With the increasing attention paid to the safety of agricultural products, organic fertilizer has become an important ingredient in agricultural production. However, some people say that the effect of organic fertilizer is not so good. What is the truth? Recently, the reporter interviewed Wan Fuping, a senior agronomist at the Agricultural Broadcasting School of Ningxia Hongchen Group Corporation. He said that the effectiveness of organic fertilizer use is not only in accordance with national standards, but also related to the correct publicity and guidance of distributors and manufacturers on user usage methods. Reasons for the poor effect of using organic fertilizer: There are many reasons. There are two major categories here. The first category is the reason for fertilizers, and the second category is the reason for use. Category 1: Reasons for fertilizers 1. Nutrients Due to the low nutrients of the raw materials or the fermentation production process, some companies have fermented organic fertilizers and their nutrients are not qualified. In addition, some factories do not even have laboratories, and a batch of products entered the market in this way. 2. The pH value changes greatly during the fermentation process. If the fermentation process is not well controlled, it may be found that the pH is above 8.5 or below 5.5. Especially overacid products can cause crop growth or death. 3. Chloride ion content Some manufacturers use ammonium chloride-containing chlorinated fertilizers added to organic fertilizers to increase the nitrogen in the total nutrients, which also leads to increased chloride ion content, affecting the growth of crops. 4. Salt content Generally speaking, domestic sludge, kitchen waste and other raw materials have high salt content, and crops that are not tolerant to salt will have yellow leaves, fallen leaves, wilting, and death. 6. Humic acid fresh raw materials hardly contain humic acid. Humic acid is continuously produced during the production of organic fertilizer fermentation, especially at high temperature fermentation (greater than 50 ℃). Humic acid can improve the stress resistance of crops, promote production and promote germination. 8. Heavy metals Heavy metals will accumulate in plants and eventually concentrate on people through the food chain, causing harm to people. At the same time, heavy metals can also cause damage to the growth of crops. 9. Many manufacturers of harmful microorganisms failed to reach a certain temperature due to the process level during the production of organic fertilizers, and most of the roundworm eggs and coliforms were not killed, which affected the healthy growth of crops. The second category: the reason for using the method 1. As a top dressing user, the organic fertilizer is used as a chemical fertilizer to top up the fertilizer, and the soil cannot be covered in time. The fertilizer is only on the surface of the soil and cannot be in full contact with the soil, and it can not improve the soil. Coupled with the sun and rain, beneficial microorganisms can not work, nutrients will also be lost with water, and the functions of organic fertilizer buffering capacity, loose soil, water and breathability, heat preservation and fertilizer protection are not reflected. The best method of organic fertilizer should be used with inorganic fertilizer as the base fertilizer, preferably mixed with soil, but at least (organic fertilizer) should also be not exposed on the surface of the soil, such as furrow hole application. 2. Direct contact between organic fertilizer and crops Some users worry that the fertilizer effect is not enough, or want to see results as soon as possible. When using organic fertilizer and crops in direct contact, it will cause burning seedlings and serious death of trees. 3. Fresh manure used directly Fresh manure contains a large number of germs and parasites, direct use will harm fruit trees. Disclaimer: Some articles of this website are transferred from the Internet. If the legal rights of third parties are involved, please inform this website for processing. phone
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5. The cation exchange capacity does not have decomposed organic fertilizer or even the manure sold in the sun. The cation exchange capacity is extremely low, which does not provide the buffer effect it should have. On the contrary, it will also harm the buffer effect of the soil itself, causing crop growth obstacles. .
7. Small-molecular fatty acids Generally speaking, small-molecular fatty acids exist in unripe materials, such as fresh chicken manure. The harm it brings is: small molecular fatty acids will inhibit seed germination and root growth.