Rice field breeding method for crayfish procambrarus clarkii

Abstract

The invention relates to a method for cultivating the Krause's crayfish, comprising that cleaning the field, cultivating the parental crayfish, cultivating the seed and taking off, cultivating the rice. The invention is characterized in that the cultivation of parental crayfish is processed in the surrounded groove, which has an anti-jump device and near the ground arranges seed holes at 0.8-1.2cm diameter; the crayfish seed can pass through the holes into the field. The invention can pre-cultivate the parental crayfish to avoid damaging the rice. And the invention can obtain many benthic fauna as the bait of parental crayfish, seed, or the like.

Description

technical field [0001] The invention relates to a method for cultivating freshwater economical shrimps. Background technique [0002] Procambarus clarkii is native to North America and is commonly known as freshwater crayfish. It belongs to Arthropoda, Crustacea, Crustacea, Decapod, Cricketidae in classification. It was introduced to my country in 1929 and has been widely distributed in my country. Due to the rapid growth of the market consumption and export processing quantity of Procambarus clarkii, the number of its wild resources is decreasing sharply. Therefore, increasing the production of Procambarus clarkii through artificial breeding has become an important way to meet the needs of processing, export and consumption markets. one of the important ways. At present, the rice field culture method of Procambarus clarkii usually includes three culture modes: 1. the mode of releasing seed shrimp; 2. the mode of releasing egg-bearing shrimp; The first stocking mode is to ...

AI Technical Summary

Problems solved by technology

The farming method of opening the ring ditch has a large amount of farmland clearing engineering, high investment, time-consuming and laborious; although the farming method of not opening the ring ditch has a small amount of engineering and relatively low investment, fishing is very difficult and the output is low.

If the above three breeding modes are stocked with broodstock or juveniles in advance, they will cause harm to rice seedlings. At the same time, rice spraying and field roasting will have a greater impact on Procambarus clarkii

Moreover, most of the raised Procambarus clarkii are caught and marketed in the following year, and the growth period is relatively short. In addition, in order to avoid damage to the juvenile shrimp when transplanting rice seedlings, the no-tillage method is usually used, which is not easy for farmers to accept.

Due to the no-tillage method used in the above three modes, most of the organic fertilizers are applied on the surface of the paddy fields, causing serious fertilizer loss and not conducive to the cultivation of bait organisms.

The stocking time of broodstock or juvenile shrimp is mostly 2 to 3 months after fertilization. At this time, the organic matter in the fertilizer has already decomposed, and the bait in the paddy field is seriously insufficient, which has a great impact on the growth of juvenile shrimp and the improvement of aquaculture production.

Due to the existence of the above-mentioned defects, the yield of the existing Procambarus clarkii paddy field culture method is low, and the benefit is not ideal, which is one of the reasons why the existing culture mode is difficult to promote in a large area

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