(1) put 30 kg of new pond wood and no more than 20 kg of old pond wood. ?

(2) xintang put 10 kg per mu for the first time, and put 20 kg in two days. After the seeds are put in, the whole pond will be sprinkled with "silver roses". After 20 days, put about 20 kg (this can put 4 ~ 5 batches of seedlings every year, and put 80 kg ~ 120 kg of seedlings * * *).

(3) Try fishing after 30 days of culture, and continue fishing after 45 days. To catch 100 kg adult shrimp, it is necessary to add about 25 kg shrimp fry.

The characteristics of crayfish culture are soil quality, water quality and size.

(1) Soil quality: it can't be pure sand, and sand is not suitable for species protection; Hard soil is also not suitable for seedling proliferation.

(2) Water source: Where the water source is not good, directly drill wells to pump water. ?

(3) Size: the size of the hall entrance should be easy to manage (the hall entrance is too big to manage, and the management cost is too high if the hall entrance is too small). General pond 10 ~ 20 mu, paddy field 30 ~ 50 mu.