The most important role of applying organic fertilizer is to regulate soil and fertilize the soil. It is a way to improve soil physical, chemical, and ecological properties from Heshan. It is similar to the "tonics" of the soil and can make the soil fundamentally strong.
Fertilizer is like a "symptomatic drug." What element is lacking in the soil? What kind of chemical fertilizer is applied? It is effective. But after applying chemical fertilizers all year long, you will find that today's lack of soil lacks that tomorrow, and then it is today to open this "symptomatic medicine," and to open that "symptomatic medicine" tomorrow, the efficacy is indeed significant, but the "disease" has been increasing. more. Some people said that simply I am opening an elixir to the soil, and all the elements will not live together. In fact, this is a major drawback of China's agriculture now! This is how the ordinary peasants plant the land. "I don't know what the soil lacks. I give him everything."
There are three disadvantages to this:
1, the culprit of environmental pollution. The nitrate content in groundwater rises sharply and the water body becomes eutrophic. The more terrible aspect of agricultural pollution than industrial pollution is that agricultural pollution is an over-sized non-point source pollution that all farmland in the country is undertaking. Once the pollution cannot be cured!
2, fertilizer waste, not worth the candle. Excessive application of chemical fertilizer not only increases the investment cost of agriculture, but also tends to lead to crops that are long and mad, and the nutrients of fertilizers all supply crop stalks. Instead, they are not necessarily useful for fruit and sometimes harmful.
3. The soil is "dead". The long-term, large-scale investment in fertilizers leads to soil hardening, hardening and acidification, a large number of soil microbial death, a sharp drop in buffering performance, and a collapse of the soil ecosystem. How can this soil yield? How can there be high-quality crops?
However, organic fertilizer is completely the opposite. In the absence of chemical fertilizers, farmers have been using farmhouses for fertilizing land, and the soil can produce as well. The output is not high but the quality is very good. Now we have continuously developed high-tech bio-energy organic fertilizers, which have not yet been widely used. In fact, the key to the wonderful effect of organic fertilizer is to start with, improve the soil, regulate the soil, increase the "constitution" of the soil, and reduce the chance of getting sick, so you don't have to be busy with "symptomatic drugs" every day. .
Some people may ask that there is no need to use chemical fertilizers at all. Do you not use "symptomatic drugs" at all? The answer is perfectly fine, no problem! Today's organic foods and organic vegetables are just like that. Before the 1980s, when the fertilizer was not fully popularized, our food was all so grown! But the central question is whether it will reduce production without fertilizer. This question has already been given persuasive data from a scientific perspective.
Professor Li Ji of China Agricultural University's long-term positioning experiment shows that as long as the crop can provide "enough" organic fertilizer, coupled with reasonable agricultural management measures, crop yields will not be reduced, and the quality is much better than the quality of fertilizer planting. However, the cost of planting organic fertilizer alone is high, which is also an important reason for the high price of organic foods. Looking at the current situation in China, to support a population of more than one billion, we still need to pay equal attention to both yield and quality. The most suitable method for fertilizing the current state of agricultural production in China is organic and inorganic. If we pursue higher quality, we can also organic + inorganic + biological fertilizer. In this way: change soil + nutrition + repair to live together!
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