Conditional fertilizer can be used to test the soil for various elements before fertilization, to see the test results, specifically which element is lacking, and scientific fertilization according to the actual situation. Generally speaking, corn grows rapidly, and it is suitable to mix nitrogen, phosphorus, potassium and various trace elements reasonably.
Corn fertilization should be combined with heavy base fertilizer and corn growth and long-term topdressing. In the process of fertilization, it is necessary to pay attention to the influence of trace elements on corn yield. Just like the common wooden barrel principle, the shortest plate is often the most important factor affecting the yield. Although other nutrients are rich, the crop can not grow well. Moreover, crop yields vary with the increase or decrease of this nutrient within certain limits.
Reasonable formula fertilization techniques must be used. Formulated fertilization is the amount of nutrients that need to be absorbed according to the production target under the conditions of organic fertilizer, the ability to provide nutrients such as nitrogen, phosphorus and potassium in the soil and the utilization rate of the applied fertilizer, and calculate the required The appropriate amount and ratio of nitrogen, phosphorus, potassium and micro-fertilizer are used for fertilization.
The optimal time for fertilizing corn is usually the critical period and maximum efficiency period of corn. Formulated fertilization can increase the yield of fertilizer by adjusting the proportion of nutrient application without increasing the investment of fertilizer. Therefore, reasonable formula fertilization is an important measure to reduce the cost of fertilization and achieve high yield and quality of corn.
For the common land using conventional fertilizers, organic fertilizer can be added, fertility and fertility can be used. Multi-channel expansion of fertilizer sources, through the application of farmyard manure, straw returning, planting green manure and deep pine and other measures, strengthen farmland fertilization, improve soil structure and fertilization capacity, increase fertilizer utilization and gradually reduce fertilizer application.
According to the different soil fertility and yield targets, determine the application rates of nitrogen, phosphorus and potassium fertilizers, and increase the application of fertilizers, organic fertilizers and chemical fertilizers, nitrogen fertilizers, and other methods to fully utilize fertilizers, especially organic fertilizers and phosphate fertilizers. Effect, improve fertilizer utilization, while avoiding physiological fertility caused by blind fertilization and excessive fertilization.
Improve the structure of fertilizer varieties and improve the quality of fertilizers. Nitrogen, phosphorus and potassium combined application, organic and inorganic combination, trace element coordination; phase out low concentration of volatile ammonium bicarbonate, promote long-acting ammonium bicarbonate and compound special fertilizer; accelerate new long-acting varieties such as envelope and controlled release fertilizer, Improve fertilizer utilization efficiency. The requirements for nutrient ratio and quantity are different in different periods of corn. It is necessary to pay attention to the use of single fertilizer.
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