Eight misunderstandings in the use of chemical fertilizer! It's because we don't know each other correctly that we can't use fertilizer well!

The major nutrient elements nitrogen, phosphorus and potassium in soil usually can not meet the needs of crop growth, and need to be supplemented by chemical fertilizers containing nitrogen, phosphorus and potassium. However, there are many misunderstandings in many farmers' understanding of chemical fertilizer use technology, which often lead to money spent time but can not effectively play the fertility of chemical fertilizer, and even some misunderstandings will cause damage to the land. Let's take a look at the following eight misunderstandings. Do you also exist?

1. Chemical fertilizer is a man-made chemical product, and the application of chemical fertilizer is harmful to the environment, wild animals and human beings.

Chemical fertilizer is actually a substance that plants can absorb, also known as "plant nutrition". Nitrogen, phosphorus, potassium, sulfur, and other nutrients in chemical fertilizers are the same as those in our bodies and in food, and chemical fertilizers are also non-toxic. The elements of nitrogen, phosphorus and potassium in chemical fertilizer all come from the air or land, and they are natural substances that exist in nature. The production process of chemical fertilizer is a process of transforming nitrogen, phosphorus and potassium in nature into substances that can be absorbed by crops.

two。 Since there are elements such as nitrogen, phosphorus and potassium in nature, there is no need to apply chemical fertilizer.

The nutrient elements in nature are not comprehensive, nor are they exactly what plants need. Nature can only provide limited plant nutrition, if it only depends on the natural soil, it will take decades of accumulation to make the organic matter in the soil can meet the nutrients needed by plants. If planted on natural land, one season of farming may consume decades of nutrient accumulation in the land. Therefore, the application of chemical fertilizer is a necessary means to supplement nutrients in the soil.

3. Organic agriculture does not use fertilizers, especially chemical fertilizers

At present, there is no recognized and strict definition of organic agriculture. Organic agriculture also uses fertilizers, mainly natural and organic fertilizers. Such as the European organic agriculture regulations: allow the use of phosphate rock, potassium ore, do not allow the use of calcium, heavy calcium, China's green food AA standards only allow the use of natural and biological fertilizers, A standards provide limited use of chemical fertilizers. In fact, the regulations on the use of fertilizers in organic agriculture are also puzzling. For example, European institutions that set standards for organic agriculture think that natural mineral fertilizers are purer and harmless to the environment. AA green food in China is only allowed to use natural fertilizers (such as phosphate rock, plant ash). In fact, after chemical processing of natural minerals, most of the heavy metals and other impurities have been discharged with the waste residue, and the content of harmful substances has been greatly reduced. Chemical fertilizers are much purer than natural minerals and do less harm to the environment. Organic agriculture and green food production should not arbitrarily control the use of certain fertilizers, but should look at the impact of this fertilizer on the quality of agricultural products and the environment.

4. Chemical fertilizer has the same nutrients as organic fertilizer, so organic fertilizer should be used completely.

If only organic fertilizer is used, it is difficult to meet the comprehensive and sufficient nutrient needs of crops, and it is difficult to achieve high yield and high quality of crops, or it is necessary to increase the area of cultivated land. In addition, the proportion of nitrogen, phosphorus and potassium in organic fertilizers varies greatly, and it is difficult to meet the requirements of balanced fertilization only by using organic fertilizers. For example, if only organic fertilizers are applied to corn, the phosphorus nutrients should exceed 4-5 times of the corn demand. Chemical fertilizer is the easiest supplementary nutrient measure to achieve balanced fertilization. The effect of the combination of organic fertilizer and chemical fertilizer is better. Chinese farmers have always attached importance to the use of organic fertilizers, and the total amount of organic fertilizers has been relatively stable. with the increase of the use of chemical fertilizers, the proportion of organic fertilizers has decreased, but it is also at a leading level in the world. According to the Ministry of Agriculture, organic fertilizers account for about 50% of the total fertilizer use in China. The current fertilizer nutrients in the European Union are 49% of chemical fertilizers, 49% of organic fertilizers, 2% of municipal waste and waste, 68% of chemical fertilizers and 32% of organic fertilizers in the United States.

5. Organic agriculture protects the environment and wildlife, and conventional agriculture has a great impact on the environment.

Whether it is organic agriculture or conventional agriculture, the correct and effective use of fertilizers will not pose a threat to the environment, and the high yield of conventional agriculture enables us to get sufficient food on limited land, if we all rely on organic agriculture, the world's land can not feed the world's population, which requires large-scale reclamation of arable land, which will have a greater impact on the environment and wildlife.

6. Organic food is safer, healthier and of better quality.

The promotion of organic food gives people the impression that "natural" and "organic" are good. In fact, there is no definite evidence of the difference in quality between organic food and conventional food in the world, and even the World Organic Food Association and the responsible organic food manufacturers have never claimed that the quality of organic food is higher than that of conventional food. It is recognized that correct application of chemical fertilizer can improve crop quality.

7. Fertilizer loss pollutes rivers and oceans, resulting in eutrophication

Although the leaching of chemical fertilizer can cause water pollution, there are many factors of water pollution, and chemical fertilizer is not the main factor. according to the relevant data, the discharge of urban sewage is generally much higher than that of chemical fertilizer leaching. In addition, both organic fertilizer and chemical fertilizer may be leached and may cause pollution to the water body. If in the application of chemical fertilizer, the timing of fertilization and the amount of nitrogen, phosphorus and potassium should be well controlled, and scientific fertilization methods should be adopted, the loss of chemical fertilizer can be easily controlled.

8. Without chemical fertilizer, we can feed the world's population.

If there were no chemical fertilizers, the world would reduce the production of grain by 1pm 3; all forests, wildlife reserves and grasslands would have to be used as arable land; food prices would rise and living standards would decline. In short, the quality of human life will be greatly regressed. The chemical fertilizer industry has played an important role in improving agricultural output, the quality of agricultural products and people's living standards. Today, while people advocate green and environmental protection, there are many misunderstandings about chemical fertilizer. The departments of chemical fertilizer production and use in China have the obligation to actively publicize the role of chemical fertilizer and eliminate people's negative impression of chemical fertilizer; at the same time, they should also vigorously carry out scientific fertilization and agrochemical services to guide farmers to apply fertilizer scientifically. reduce the impact of chemical fertilizer on the environment to a minimum.