Spring is a critical period for wheat growth, and topdressing plays a vital role in wheat growth and yield formation. So, what fertilizer is good for spring topdressing of wheat?
First of all, we need to understand the characteristics of wheat spring growth. Spring is the rapid growth period of wheat, and the roots and leaves of wheat gradually increase, and the demand for nutrients gradually increases. Therefore, nitrogen fertilizer should be the main fertilizer for spring topdressing, supplemented by phosphorus and potassium fertilizer to meet the nutrient demand of wheat.
Secondly, we need to choose a fertilizer that is suitable for spring topdressing of wheat. Commonly used fertilizers include urea, compound fertilizer, diammonium phosphate, etc. Among them, urea is a fast and effective nitrogen fertilizer, which can quickly improve the nitrogen nutrient level of wheat and promote the growth of wheat. Compound fertilizer contains a variety of nutrients, which can meet the needs of wheat for a variety of nutrients. Diammonium phosphate is a compound fertilizer containing nitrogen, phosphorus and potassium, as well as trace elements, which has a good role in promoting the growth and development of wheat.
When applying fertilizer, we need to determine the amount and time of fertilization according to soil fertility and wheat growth. Generally speaking, spring topdressing should be carried out at the jointing stage of wheat to booting stage, the amount of fertilizer should be determined according to soil fertility and wheat growth, generally 10-15 kg of urea or 20-30 kg of compound fertilizer per mu, and 10-15 kg of diammonium phosphate can be applied per mu.
In addition, the following points need to be paid attention to during the fertilization process:
1. Avoid over-fertilization. Excessive fertilization not only creates waste, but also pollutes the soil and the environment, and can even negatively affect the growth of wheat.
2. Pay attention to the fertilization method. When fertilizing, the fertilizer should be evenly spread between the wheat rows, so as to avoid direct contact with the wheat leaves, so as not to burn the leaves.
3. Fertilization in combination with irrigation. Spring is a critical period for wheat growth, and it is also a period of frequent drought, so fertilization should be combined with irrigation to ensure that fertilizer can be fully absorbed and utilized by wheat.
To sum up, the spring topdressing of wheat should be mainly nitrogen fertilizer, supplemented by phosphorus and potassium fertilizer, and the fertilizer suitable for wheat growth should be selected, and the amount and time of fertilization should be determined according to soil fertility and wheat growth. In the fertilization process, it is also necessary to pay attention to avoid excessive fertilization, pay attention to fertilization methods, and fertilize in combination with irrigation. Only in this way can we ensure the effect of spring topdressing of wheat and provide a strong guarantee for the growth and development of wheat and the formation of yield.