In recent years, when the spring corn sowing season arrives, many farmers will discuss the issue of corn fertilization. In the past, the method of planting corn was basically based on base fertilizer + top dressing, but in recent years, the call for "bombardment" fertilization has gradually increased, so that some farmers do not know how to choose.
The method of choosing bottom fertilizer + top dressing for planting corn
The application of base fertilizer is very important for the growth of corn, before land preparation, the bottom fertilizer is sprinkled into the surface, followed by deep ploughing, harrowing and other measures, and then after the land preparation is completed, then the corn is sown.
In this way, the fertilizer and soil are well mixed to ensure that the nutrients can be absorbed by the corn to the maximum, which can not only improve the emergence rate of the corn, but also provide nutrient support for the subsequent series of growth.
Corn bottom fertilizer usually chooses high nitrogen, low phosphorus and high potassium compound fertilizer as base fertilizer, which helps to enhance the growth of corn. The amount of fertilizer to be applied depends on the fertility of the soil, and the poor soil can be fertilized more moderately, while the fertile soil can be appropriately reduced.
Under normal circumstances, most farmers apply about 100 catties per mu, and some farmers feel that their plots are relatively barren and will increase to about 150 catties. There are also some farmers who feel that their plots are fertile, and only use about 80 catties per mu to reduce the planting cost.
Top dressing plays a role in supplementing and regulating nutrient supply during the growth of corn, and top dressing is usually divided into several key periods, such as jointing stage, large flare stage and grain filling stage. Top application of nitrogen fertilizer at jointing stage can promote stem growth and young spike differentiation, while topdressing at large flare stage can effectively promote large panicle and more grains and improve the grain filling effect in the later stage.
The choice of fertilizer for top dressing, in most cases, is mainly urea, and the best time for top dressing is in the bell mouth stage, with 20-30 kg of urea per mu. Of course, if the corn leaves appear purple, red, etc., you can not only apply urea, but also supplement some phosphate and potassium fertilizers, or some foliar fertilizers with trace elements.
Planting corn chooses the method of "one-shot" fertilization
Corn "bombardment" fertilization refers to the fertilization method of applying the fertilizer needed for the entire growth cycle of corn into the soil at one time when sowing corn. This method reduces the need for multiple fertilizations, with only one base fertiliser and no more topdressing until harvest.
In the fertilization, the proportion of nitrogen fertilizer, phosphate fertilizer and potassium fertilizer needs to be reasonably matched to meet the needs of different growth stages of corn, and it is also based on high nitrogen, low phosphorus and potassium fertilizer, as for the amount per mu, many farmers can use about 150 catties.
In addition to conventional compound fertilizers, many farmers will also choose long-term slow-release fertilizers, which release nutrients slowly, which can extend the duration of nutrients as much as possible and meet the nutrient needs of corn growth.
In the process of fertilization, it is also necessary to pay attention to the depth of fertilization and the position of the seed, the fertilization depth reaches 6-8 cm, and the distance from the seed is 7-10 cm, so as to avoid the occurrence of seed burning and seedling burning.
However, the "one-bombardment" fertilization method is not suitable for all plots, such as the plots with poor water and fertilizer retention ability, because one-time fertilization may lead to nutrient loss or reduced utilization rate, and if the follow-up is not topdressed, corn will appear premature aging due to lack of nutrients.
Which of the above two ways is better?
Whether it is "one-bombardment" fertilization, or bottom fertilizer + top dressing, it has its own advantages and disadvantages. For example, from the perspective of saving trouble, time and effort, it must be better to fertilize with "one bombardment", after all, there is no need for topdressing in the future. Especially for large farmers, the labor cost of topdressing is not low, if you can save the labor of topdressing, it is equal to net profit.
In terms of farmers' fertilization habits, most farmers must be accustomed to the measures of bottom fertilizer + top dressing, after all, "one-bombardment" fertilization has gradually been known by some farmers in recent years.
So in terms of effect, different farmers will have different answers to this, some farmers use "one bombardment" fertilization, feel that the yield is not high, and think that the conventional bottom fertilizer + top dressing effect is good. However, after some farmers use "one bombardment" for fertilization, they feel that while reducing labor costs, the yield is not low, so they think that "one bombardment" is better.
The personal opinion of the little helper is determined according to local conditions and according to their actual situation. First of all, in terms of willingness, if you don't believe in the method of "one bombardment" in your heart, then there is no need to discuss it too much.
If your own plot is relatively low-lying, and in the planting process in previous years, the water and fertilizer retention ability is poor, and it is not recommended to use "one-bombardment" fertilization, which is easy to defertilize in the middle and late stages. The method of base fertilizer + top dressing, after top dressing, can timely supplement nutrients and promote the growth of corn.
If it is a farmer friend who is working abroad and does not have time to come back to top dressing in the middle, it is recommended to use the method of "one bombardment" fertilization, which has a greater advantage than no top dressing.
If the planting area is not large, the farmer who mainly farms the land has enough time to manage the corn, it is recommended to take the method of bottom fertilizer + top dressing, which can not only be the most fertile, but also cooperate with watering, and have water and fertilizer protection for corn.
Of course, if there are farmers who want to try whether the "one-shot" fertilization is good or not, and are more interested in it, then you can try a small plot of land first, don't do all the experiments in the first year, and wait for the results to make a decision.
At present, most of our local farmers still adopt the method of bottom fertilizer + top dressing, where do you go?