A mu is about 20,000 yuan, is the best profit margin.

Farming technology: I. Pre-preparation.

January-February, digging a "one" or "L"-shaped field side ditch, ditch depth 0.6 to 0.8 meters, 4 meters wide, slope ratio 1:1.5. After the completion of the earthworks, the big field in the water soak the field! 1 month to eliminate the harm of drug residues. After drainage, apply 160 kg/mu of quicklime to clear the pond, put 200 kg/mu of bio-culture medium a week later, and plant water plants & #40; Ileaginous algae & #41; at the same time. Water plants every 2 to 3 meters planted a cluster, covering about 60% of the total area of the field. In order to promote the growth of water plants, can be applied to the fermented farmyard manure or splash bacterial fertilizer, in the crayfish fry stocked with high temperature Vc or Jinnanong vermicompost Vibrio in order to reduce stress and improve the survival rate of seedling stocking.

Two, seedling placement.

March - mid-April, put shrimp seedlings 5000 to 7000 tails / mu, specifications for 140 to 300 tails / kg. Young shrimp color greenish brown or tender red, strong vitality. Seedlings stocked with river water before drenching shrimp seedlings 2 to 3 times after the multi-point put into the paddy field of the side slope of the shallow area, so that the shrimp seedlings climbed into the field on their own, the vitality is not strong or close to the death of the shrimp seedlings should be fished out in a timely manner, to prevent the water quality from being contaminated by the dead shrimp.

Three, daily management

Late April to the end of May, the water temperature rises, should strengthen the water quality control, conservation of aquatic plants, feed feeding and disease control. Crayfish miscellaneous diet, can be fed plant or animal bait, small mixed fish should be chopped and fed. Pre-culture feeding for 1% to 2% of body weight, feeding after mid-May for 3%. Feed 30% of the total amount of feed for the whole day from 8:00-9:00 a.m. and 70% of the total amount of feed for the whole day from 5:00 p.m. to 8:00 p.m. in the evening.

Four, timely fishing

Early June to mid-June, April-June general paddy water temperature of 12 ~ 25 ℃, is the most suitable for crayfish growth of the water temperature, in this water temperature conditions 1 cm shrimp seedling after 3 months of growth weight up to 25 ~ 40 grams / tail or more, large-size shrimp seedling & # 40;120 ~ 140 tails / kg & # 41; after 45 days of growth, the weight is generally up to 50 ~ 70 g / tail. Therefore, in mid-June before rice-planting to successively catch and sell 70% to 80% of the adult shrimp, at this time should be as high as possible to improve the rate of return, not catching all the crayfish stay in the ditch for mating and breeding.

Five, shrimp rice **** crop period

In mid- and late June, the paddy field after drying fertilizer, rotary tillage, leveling. One week before transplanting seedlings, per mu of high-quality commercial bio-organic fertilizer 200 to 500 kg, fertilizer after rotary plowing of paddy fields, the residual water plants and fertilizer spinning into the topsoil as a rice fertilizer, and in the paddy fields every interval of 5 meters to open a 20 cm wide, 7 to 10 cm deep small sink for shrimp seedlings to inhabit in the baked field, if the density of shrimp seedlings in the paddy field is low, the project can be canceled to dig a sink. Rice seedlings planting density of general row spacing of 22 to 25 cm, plant spacing of 18 cm, rice planting density of 13,000 holes / mu, transplanted to do shallow water and diligent irrigation. ****crop shrimp seedlings should be about 10 days after the return of seedlings can be placed, shrimp seedlings and rice ****birth stocking density of 1500 ~ 2000 tails / mu is appropriate.

Sixth, do a good job of daily management, timely fishing finished shrimp.

Early July - mid-August, with bio-pesticides to control rice pests and diseases. Should be preferred low-toxicity, low-residue biopesticides such as Wellbutrin, Goodrich and Kangkuan, etc., thiazinone and other inhibitory effect on crayfish molt should be used with caution. After stocking crayfish, the number of weeds in the paddy field is significantly reduced, usually do not need to weed, but herbicide drugs such as grass pouncing on the crayfish, such as extremely low toxicity, rice shrimp **** can be a small amount of use, but this drug degradation is slow, long-lasting efficacy, a large number of use is not conducive to the late planting of aquatic grasses and growth. Crayfish are highly sensitive to organophosphorus or pyrethroid insecticides are prohibited in the breeding process. Under normal circumstances, no longer feeding artificial feed, and timely capture of adult shrimp for sale.

For reference only, please forgive any inaccuracies

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