Crayfish, also known as crayfish, belonging to the Crustacea, Decapoda, Reptilia, crayfish, crayfish genus, native to North America. Nowadays, rice shrimp integrated farming as the main mode of culture of crayfish has accounted for its breeding area of 70%. However, in this mode there is also a widespread phenomenon of irregular feeding of crayfish, irrational feeding not only leads to feed waste, reducing the production efficiency, but also damage the water environment, which leads to disease.

One, feeding habits

The crayfish is an omnivore, the wild state of large aquatic plants, algae, debris, zooplankton, rotifers, aquatic insects will be ingested. Although the crayfish year-round feeding, but different seasons of the species feeding varies greatly, generally spring, summer, fall feeding intensity is high, winter feeding intensity is low. During the day, the crayfish's feeding is mainly concentrated in the morning and evening.

Second, the amount of daily feeding

The amount of daily feeding of crayfish in order to eat, eat, do not leave residual bait as a principle, according to the weather, water quality, density, and crayfish in different stages of growth and physiological period of time to be adjusted. Generally for fresh feed, young shrimp feeding amount of 8% to 10%, adult shrimp feeding amount of 6% to 8%; for the feed, young shrimp feeding amount of 4% to 6%, adult shrimp feeding amount of 3% to 5%. Shrimp concentrated moulting before to reduce feeding, concentrated moulting after to increase feeding.

Three, feeding mode

1, rice shrimp rotation

Species of rice and shrimp farming alternate years model for rice shrimp rotation. The model in April-May each year for the seedling period, generally more basal fertilizer, timely fertilizer cultivation of rotifers, copepods and other zooplankton and aquatic insect larvae at this time can be fed less feed. 6-August for the growth period, the shrimp body length increase, vigorous growth, to feed the full feed. 9-October weight gain period, this time For the shrimp fattening stage, feed feeding to high protein feed and animal bait, the stage can catch adult shrimp. November - the following year in March for the overwintering period, when the temperature drops shrimp feeding reduction, the general water temperature is lower than 10 ℃ shrimp stop feeding.

2, rice shrimp **** (continuous)

In China, the main crayfish producing areas are mainly concentrated in the Yangtze River Basin, the region generally produce only one season of rice a year. Combined with the characteristics of the region's rice cultivation generally in the rice harvest 1 ~ 2 months before or after the harvest in the paddy ring ditch stocking shrimp or shrimp with eggs, the following year 4-5 months from the capture of shrimp, 8-9 months from the capture of shrimp, at this time, you can leave some of the adult shrimp as shrimp to carry out the next round of shrimp and rice **** work.

Four, feeding methods

Feeding methods to follow the "timing, quantity, quality, location" of the "four" principle. Can be fed twice a day in the morning and evening at regular intervals, feeding were 20% and 80% of the daily feeding. Crayfish with feed must choose a balanced nutrition, good enticing and stable quality feed, fresh feed must ensure that the fresh does not deteriorate. Because the crayfish activity is weak, so the feed should be along the beach near the ring ditch and the ditch side of the Tian Ban evenly spread, the ring ditch do not have to feed.