At present, wheat has reached the harvesting period and even started planting summer maize. In the summer corn fertilization method, many farmers have misunderstandings, especially the “one shelling†fertilization method has brought a lot of losses to farmers. In response to questions about how to fertilize summer corn, we invited the director of the Soil and Fertilizer Institute of Shandong Academy of Agricultural Sciences, Cui Rongzong, to give you detailed answers.
One-time fertilization has become a habit of farmers in many places in the province.
Cui Rongzong introduced that the technical content of corn one-time fertilization is high, and there are several points that need attention from farmers. First of all, in the selection of fertilizers, it is necessary to use large brands of good quality fertilizers, preferably with slow release fertilizer or stable fertilizer.
Cui Rongzong introduced that the controlled release fertilizer also contains some quick-acting components. Phosphorus, potassium and a part of nitrogen are quick-acting. Only a part of nitrogen is in the form of nitrate nitrogen, which is a slow-acting nitrogen fertilizer. These two fertilizers are very helpful for the growth of corn and can well meet the nutritional needs of fertilizers in all growing seasons.
In addition to the selection of good fertilizers, we must pay attention to the spacing of corn fertilization due to the large amount of one-time fertilization. If the distance of fertilization is not allowed, it is easy to cause corn root burning. There is also a lack of fertility in the late stage of fertilization. If the summer weather is relatively dry or encountering disaster-hit corn, it is very easy to cause de-fertilization.
Cui Rongzong said that the above problems are rarely caused by two fertilizations and that the fertilized corn is easy to produce high yields. For the farmers, the technical content of the two fertilizations is lower. The first fertilization can be carried out with the corn seed fertilizer, and the 15-15-15 compound fertilizer of 30-40 kg of the ridge can be applied per mu.
In the period of corn big bell mouth, 30-40 kg of urea is applied per mu, and the amount of fertilizer applied twice is about 80 kg. "Now some farmers' friends still have some wrong fertilization ideas. The more fertilizers are pursued, the better they are afraid that the crops are not enough to eat." Cui Rongzong said that excessive fertilization may not only cause pollution waste but will have a counterproductive effect. Later corn is easy to fall or late. .
The biggest benefit of two fertilizations is the higher utilization of fertilizer. Corn generally requires a small amount of fertilizer at the seedling stage, and the demand for fertilizer begins to increase after the tipping.
Rainwater in the late dry season is likely to increase in most parts of the province this year. Cui Rongzong introduced that corn can be slightly arid in the early stages of growth. Drought will stimulate the roots of the corn to find water to make the corn more roots. The roots will lay the foundation for the later corn growth. On the one hand, it will enhance the drought resistance of the corn. On the other hand, it will enhance the ability of the roots to absorb nutrients and at the same time enhance the lodging resistance.
"The degree of drought should be properly grasped. Generally, the corn is stretched at noon in the morning and the leaves in the evening. If the leaves are difficult to stretch in the morning and evening, watering should be done in time." Cui Rongzong said.
In addition, the degree of drought can be controlled by the deep soil environment. The shovel excavates 20 cm to observe the dryness and wetness of the soil. If the soil is pinch below 20 cm, it is necessary to add water in time to prevent the drought from affecting the growth of the corn.
Professional business card
Cui Rongzong: He is currently the director of the Agricultural Precision Technology Research Office of the Soil and Fertilizer Institute of Shandong Academy of Agricultural Sciences. He is also a council member and deputy secretary general of the Shandong Soil Society.
He graduated from the Department of Soil Chemistry of Beijing Agricultural University with a bachelor's degree in agronomy in 1984. Mainly engaged in plant nutrition and fertilization farmland nutrient precision management and research on new fertilizer development. Since joining the work, he has hosted and participated in more than 10 national, provincial and ministerial level and international cooperation research projects, including 1 national 948 project, 1 research and transformation fund of the Ministry of Science and Technology, 1 scientific and technological research project in Shandong Province, and international cooperation projects. 1 item, etc.
He has won 2 second prizes of National Science and Technology Progress Award, 2 second prizes of Shandong Science and Technology Progress Award, 2 third prizes of Shandong Science and Technology Progress Award, and 1 national invention patent. He has published 25 academic papers; he has participated in the compilation of the Chinese Fertilizer Practical Handbook, the New Technology of Vegetable Fertilization, and the Natural Science Guide Series.
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