In summer, due to the shallow water layer in the paddy fields, the high water temperature, and the rapid increase in fish excrement, the water is easily contaminated and causes oxygen deprivation. A slight negligence will result in the death of large numbers of fish, causing losses to the rice paddies. In order to ensure the safety of paddy fish farming in summer, we must do a good job in the following five measures.
One, often dredge fish ditch, fish slip
In summer, due to increased fish consumption, excessive bait and excrement, and fish activity, fish ditch and fish slip easily blocked, causing the ditch and slippery water level to decrease, affecting the fish. Growth and development. To this end, in the summer should be cleared once every 3 to 4 days, to ensure that fish ditch width 4O cm, depth 30 PCT, meters, fish slip deep 60 to 80 cm, and make the ditch to communicate, ditch slip the same.
Second, keep the rice paddy fish water level
The depth of the water level in paddy fields is directly related to the speed of fish growth. If the water level is too shallow, it can easily cause a sudden change in water temperature; it can lead to a large number of fish deaths. Therefore, the water level in rice paddies is 10 cm higher than that of normal paddy fields, and new water is poured every 2 to 3 days to ensure the fresh and cool water quality.
Third, do "four fixed" feeding
Qualitatively, the fodder must be tender, the concentrate must be free from mildew, and the manure must be fermented. For the second quantity, it is better to control the amount of bait on the day of the meal. In three timings, it is advisable to feed at 6 to 7 in the morning and 5 to 6 in the afternoon and do not feed at noon. Four positioning, feeding position to choose to fish within the trap is appropriate, because the fish in the deep water level, convenient for fish to concentrate on feeding, but also for the removal of residual baits and fish excrement provides convenience.
Fourth, take a good shelter
In summer, in order to prevent the water temperature from being too high and affecting the normal growth of fish, in addition to maintaining a certain level of water in the paddy field, it is best to use a straw shed to shade the fish above the fish trap; at the same time, you can also stock aquatic plants such as duckweed in the fish slide. It can be used as a bait for fish, and it can also play a role in sheltering from the shadow.
Fifth, rational fertilization
In summer, if paddy fields really need fertilization, they should adhere to the principle of applying organic fertilizers, with as little or no inorganic fertilizer as possible, and do so in small quantities. Before fertilization, the water in the paddy field should be drained into the fish ditch and fish slip, allowing the fish to enter freely and fertilize. Per-mu paddy field applies manure 600-800 kilograms each time, urea 5 kilograms, superphosphate 20 kilograms. When fertilizing, do not apply chemical fertilizer directly into fish ditch or fish slip, otherwise it will cause fish poisoning.
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