Why should we pay attention to the part where we fertilize?

1. Fertilization period

During the life of a crop, it continuously absorbs nutrients and water from the soil through its huge root system to meet the needs of different growth periods. However, crops have different demands for nitrogen, phosphorus and potassium nutrients in different growth periods. Some periods have less and some periods have more. In order to save fertilizer and improve

fertilizer efficiency

, the fertilizer effect should be optimized through the selection of fertilization period.

Most crops have two critical fertilization periods. One is called the

Nutritional critical period

, mostly in the seedling stage. For

For farmland with low soil fertility

applying

seed fertilizer

is a method to improve fertilizer efficiency. The other is called the maximum efficiency period of crop nutrition, that is, the period when crops require more fertilizer and the effect of fertilization is obvious, such as the jointing stage of wheat

and the growth period of corn

The bell mouth

stage and the cotton's

flowering boll stage

are both critical periods for topdressing nitrogen fertilizer, which can achieve better yield increase effects. However, the specific fertilization time should be determined according to the soil fertilizer supply condition and the growth condition of the crops.

2. Fertilizer location

Generally speaking, it is not just the amount of fertilizer applied and the ratio of nutrients that determines

crop yield

The method and location of fertilization cannot be ignored. Therefore, paying attention to fertilization methods and fertilization locations is also an important part of fertilization technology

. For example: whether it is

ammonium nitrogen

or

nitrate nitrogen

fertilizer or amide urea, it should be deep Applying soil mulch to a depth greater than 8 cm can reduce the loss of ammonia volatilization. Nitrate nitrogen should not be used as base fertilizer, and when used as top dressing, it should be prevented from leaching with water

. For row crops such as corn, cotton, etc., pay attention to the location of fertilizer application when topdressing. Fertilizer should generally be applied between the rows or on the side and bottom of the plant, and should not be placed at the base of the stem of the plant. , so that the fertilizer can be absorbed and utilized by crops in time.

3. Fertilization methods

In order to meet the nutrient needs of crops throughout the growth period, multiple fertilization is often required, which can generally be achieved through basal fertilizer, seed fertilizer, and top dressing. The specific fertilization method should be reasonably arranged according to the actual situation. For example, for crops with a long growth period such as wheat and

spring corn

, in addition to applying sufficient base fertilizer, top dressing should be carried out in stages; for crops with a short growth period (

Early rice

, vegetables, etc.) can adopt the method of heavy application of base fertilizer and early top dressing; for farmland with poor soil fertility, in addition to applying more organic fertilizer

In addition to being used as base fertilizer, the rational application of seed fertilizer is of great significance, and top dressing must be carried out appropriately; for

wheat stubble

corn, due to rush harvest,

If there is too little time to apply basal fertilizer during the rush to plant, you can use early top dressing and heavy application of high-nitrogen fertilizer.

The choice of fertilization method must be based on the understanding of crop growth and nutritional characteristics, as well as local soil, climate and cultivation techniques. It varies from place to place and must be reasonably matched to form a synergy.

fertilization system.