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First, straw pulp raw materials. Select aquatic plants such as water peanuts, water hyacinths, and water lettuces to reproduce quickly and produce high yields. Among them, the output of water peanuts can reach 225 to 300 tons per hectare, and the water lettuce and water hyacinth can be as high as 750 tons per hectare. Therefore, these plants are generally used as raw materials for straw pulp. Second, the production method. Using a high-speed beater (4,500 to 5,000 revolutions per minute), the raw materials were put into the pulper and water was added (water was 40% of the weight of the grass), and the fine particles were formed into a slurry. Then add the salt (the salt accounts for 0.2% of the weight of grass pulp) into the beaten pulp. Water peanuts contain a toxic ingredient called "saponin", so the fish can not directly eat water because this is the reason. After adding a small amount of salt, the content of saponin in the straw can be reduced from 3.8% to 1.8%, and the fish can be fed. Third, the use of fish straw. Grass pulp mesophyll cells are suspended in water and gradually sink after a few hours. In order to increase the utilization rate of straw, the feeding method of straw pulp should adopt the “few times full, full-sprayed†feeding method. Grass pulp is a direct feed and an indirect feed. Its mesophyll cells can be eaten directly by cockroaches and catfish. The nutrients dissolved in pulp juice can also cultivate plankton in water and indirectly become feed for fish use. Fourth, the amount of investment. Fish seedlings can use 100-130 kilograms of straw per acre as base fertilizer; after fry under pond, the average amount of 50-100 kilograms per mu per day or 7.5-10 kilograms per 10,000 fish fry, and every 2-3 days, 1 vote Times, feeding about 15 days, you can begin to pull the net exercise, after 2-3 times the net, that is, develop summer fish species out of the pond.