Farming Crabs In Rice Field !
Daily management
(1) Water quality control:
Apply quicklime 5 kg/mu each time the crab hulls, and sprinkle activated photosynthetic bacteria 0.6~0.8 kg/mu after 48 hours; Deepen the water layer as much as the rice allows.
(2) Feeding of bait:
the temporary breeding tank is spread and the crab seedlings are fed to the high-quality full-price feed, mainly small fish and shrimp in early July; From mid-July to August, we feed mainly green feed, small fish, shrimp, snails and mussels. After mid-August, it was changed to high-protein concentrate feed, and it was combined with new corn and new sorghum.
(3) Fertilizing crab paddy fields with 100 kg of organic fertilizer before rotating tillage; Slow green fertilizer and topdressing should be applied less frequently, and the amount of fertilizer applied each time should not exceed 3 kg/mu.
(4) Disease control crab before stocking with quick lime (70 kg/mu) with 10 cm of water disinfection, in order to supplement calcium for the purpose of field with 20 kg of quick lime per mu. Disinfect crabs with 3% salt water or potassium permanganate solution in a medicinal bath before putting them in the tank.
(5) Monitor water ammonia nitrogen value, dissolved oxygen content, ph value and nitrite on time at each stage of culture, and take measures such as water change to adjust the value range suitable for rice growth and river crab growth and dehulling !
