A farmer asked the little helper such a question: When planting corn, no bottom fertilizer is applied, and after the corn emerges, or when it reaches the big bell stage, will it be okay to carry out top dressing? Will it affect the yield?
As we all know, according to the planting habits of most farmers, when planting corn, they take the method of bottom fertilizer + top dressing, such as 100 kg of high-nitrogen compound fertilizer per mu, and then apply 25-30 kg of urea when the big flare is staged.
If you don't use base fertilizer, only apply about 100 catties of compound fertilizer in the big bell period, will this planting method work?
Let's start with the benefits of base fertilizer
The first point is to provide long-lasting nutrients. The fertilizer in the base fertilizer slowly breaks down and releases nutrients, providing stable and long-lasting nutritional support throughout the growing season of the corn. It not only contributes to the healthy growth of corn seedlings, but also lays a solid foundation for subsequent growth and development.
The second point is to improve the soil. The organic matter in the base fertilizer can improve the physical and chemical properties of the soil, increase the water retention capacity and air permeability of the soil, improve the fertility and microbial activity of the soil, and contribute to the development of maize roots and the absorption of nutrients.
The third point is to promote root growth. The nutrients in the base fertilizer can stimulate the growth and development of the corn root system, making it more robust and developed, and the strong root system can better absorb the water and nutrients in the soil, supporting the growth and development of the corn plant.
The application of base fertilizer is usually carried out before land preparation and ploughing, and the fertilizer is spread on the soil by a fertilizer applicator or by hand, and then mixed with the soil after ploughing to ensure that the nutrients penetrate fully into the root growth range. Corn can get sufficient nutrients at the early stage of growth, which lays a good foundation for subsequent growth.
Of course, there are many farmers who adopt the method of planting and fertilizer at the same time, no longer spreading before land preparation, but when sowing seeds and fertilizer are applied to the soil at the same time after land preparation, the utilization rate of base fertilizer can be improved. However, it is necessary to pay attention to the spacing of seed fertilizer, which is recommended to be more than 8cm.
Let's look at the benefits of top dressing
The first point is to supplement nutrients. In different stages of corn growth, its nutrient requirements will change, and top dressing can supplement the required nutrients in a timely manner according to the growth of corn and soil fertility to meet the needs of its growth and development.
The second point is to promote growth and development. In the critical period of maize growth (such as jointing stage, large flare stage, etc.), top dressing can provide sufficient nutrients to promote the growth of maize stalks, leaf expansion and ear development, thereby improving the yield and quality of maize.
The third point is to adjust the nutrient balance. Through top dressing, the balance of various nutrients in the soil can be adjusted, the lack or excess of certain nutrients can be avoided, and the normal growth of corn can be ensured.
Top dressing is mainly in the process of corn growth, according to its growth needs and soil fertility status of supplementary fertilization. For example, topdressing at the seedling stage can promote the development of roots, seedlings, leaves and stalks of maize, and topdressing at the ear stage can meet the needs of maize for the largest nutrient absorption, the largest absorption intensity and the fastest nutrient absorption, which is conducive to grain filling, increasing the 1000-grain weight, and then improving the yield and quality of maize.
The potential problem of not using a base fertilizer and only using top dressing
First, nutrient availability is unstable. When planting corn, if you only use top dressing without base fertilizer, corn may not receive sufficient nutrient supply in the early stage of growth, resulting in slow growth or stunted growth. For example, the common seedlings are weak, the seedlings are yellow, and the plants are short, etc., which can be about half smaller than the plots with normal application of base fertilizer. From the beginning of planting, it lost at the starting line, and the final yield can be imagined.
Second, soil fertility is declining. Without the improvement effect of base fertilizer, the physical and chemical properties of the soil may gradually deteriorate, affecting the growth and yield of maize. After the application of base fertilizer, especially for the plot where the soil itself is relatively poor, it can provide sufficient nutrients for the newly sown corn, if the bottom fertilizer is not used, it will not grow normally in the early stage of growth, and even lack of seedlings and broken ridges.
Third, fertilizer is wasted. In the case of not using base fertilizer and only using top dressing, the amount of top dressing is bound to increase, and after top dressing, the nutrient release is faster, if the application is excessive or the timing is improper, the utilization rate of fertilizer will be reduced, and it is easy to cause the waste of fertilizer. In addition, to a certain extent, it also increases the probability of fertilizer damage.
Based on the above, the rational use of base fertilizer and top dressing is very important in corn planting. The base fertilizer provides basic nutrients and soil improvement for the growth of maize, while the top dressing is supplemented according to the growth needs of maize and soil fertility status. The combination of the two can better ensure the healthy growth and high yield and quality of corn.
The little helper personally suggests that when planting corn, it is advisable to base fertilizer + top dressing, not only top dressing and giving up base fertilizer, even if the amount of top dressing is very large, it may not have good results.
What do you think about this?