Maize “Determination Formula, Package Fertilization†Program in North China
Corn in North China, "soil testing formula, package fertilizer" program requirements of corn fertilizer: corn yield is high, is a fertilizer and fertilizer-resistant crops. The nitrogen, phosphorous and potassium nutrients in the growth process of maize require nitrogen to be the most, followed by potassium, and less phosphorus. Experiments have shown that for every 100 kilograms of corn grain produced, spring corn needs to absorb 2.9 kilograms of nitrogen, phosphorus 1.34 kilograms, potassium 2.54 kilograms; summer corn needs to absorb 2.5 kilograms of nitrogen, phosphorus 1.16 kilograms, potassium 2.16 kilograms. During the corn growth cycle, the big bell-mouth period is the period of peak fertilizer demand. 1, corn fertilization misunderstanding: the emergence of defermented corn growth late, showing that the corn grain is less than the top. One of the reasons for this phenomenon, commonly known as baldness, is that only the robberies and top dressings are too early, resulting in insufficient fertility at the late stage of corn growth. To solve this problem, if you have a good sensation during the seedling period, we suggest that you use fertilizers with long fertilizer and sufficient stamina to meet the fat requirements of the big bell mouth and to ensure that the fertilizer will not be deferred later. 2. Disregard Potash: Some farmer friends only use nitrogen fertilizer (ammonium carbonate, urea) or nitrogen phosphate fertilizer (Diammonium) in corn fertilization, and some farmers’ friends say: I have used such fertilizer for corn for so many years. The long one is good, but now the output is not enough, because the fertilizer is not as good as it used to be. What needs to be pointed out here is that it is not because of fertilizers. Instead, we use N and P fertilizers to produce nitrogen and phosphorus in the soil. However, there is a serious shortage of potassium supply capacity and some trace elements are lacking. This leads us to use a lot of fertilizer, but the output does not go up. Therefore, we propose to increase the use of potassium fertilizers and trace element fertilizers, which will significantly improve the ability of drought resistance, locust resistance, and lodging resistance of corn. The effect of increasing yields cannot be achieved by single application of nitrogen and phosphate fertilizers. 3, the fertilization method is not scientific: to save time and effort, the use of applicator fertilization, regardless of the level of fertilizer utilization. Fertilizer application will result in the volatilization of effective nutrients and reduce the efficiency of fertilizers. Therefore, it is recommended to use the methods of hole application or furrow application as much as possible, because the fertilizer utilization rate of soil-covered fertilizers is much higher than that of surface application, which can reduce our economic investment. , and can receive good results, is the so-called more than one more harvest. Zhongde brand compound fertilizer is a good quality fertilizer. Virtue Fertilizer (Yantai) Co., Ltd. is a German-owned company. The company produces Virtue Brand Fertilizer specially designed by the German agricultural experts for the design of rural areas in China. There are two series of available fertilizers and long-term fertilizers. The outstanding characteristics of the long-term fertilizers in the public are: high content, complete nutrients, moderate nutrient release rate, long fertilizer effect, sufficient stamina, and high fertilizer utilization (of which the nitrogen fertilizer utilization rate is more than 20% higher than that of small granule urea). Formulas suitable for corn basal fertilizers are: 19-19-19, 17-17-17; formulas suitable for corn dressing are: 30-5-14, 27-12-12, 25-13-17. This high-nitrogen and high-potassium formula is crucial to increase corn yield. It can not only meet the needs of corn for all kinds of nutrients, but also avoid waste caused by excessive application of phosphate fertilizer. The main points of corn fertilization: base fertilizer: use long-term fertilizer, can apply Zhongde brand 19-19-19, 17-17-17, about 10 kg per mu. The amount of basal fertilizer should be small (because the amount of fertilizer needed at the seedling stage is very small). It is necessary to isolate the seed fertilizer and prevent burning seedlings. Top dressing: If there is rainfall in the first 5-10 days of the big corn flare, the soil moisture is good. It is recommended to use the long-term fertilizer 30-5-14, 27-12-12, 25-13-17, 25- 5-10, 30--40 kg per mu. In this way, it is possible to ensure that there is no shortage of fertilizer in the early stage of growth, and that there is no defermented growth in the late growth stage If rainfall occurs during the first 3-5 days of the big bell-mouthing period and the soil moisture is good, it is recommended to use publicly available fertilizer 21-5-16, 35-45 kg per mu. In this way, in the case of effectively satisfying the fat requirement of the large bell-mouth period of corn, it is ensured that the fertilizer will not be deferred during the later growth period. It is suggested that qualified farmers' friends in the second round of top dressing in August, followed by Shide German 21-0-21 per kilogram of available fertilizer, which can effectively avoid the phenomenon of defertilization in the later stage of growth and thus increase production. Suggestion: When applying topdressing, spray 1-3 times of lion and horse brand compound microelement fertilizer Kang supplement fat essence (vegetin), can effectively supply zinc, iron, copper, manganese, boron, molybdenum and other trace elements, improve the disease resistance of corn , significantly increase corn production. Yantai Agricultural Production Material Technology Co., Ltd. Tel
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