Method capable of improving cultivation specification of Procambarus clarkii

Abstract

The invention relates to a method capable of improving cultivation specification of Procambarus clarkii, which comprises the following cultivation steps of: (1) digging a temporary cultivation ditch; (2) setting a fence; (3) planting waterweeds in the ditch; (4) setting a triangular hidden object in an inverted Y-shape; (5) temporarily cultivating or managing parent shrimps or shrimp seedlings; (6) planting, managing and harvesting rice; (7) planting waterweeds in a field; (8) building a temporary cultivation greenhouse; (9) carrying out over-wintering management on young shrimps; and (10) cultivating in rice fields and catching. The method is favorable for cultivating large-specification shrimp seedlings the weight of which is more than 10g so as to solve the problems of short growth period, small cultivation specification, low yield and poor cultivation benefit for the Procambarus clarkia in the rice field cultivation mode. The method has the characteristics of less investment, low cost, large specification of cultivated commodity shrimps, high yield, good benefit and the like, is convenient to operate and manage, thus being suitable for large-area popularization and applicationto a rice planting area.

Description

technical field [0001] The invention relates to a method for cultivating Procambarus clarkii, in particular to a method for cultivating Procambarus clarkii in paddy fields. Background technique [0002] Procambarus clarkii is native to North America and is commonly known as freshwater crayfish. It belongs to the family Arthropoda, crustacea, subclass Decapod crayfish (Crayfish) in classification, and was first discovered in 1929 at the junction of Nanjing and Chuzhou, Anhui. It has been found that it has been widely distributed in our country. Due to the rapid growth of the market consumption and export volume of Procambarus clarkii, the number of its wild resources is decreasing sharply. Therefore, increasing the production of Procambarus clarkii through artificial breeding has become one of the important ways to meet the needs of the consumer market. one. Procambarus clarkii paddy field farming is currently a large-scale farming method, which usually includes three far...

AI Technical Summary

Problems solved by technology

The first kind of stocking mode is to release seedling shrimp 1-2 months before the harvest of mid-season rice in July-August. It is relatively low, and most of the broodstock hatch after September, and the bred shrimp cannot grow into commercial shrimp in that year, and can only reach the market size after May of the following year, and the size of the grown commercial shrimp is generally less than 40 grams / tail; the second mode is to stock oviposit shrimp after harvesting mid-season rice in September-October. The growth period of the larvae is relatively short, and when they grow to May of the following year, most of the caught Procambarus clarkii cannot meet the specifications of commercial shrimp; the third mode The mode is to stock juvenile shrimps after the mid-season rice is harvested (September-October), but at this time most of the juvenile shrimps have already lived in caves, and the decline in fishing rate has increased the difficulty of purchasing juvenile shrimps, and the purchased shrimp seedlings can no longer grow into commercial shrimps. , so there is no benefit at all in the year of stocking

The above-mentioned paddy field shrimp farming mode often creates ring ditches, "jing" ditches and "feng" ditches in the field. This ditch cultivation method has a large amount of engineering and investment, time-consuming and laborious, and it cannot be used after ditching. Farm Machinery for Tilling and Harvesting

Large-scale ditching in rice fields will also reduce the rice planting area, which is not conducive to the improvement of rice yield

Too many ditches will cause a large number of crayfish to live in caves in the ditch, which is not conducive to the improvement of the return rate of adult shrimp, and too many remaining adult shrimp will cause damage to the newly planted rice seedlings in the next year and the germination period in the ditch. Aquatic weeds cause harm

The criss-cross ditches in the paddy fields cannot be plowed by agricultural machinery. Therefore, the above three modes usually use the no-tillage method to sow rice. The fertilizer applied on the surface of the farmland is easy to flow into the ditch and cause waste. Hypoxic accidents often occur in shrimp seedlings in summer

Due to the existence of the above-mentioned defects, the size of the commercial shrimp grown by the existing paddy field cultivation method of Procambarus clarkii is small, the yield is low, and the benefit is not ideal, which is why the promotion of the existing paddy field shrimp cultivation mode is difficult. where the

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