What are the shortcomings of the once popular “fish farming in rice fields”?

What are the shortcomings of the once popular “fish farming in rice fields”? Water resources are relatively abundant in the south, and there are also many rice fields. At this time, it is transplanting season in the South. I went to the farmland and saw the busy figures of some farmers. There are some small fish in the water, and sometimes you can catch some small fish and take them home, which is a rare delicacy. Since there is a small fish in the rice field, why don't you raise fish? This was done over a decade ago. This is for raising fish in rice fields, which are also known as "rice fields". Fish can eat some pests in paddy fields, and its feces can also be fertilized, so you can achieve fish and rice harvests.

At that time, Miyu in the rice fields was still a fire, but gradually fewer people were cultivated, and now they are basically empty. If you want to raise fish, it is usually your own shrink fish pond, or just dig a fish pond. So why promote the cultivation of rice and fish in rice fields? Are there any disadvantages?

First of all, the water source is difficult to solve. Among rice field fish, the first thing to solve is the water source problem. The water is too shallow and fish cannot survive, and the water is too deep so the growth of rice is unfavorable. Although there is a water source in most parts of the rice fields in the south, it is not water. Like from water, rivers irrigate many rice fields. However, water can also be sent to the water according to the situation, and most of the time there is no water. If there's no water, especially if you have a drought, that's trouble.

Secondly, it is inconvenient for rice fish to produce chemical fertilizers and pesticides. In the past, some farmers have experimented with minong fish, using minimal pesticides and fertilizers. They are fertilized with pesticides that are insecticides, and pesticides are rare. The fish did create the conditions, but now it is different and the farming gear is used using fertilizers and pesticides. But for fish in rice fields, fertilizing and making medicine is more troublesome. If the amount is not controlled, it will cause fish poisoning in the waters. For this amount, rice blast and disease may be more severe.

So, raising fish in what appears to be a rice field is very simple, but it is more troublesome, with serious production of rice and pioneers in rice fields. It is again a technical issue. Farmers who grow rice may, after all, be relatively wealthy in the long term and rice. But fishing is a farmer's problem. Most people meet others raising fish, and they don't have this experience, especially in rice fields, which are bigger. It is also due to lack of skills, some people may try it but then fail and I don't dare to continue. Others also learned about the difficulty of raising fish in rice, and naturally gave up the idea considering that they did not have such experience and technology.