Fishing day: long shell in summer, long meat in autumn. The cool autumn season is the peak season for fish growth, and it is also a critical period for the production of aquaculture mats. To achieve high yields and efficiency, we must take measures to ensure the following four levels:
One, put a good feeding and fertilizer off. Normally, the fertilization and feeding amount should be about 40% of the total fertilization and feeding amount in the whole year from August to November. How much and how good the food is fed will directly affect the annual output and economic efficiency. Since the beginning of July this year, there have been many changes in the weather since the rain, and the humidity in the air is also high. In addition, if the ventilation conditions during storage are poor, the feed can easily become moldy and degenerate. , The warehouse should be well ventilated to prevent feed from mildew and ensure food quality. Feeding the feed at the same time depends on the weather. If the weather is bad and the water temperature changes greatly, the amount of feed should be reduced. Feeding the feed must be done “four settings†(quality, quantity, positioning, timing).
Application of organic fertilizer, should be a small number of times, so as to avoid overflood caused by pond fish floating head; application of inorganic fertilizer, the use of carbon ammonia per acre 5-7.5 kg, or 2.5-3.5 kg of urea. After the “white dewâ€, the resources of herbivorous fish gradually decreased. At this time, concentrate feed should be mainly used.
Second, turn off the management of good water quality. After the fall, the temperature dropped, the amount of bait in the fish ponds was relatively increased, the fish grew fast, the food intake increased significantly, the excretions also increased, and the water quality was prone to deteriorating due to lack of oxygen. Therefore, it is necessary to constantly change the water in order to keep the fish pond water fresh, fat and not dirty. The use of beneficial microbial preparations to improve the bottom quality and water quality is encouraged. During high temperatures, it is best to apply photosynthetic bacteria or EM bacteria and other microbial agents once every 15 days.
Third, to prevent fish floating head off. For individual intensive fish ponds. Due to the large amount of fertilizer applied in the feeding, the content of organic matter in the water is high, and the oxygen consumption factor is also increased, so the phenomenon of anoxic floating head is prone to occur. Therefore, adhere to the morning and evening patrol ponds, aerobic machine aerobics should be opened every day. The use time of aerators is related to the weather conditions. Generally, they are opened in sunny afternoons and open in the early morning on cloudy days. Rainy seasons or water and fertilizers usually open before and after midnight. In case of hot weather, it is necessary to extend the time for starting oxygen.
Fourth, the prevention and control of good fish disease. "White Dew" before and after. Enter the season of fish disease, do not carelessness, to prevent active treatment. From September to November, every 15 to 20 days, fish ponds with a depth of 1 meter per acre need to be sprayed with quick lime 15–20 kilograms all at once, and 300 grams of bleaching powder can also be used to disinfect the fish ponds or use 0.3. ~0.5ppm concentration of strong chlorine fine Quanchiposa once disinfected once, at the same time with a pest control for a parasite to prevent high yields.
Cas 143782-23-4,Enzalutamide Intermediates,6-Bromo-2-Chloro-8-Cyclopentyl
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