of root fertilizer absorption?

The absorption of fertilizer nutrients by the roots of crops mainly depends on their huge roots, such as the roots of a mature rice plant, there are 200,300 roots, as many as 600,700 roots, each root has many branches, and the tip of the roots has root hairs, which is used to expand the absorption area of water and nutrients by the root system. Starting from the seedlings, the roots of crops have the ability to absorb water and nutrients. If you want to make crops absorb more nutrients, you should promote the root system to grow well, otherwise the soil will not "eat" no matter how rich the nutrients are.

In production, people take measures such as ploughing the soil, ploughing and loosening the soil, increasing fertilizer application, rational drainage and irrigation, and so on, in order to enable crops to form huge roots and strong plants, so that crops can "eat, drink, and live comfortably." so as to achieve the goal of more flowering, more fruit, and more yield.

PS: which fertilizers can not be used as extra-root topdressing?

Extra-root topdressing has the advantages of quick effect and saving fertilizer, so it is widely used by farmers. However, the effect is also slow after fertilization; in sandy soil and soil with low content of organic matter, quick-acting fertilizers such as ammonium sulfate, urea and potassium chloride are easy to be lost with Rain Water and irrigation water, although the fertilizer supply is good, but there is no stamina. As a result, "young seedlings, not old seedlings", crop yield is also low. Therefore, there should be differences in fertilization in soils with different fertilizer conservation and fertilizer supply capacity. For sandy soils with poor fertility and soils with low organic fertilizer content, in addition to applying more organic fertilizers in base fertilizers, chemical fertilizers should be applied "a small amount for many times" to avoid "seedling burning" and nutrient loss caused by excessive dosage at one time, and prevent premature senescence caused by late de-fertilization. For the clayey soil with better fertilizer conservation performance, or the soil with more organic matter, the amount of chemical fertilizer used at one time is better, which will not cause "burning seedlings" or nutrient loss, but this kind of soil "sends old seedlings but does not send small seedlings". In the early stage of crop growth, seed fertilizer or early topdressing should be applied to promote early development, and the amount of nitrogen fertilizer should be controlled in the middle and later stages of growth, so as not to cause crops to grow green or grow excessively, resulting in a reduction in yield.