Crayfish fresh water culturing method

Abstract

The invention discloses a method of culturing lobsterlings in fresh water, comprising: excavating an enclosed culture channel at a water inlet of a rice paddy; secondly, forming a culture region around the channel by mesh, building anti-escaping facilities at the water inlet and the water outlet of the rice paddy, for preventing external infraction and self escape of shrimps seedlings; thirdly, applying enough ground fertilizer, cultivating the parent shrimp after and before transplanting rice seedlings, sterilizing the channel before pasture, planting water weeds in the channel after one week; fourthly, culturing the parent shrimp of 10-22 kg per mou, and channel density 5-25 / m2; fifthly, catching for sale. The invention method is simple, convenient in operation, low in cost, high in production and good in quality.

Description

technical field [0001] The invention relates to the technical field of shrimp cultivation, and more specifically relates to a method for freshwater cultivation of crayfish. Background technique [0002] Crayfish originated in North America and are commonly known as freshwater crayfish. In terms of classification, they belong to the crustacea Arthropoda. It was introduced into China after 1929 and has spread all over the country. With the continuous improvement of people's living standards, the market consumption and export volume are increasing rapidly, but the natural wild resources are far from meeting the demand. Therefore, it is the only choice to meet the increasing demands of processing export and market consumption through artificial scientific freshwater aquaculture. At present, there are three main methods of crayfish farming: 1. The form of feeding shrimp, 2. The form of feeding shrimp, and 3. The form of raising shrimp. The first form of stocking is to stock se...

AI Technical Summary

Problems solved by technology

The first form of stocking is to stock seeded shrimp about one month before the rice harvest from July to August. This period is not only high temperature but also the peak season for rice use of pesticides, which will easily lead to a decline in the survival rate of lobsters, and the larvae lobsters that come out of eggs Growth rate is slowed down for an extended period of time

The second form is to release egg-bearing shrimp after the mid-season rice is harvested in September-October. The growth period of juvenile shrimp is relatively short, and it may be extended to May next year before they can be sold, and the number of high-quality shrimp sold is not as high as that of high-quality shrimp. Specifications

The third form is stocking juvenile shrimps after harvesting of mid-season rice, but the number of juvenile shrimps that can be purchased is not large, and the purchase price is high, and the production cost increases simultaneously, which also leads to the reduction of breeding benefits and inadvertently causes the breeding process. vicious circle

The farming method of opening ditches will lead to an increase in the amount of cleaning work for rice fields and a relatively increased investment, which is time-consuming and laborious; although the form of no-ditching has a small amount of work and lower investment, it increases the difficulty of fishing, and the output is corresponding reduce

Judging from the actual farming situation, the above three farming forms can neither be avoided nor easily done. This is one of the important factors that directly hinder the large-scale promotion of crayfish farming in rice fields.