The suitable autumn water temperature is the peak season for the growth of fingerlings. It is very important to manage the fish species in autumn. It can promote growth, enhance physical fitness, increase the ability to resist disease and cold, ensure the safety of winter fish species, and provide large-scale and physical fitness for the next spring. Robust and excellent fish stocks are stocked, so as to increase fishermen's income. Therefore, based on years of farming experience, the author proposes four points on how to grasp the management of fish species in autumn:
Turn pool clear pond to optimize the environment
Fish species in the pond after the summer and autumn high temperature breeding period, the pool sediment will produce a large number of harmful material deposition, the pool acidity is high, after the end of autumn, the fish should be transferred to ponds sterilized through clear ponds to cultivate, so that the species safe winter . For the original pond, use 75 to 100 kg of lime per acre. After the disappearance of the drug, the water will be fertilized according to conventional methods. After 5 days to 7 days, the fish will be returned to the original pond.
Carefully filter size classification
In combination with the conversion of the fish species, the fish species will be sized and sorted, and the fish species of the same species in the same pool should be the same. Large-sized fingerlings have large food intake and strong grabbing power. If small-sized fingerlings are placed at the same time, the small-sized fingerlings will not receive enough feed and eat unevenly, resulting in a decrease in physical fitness. More than one or more than two species of fish can be put into a fish pond culture. Specially small fish species, special pool cultivation, enhanced feeding, rapid rejuvenation.
The reasonable density depends on the water and it is determined that raising the survival rate of the fingerlings in winter should be based on the size of the water surface, the depth of the water body, and other reasonable conditions for stocking density. 1.5 meters deep pond, acres of 7 cm to 8 cm long fish species 4500 to 6000 tail. The depth of 1.5 meters to 2.5 meters in the pond, and the water surface is wide, acre put 6,000 to 10000 tail.
Strengthen management science feeding
In order to raise grass carp, fish ponds with oysters and clams should be mainly cast green feed and be fed with concentrates. Every day, ten thousand grass carps are fed with duckweed or aquatic plants ranging from 70 kg to 90 kg and concentrate feed 1.5 kg to 2.5 kg. First, cast green fodder and then concentrate to prevent grass carp from competing with other fish. The ponds of polyculture and puffer fish must also be fertilized regularly, fertilize once every 10 days to 15 days, and ferment 100 kg to 150 kg of manure per mu. The water transparency of the pool is maintained at 30 cm to 35 cm. Fish ponds that use grass carp as the dominant species of carp and carp should be dominated by fertilization, supplemented by feeding. In addition to the use of basal fertilization, fertilizer is applied once every 10 days or so, and between 80 and 100 kilograms of human feces are consumed per mu. At the same time, 2 kg to 4 kilograms of feed per 10,000 fish are consumed each day. For grass carp, 60 kg to 90 kg of fodder per 10,000 grass carp before consubstantial feed is appropriate.
At the same time, we must adhere to the morning, evening and evening patrols and find that the situation is resolved in a timely manner. The food field should be regularly cleaned and disinfected. Residues of leftover baits should be removed in a timely manner. Each half of the month should be sprinkled or hung with bleaching powder of 0.5 kg to 1 kg of water around the food court. Feed the bait, preferably 2 times a month, for 3 days each time, to ensure that the fish species are robust.
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