CATDOLL : CATDOLL: What are the advantages of raising crabs in rice fields?

What are the advantages of raising crabs in rice fields?

Crab farming in rice fields is a systematic project with comprehensive benefits in current agricultural production. It plays an important role in stabilizing grain supply, increasing production and income, guiding farmers to become rich, and revitalizing the rural economy. Its advantages are:

(1) It is beneficial to the growth of rice, does not reduce rice yield, and improves quality and efficiency

River crabs feed on weeds, duckweed, benthic organisms in rice fields, and kill a large number of pests such as rice leafhoppers and borers. Their excrement can fertilize the fields. According to measurements, the organic matter in the soil of the cultivated layer of rice fields where crabs have been raised for several consecutive years has increased by about 1 times. This promotes the growth of rice and increases rice yields. In planting, the large ridge double-row technology is adopted, and rice is planted "without missing a row or a hole". The marginal effect of rice is used to increase rice yield by 5% to 17%, and it is "organic rice". The price per kilogram has increased by 0.2 yuan, and the cost has decreased by more than 10%.

(2) Rice fields provide a good habitat for river crabs, promoting their growth

The shallow water and light-shielding of rice fields are conducive to the hiding and molting of river crabs. Shallow water has abundant bait organisms, which is conducive to the growth of river crabs. In the later stage, enhanced nutrition measures are adopted: after the fourth molting, animal bait is added, so that the size of river crabs in rice fields is significantly increased, female crabs are more than 100 grams, male crabs are more than 150 grams, and the quality is improved. The yield of adult crabs in rice fields is 25 to 30 kilograms.

(3) Rice-crab symbiosis significantly improves economic benefits

Each acre of rice field can yield about 400 kilograms of rice and more than 25 kilograms of adult crabs, which can increase the net profit by 1,000 to 1,500 yuan.

(4) The comprehensive benefits are extremely significant

Farming crabs in rice fields closely combines planting and crab farming, which not only improves the utilization rate of land and water resources, but also stabilizes farmers' enthusiasm for growing grain, reduces production costs, reduces the use of chemical fertilizers and pesticides, and improves the quality of river crabs and rice. Not only does it significantly improve social and economic benefits, but it also has significant ecological benefits.

(5) One water for two purposes, one land for two harvests, in line with the national food security and sustainable development strategy

This technology is of great significance for ensuring the stability of my country's basic grain fields and ensuring the food security strategy. It not only saves land and water resources, but also allows rice and crabs to coexist, significantly reducing pests and weeds in rice fields. Rice is conducive to the hiding, molting and growth of river crabs, ensuring the harmony and friendliness of the rice field wetland environment, and becoming a truly resource-saving, environmentally friendly and food-safe industry.

What are the characteristics of raising crabs in rice fields?

The characteristics of rice field crab farming are as follows:

1. A model of three-dimensional farming

Rice can be grown and crabs can be raised in the same rice field, organically combining plants and animals, planting and breeding industries, better maintaining the virtuous cycle of matter and energy in the farmland ecosystem, and achieving a double harvest of rice and crabs.

2. Special breeding environment

Rice fields are shallow water environments, with only 7 cm of water in the shallow water period and only about 20 cm in the deep water period, so the water temperature varies greatly. Therefore, in order to keep the water temperature relatively stable, field facilities such as crab ditches and crab ponds are one of the necessary projects. Another feature is that the dissolved oxygen in the water is sufficient, often maintained at 4.5~5.5 mg/L, and the water is frequently circulated and exchanged, and the stocking density is low, so crab diseases are rare.

3. Open up new aquaculture waters

The model of breeding river crabs in rice fields adds new water areas for freshwater aquaculture without occupying existing aquaculture water surfaces, opening up new ways and new aquaculture waters for crab production.

4. Protecting the ecological environment is conducive to improving rural environmental sanitation

In the production practice of breeding river crabs in rice fields, it was found that after breeding river crabs in rice fields, the density of chironomid larvae in and near the rice fields was significantly reduced, up to about 50%, and the density of adult mosquitoes also decreased by about 15%, which is beneficial to improving people's health level.

5. Increase farmers’ income

The experimental results of breeding river crabs in rice fields show that after using rice fields to breed river crabs, the average yield of rice fields not only did not decrease, but increased by about 10% to 20%. At the same time, a considerable number of adult crabs can be harvested per acre of land, which relatively reduced agricultural costs and increased farmers' actual income.

‍‍Raising crabs in rice fields is a systematic project with comprehensive benefits in current agricultural production. It plays an important role in stabilizing grain supply, increasing production and income, guiding farmers to become rich, and revitalizing the rural economy. Its characteristics are: (1) It is conducive to the growth of rice, does not reduce rice production, and improves quality and efficiency. River crabs feed on weeds, duckweed, and benthic organisms in rice fields, and kill a large number of pests such as rice leafhoppers and borers. Their excrement can fertilize the fields. According to measurements, the organic matter content of the soil in the arable layer of rice fields that have been raised with crabs for several consecutive years has increased by about 1 times. This promotes rice growth and increases rice yield. In planting, the large ridge double-row technology is adopted, and rice is planted "without missing a row or a hole", which is beneficial to the marginal effect of rice. Rice production has increased by 5% to 17%, and it is "organic rice". The price per kilogram has increased by 0.2 yuan, and the cost has decreased by more than 10%. (2) Rice fields provide a good habitat for river crabs and promote their growth. Shallow water and light-shading in rice fields are conducive to the hiding and molting of river crabs. Shallow water has a lot of bait organisms, which is conducive to the growth of river crabs. In the later stage, enhanced nutrition measures are adopted: after the fourth molting, animal bait is added, so that the size of river crabs in rice fields is significantly increased, with female crabs weighing more than 100 grams and male crabs weighing more than 150 grams. In addition, the quality is improved, and the yield of adult crabs in rice fields is 25-30 kilograms. (3) Rice-crab symbiosis significantly improves economic benefits. About 400 kilograms of rice can be harvested per mu of rice field, and more than 25 kilograms of adult crabs can be harvested, which can increase the net profit by 1,000-1,500 yuan. (4) The comprehensive benefits are extremely significant. Crab farming in rice fields closely combines planting and crab farming, which not only improves the utilization rate of land and water resources, but also stabilizes farmers' enthusiasm for growing grain, reduces production costs, reduces the use of fertilizers and pesticides, and improves the quality of river crabs and rice. Not only the social and economic benefits are significantly improved, but also the ecological benefits are significant. (5) - Water is used for two purposes, and one land is used for two purposes, which is in line with the national food security and sustainable development strategy. This technology is of great significance for ensuring the stability of my country's basic grain fields and the food security strategy. It not only saves land and water resources, but also allows rice and crabs to coexist, significantly reducing pests and weeds in rice fields. Rice is conducive to crabs hiding, molting and growing, ensuring that the rice field wetland environment is harmonious and friendly, and becoming a truly resource-saving, environmentally friendly and food-safe industry.

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Crab farming in rice fields is an emerging aquaculture industry and a form of intensive management. It can reduce the application of fertilizer to rice and increase rice production, so that crabs and rice can have a double harvest. Raising river crabs in rice fields has the characteristics of low investment, convenient management and high economic benefits. Generally, crab seedlings are released and raised for 16 to 17 months, and the yield of adult crabs per mu can reach 50 to 80 kilograms. If young crabs are raised for one year, the yield of adult crabs per mu can reach 50 to 70 kilograms, and the output value per mu can reach more than 10,000 yuan. According to research, the soil organic matter in the 0 to 15 cm tillage layer of rice fields that have been raising crabs for three consecutive years has increased by about 1 time. It can be seen that the structural model of rice and crab symbiosis has significant economic, social and ecological benefits. The development of river crab farming in rice fields in cities and suburbs will play a positive role in serving the "vegetable basket" project and rural poverty alleviation and prosperity. For raising crabs, you should choose a single-season rice field with abundant water sources, clean and pollution-free water, convenient water intake and drainage, and good water retention. Once the previous crop is harvested and left the field, you should plan and renovate it in a timely manner.