阅读说明：本技术 一种基于稻田的双虾种养殖方法 (A kind of double shrimp species cultural methods based on rice field ) 是由 陈虎 于 2019-09-04 设计创作，主要内容包括：本发明提供一种基于稻田的双虾种养殖方法,包括制备富硒饲料添加剂、田间改造、亲本虾投放、小龙虾越冬管理、饲料投喂、成品小龙虾捕捞。本发明通过在小龙虾常规配合饲料中添加高有机硒含量的小麦和玉米粉,形成食物链使植物有机硒聚集在小龙虾体内,从而增强了小龙虾的抗氧化能力、机体免疫力和抗环境中重金属污染物的能力,提高小龙虾的存活率；并且由于小龙虾生理机能的提高,进而可以促进小龙虾的生长,提升小龙虾品质；并且一田两用,小龙虾和水稻双丰收,提高收益。(The present invention provides a kind of double shrimp species cultural methods based on rice field, including prepares Se-enriched feedstuff additive, field transformation, the dispensing of parent shrimp, cray overwinter management, feedstuff feeding, the fishing of finished product cray.The present invention in cray routine mixed feed by adding the wheat and corn flour of high organic selenium content, forming food chain is gathered in plant organic selenium in cray body, the ability of heavy metal contaminants, improves the survival rate of cray in oxidation resistance, immunity of organisms and environment resistant to enhance cray；And due to the raising of cray physiological function, and then the growth of cray can be promoted, promote cray quality；And a field is dual-purpose, and cray and rice bumper harvests improve income.)

1. a kind of double shrimp species cultural methods based on rice field, it is characterised in that: the following steps are included:

(1) prepare Se-enriched feedstuff additive: by Se content be 10~15mg/kg selenium-rich corn and Se-rich wheat through being crushed into powder Agent obtains Se-enriched feedstuff additive, and wherein the additive amount of selenium-rich corn powder and Se-rich wheat powder accounts for the 2~3% and 1 of total feed respectively ~2%, make 0.3~0.75mg/kg of Se content in final feed；

(2) field is transformed: after current year rice harvesting, away from excavation shape at the ridge 1-2m of rice field on the inside of the ridge on adjacent three side in rice field At U-shaped deep water ditch, the area of the U-shaped deep water ditch accounts for the 6.5~8.5% of the rice field gross area；Positioned at the U-shaped deep water ditch Inside flattened region be plate face area, the plate face area along U-shaped deep water ditch side build have the low bank of earth between fields, the water level in the plate face area is 25-50cm；

(3) parent shrimp is launched: launching parent shrimp 12~15kg ratio in rice field per acre and launches the parent shrimp of 30~60mg/ tail in rice In the plate face area of field, the female-male proportion of the parent shrimp is 2~3:1；

(4) cray overwinter management: adding water to settle at one go, and the stable level in plate face area is kept to be not less than 25cm；

(5) feedstuff feeding: since the Waking of Insects (3rd solar term) of next year after solar term and when temperature is stablized at 12 DEG C or more continuously feed addition (1) The feed of middle Se-enriched feedstuff additive 40~60 days, the feeding volume of daily feed are the 3~5% of cray parental population weight；

(6) finished product cray is caught: starting when raising rice seedlings with fishing finished product cray the next day cage.

2. a kind of double shrimp species cultural methods based on rice field according to claim 1, it is characterised in that: the step (2) The width of middle deep water ditch is 1.5~2.0m, depth is 0.8~1.0m；A height of 20~30cm, the width of the low bank of earth between fields are 30~40cm.

3. a kind of double shrimp species cultural methods based on rice field according to claim 1, it is characterised in that: the step (2) Middle rice field plate face area is the rectangle that area is 5~10 mu, length-width ratio 2:1.

4. a kind of double shrimp species cultural methods based on rice field according to claim 1, it is characterised in that: the step (3) The put-on method of middle parent shrimp is: three times spray water in field, surrounding multiple spot puts shrimp, cray voluntarily enters water.

Technical field

The present invention relates to double shrimp aquaculture fields, and in particular to a kind of double shrimp species cultural methods based on rice field.

Background technique

Double shrimps are subordinate to section branch animal door, Crustachia, former Astacus, and meat flavour is delicious, full of nutrition, is favored by people, and is mesh The principal item of preceding shrimp culture.In recent years since the market demand sharply increases, cray natural resources are sharply reduced, price by It walks high, therefore the market demand is met by artificial scientific culture.In order to consider economic benefit, rice field collective species are used at present Cultivation scale increases sharply with area.But the generally existing individual of cray of current paddy field aquaculture output is smaller, color is poor and Disease is more, so that the survival rate of cray is affected with yield, and cannot be guaranteed that raiser obtains corresponding economic effect Benefit.[0003] in addition, in paddy field aquaculture cray mainly investment water plant and conventional cray mixed feed progress feeding, and water Contain a large amount of harmful bacteria, worm in grass, to reduce the survival rate and meat quality of cray.

Summary of the invention

Double shrimp species cultural methods based on rice field that it is an object of the invention to provide a kind of keep plant organic selenium poly- by food chain Collect in cray body, improves the survival rate of cray, promotes its growth, and promote cray quality.

The object of the present invention is achieved like this:

A kind of double shrimp species cultural methods based on rice field, comprising the following steps:

(1) prepare Se-enriched feedstuff additive: by Se content be 10~15mg/kg selenium-rich corn and Se-rich wheat through being crushed into powder Agent obtains Se-enriched feedstuff additive, and wherein the additive amount of selenium-rich corn powder and Se-rich wheat powder accounts for the 2~3% and 1 of total feed respectively ~2%, make 0.3~0.75mg/kg of Se content in final feed；

(2) field is transformed: after current year rice harvesting, forming U away from excavation at ridge 1-2m on the inside of the ridge on adjacent three side in rice field Shape deep water ditch, the area of the U-shaped deep water ditch account for the 6.5~8.5% of the rice field gross area；Positioned at the U-shaped deep water ditch Inside flattened region is plate face area, and the plate face area is built along the side of U-shaped deep water ditch the low bank of earth between fields, and the water level in the plate face area is 25-50cm；

(3) parent shrimp is launched: launching parent shrimp 12~15kg ratio in rice field per acre and launches the parent shrimp of 30~60mg/ tail in rice In the plate face area of field, the female-male proportion of the parent shrimp is 2~3:1；

(4) cray overwinter management: adding water to settle at one go, and the stable level in plate face area is kept to be not less than 25cm；

(5) feedstuff feeding: since the Waking of Insects (3rd solar term) of next year after solar term and when temperature is stablized at 12 DEG C or more continuously feed addition (1) The feed of middle Se-enriched feedstuff additive 40~60 days, the feeding volume of daily feed are the 3~5% of cray parental population weight；

(6) finished product cray is caught: starting when raising rice seedlings with fishing finished product cray the next day cage.

Further, the width of deep water ditch is 1.5~2.0m in the step (2), depth is 0.8~1.0m；The height of the low bank of earth between fields It is 30~40cm for 20~30cm, width.

Further, it is 5~10 mu of rectangle, length-width ratio 2:1 that rice field plate face area, which is area, in the step (2).

Further, the put-on method of parent shrimp is in the step (3): spray water in field, surrounding multiple spot put shrimp, cray certainly three times Row enters water.

The present invention is added to often by the corn and wheat flour for the high organic selenium content cultivated through nanometer selenium plant nutrient Se-enriched feedstuff is formed in rule mixed feed；Wherein conventional mixed feed is cray feed currently on the market, such as magnificent hundred million boards 6913, It is mainly made of protein, carbohydrate, fat, minerals and vitamins, such as fish meal, starch, soybean protein, brewer's yeast, draws Lure, vitamin form by a certain percentage.

U-shaped deep water ditch is to inhabit sky in order to which the cray that when water temperature is lower than 6 DEG C or is higher than 30 DEG C, cannot be dug a hole in time provides Between.

The put-on method of parent shrimp is to spray water in field three times, and surrounding multiple spot puts shrimp, the method that cray voluntarily enters water, concrete operations It is as follows: parent shrimp is lain in into rice field side together with frame, dips its upper layer water in field with watering can, is uniformly sprayed against shrimp frame and shrimp body, Until shrimp body surface wettability, second of sprinkling after five minutes sprays third time after ten minutes；Then along the rice field area Ban Tian surrounding The low bank of earth between fields on carry out multiple spot dispensing, every puts shrimp amount no more than 1kg, and parent shrimp is lightly laid in the hillside fields on the inside of the low bank of earth between fields On, allow cray parent voluntarily to climb into the water in plate face area, along four weekly check of the low bank of earth between fields after 30 minutes, it is impossible into the parent in water This shrimp is picked up, as commercial sized prawn processing.And the anti-cray of mesh sheet is routinely set in rice field drainage mouth and is escaped.

Se-enriched feedstuff Feeding time of the invention generally at dusk, starts to feed when light becomes darker, once a day.

So the beneficial effects of the present invention are:

1, the wheat and corn flour of the invention by adding high organic selenium content in cray routine mixed feed, forms food Chain is gathered in plant organic selenium in cray body, to enhance the oxidation resistance of cray, immunity of organisms and anti-ring The ability of heavy metal contaminants in border, improves the survival rate of cray；And due to the raising of cray physiological function, Jin Erke To promote the growth of cray, cray quality is promoted.

2, the cray that the present invention cultivates grows fast, neat specification, and does not influence the normal production of rice, and a field is dual-purpose, small dragon Shrimp and rice bumper harvests, improve income.

3, the present invention is by Se-enriched feedstuff and paddy field aquaculture method, to improve the premunition of cray, does not use antibiotic, Breeding water body environmental pollution is not caused.

4, after cray feeding Se-enriched feedstuff, selenium is contained in meat, become organic selenium-rich cray, since selenium is that human body is raw One of required microelement in life activity is the intracorporal antioxidant of people, can improve the immunity of the human body have a variety of biological function Can, and it is applied to clinical treatment for antimutagenic effect, antioxidation, the carcinogenic internal deactivation of promotion, anti-cell Proliferation function, enhancing immunity of organisms effect.To improve the edible and food therapy value of cray, it is very beneficial to human body.

5, cray overwintering period remains that rice field plate face area stable level in 25-50cm, promotes cray in plate face area four It digs a hole on the low bank of earth between fields in week, avoids it from repeatedly burrowing and consume one's strength, so that cray be promoted to grow.If water level constantly changes Or amplitude of fluctuation is larger, will lead to that cray is secondary to dig a hole again or dig dry hole upwards, it is small if be lower than original water level Lobster will also result in it is secondary dig a hole, continue to dig downwards in its original cave, dig always until the suitable environment of own.It is more Secondary dig a hole largely consumes one's strength, resistance decline, prevent cray from smoothly it is overwintering, yield can be seriously affected.

Specific embodiment

Below by specific selenium-rich cray productive experiment, the present invention will be further described.