Q: Some peasants reported that "there are more fertilizers applied and the land has changed." What does this mean?
A: The meaning of this sentence is that the first 1 to 2 years of additional nitrogen fertilizer can significantly increase the number of grains. If more nitrogen fertilizers are applied in the future, the grain yield will be reduced, and only when the amount of fertilizer is further increased can it be maintained. The original production may have increased slightly. When we think about it, there is a certain truth in this statement, but it is by no means a change in the "beggar".
Question: Then, if more fertilizers are applied and the land changes, what causes it?
A: I think one explanation is that nutrient imbalance is caused by improper fertilization. Many farmers only know that increasing the amount of nitrogen fertilizer every year to increase production, but do not know the balance of nutrients is the key to improving fertilizer efficiency, but also mistakenly believe that the application of more fertilizer, the ground has changed. In essence, this is the consequence of neglecting the balanced supply of a variety of nutrients. For example, in the case of insufficient phosphorus supply, partial application of nitrogen fertilizer, nitrogen and phosphorus nutrient imbalance, the crop can not fully absorb nitrogen, resulting in a significant decline in the utilization of nitrogen fertilizer, and thus mistakenly believe that "the ground to change".
Q: Is there any other explanation?
A: Another explanation is that fertilizer is not targeted. Crop growth requires the absorption of 16 essential nutrient elements. Applying chemical fertilizers can only supplement several of them. Other nutrients needed for crops are drawn from the original “librariesâ€. After the crop is harvested, the nutrients absorbed by the crop are taken away with the agricultural products. This way, year after year, some nutrients in the soil will be lacking. If the fertilization is still applied according to the original quantity and proportion, the crop cannot meet the nutrient requirements. Balance requirements, naturally can not reach the original production, in order to increase production must be more fertilization, so mistakenly believe that more fertilizer applied, the ground has changed.
Q: What lessons should farmers learn from this argument?
A: It should be said that "there is more misapprehsion of chemical fertilizers and changes in the way the land is changed." Partial application of nitrogen fertilizer is unscientific. The correct approach is to increase the level of fertilization while paying attention to the balanced supply of nutrients and take the road of balanced fertilization. This is the key to rational fertilization.
Q: How can farmers do balanced fertilization in the future?
A: For high-yielding fields, from the point of view of nutrient balance, it is often more important to adjust the ratio of nutrient and fertilizer than to simply increase the amount of fertilizer, and the effect of increasing production is better.
In order to effectively achieve balanced fertilization, it is best to measure soil fertilization, through the soil test to timely understand the changes in soil available nutrient content, especially the long-term application of diammonium phosphate field, the soil available phosphorus content increased rapidly. Therefore, according to the new situation of soil nutrient changes, timely adjust the fertilization formula, so that the ratio of fertilization and soil nutrient is in harmony with the soil supply conditions, so as to receive a good effect of balanced fertilization.
Expert tips
â— "Many chemical fertilizers have been applied, and the land has changed." This is actually caused by the imbalance of fertilization nutrients.
â— The key to rational fertilization is balanced fertilization. The practice of partial application of certain fertilizers is unscientific.
(Professor Chen Luoshou of the College of Agricultural Resources and Environment, China Agricultural University)
Diabetic Test Strips,Reagent Strips For Urinalysis,Urine Test Strip,10 Parameter Urine Test Strips
Changchun Medicon Technology Development Co., Ltd , https://www.teststrip.pl