First, the sun Tianguan. Before the drying of the field, fish gutters should be dredged to ensure that the gully is open. When watering in the field, the water speed is slow, so that the fish have enough time to swim into the fish ditch. During the drying season, the depth of fish ditch and gill should be kept between 15-20 cm and 80-100 cm, respectively. Pay attention to the fish at any time. When you find that the fish is floating, you should immediately pour fresh water into the fish ditch. Promptly return water after drying.
Second, drug application off. Fish farming rice fields to control rice pests and diseases should use high efficiency, low toxicity, low residual pesticides. For example, trichlorfon, dimethoate, marathon, leaf glycosides, aldicarb, acephate, diterpenoid, leaf blight, and Jinggangmycin are relatively low in toxicity to fish. Fish toxin, toxaphene, sodium pentachlorophenol, pyrethrum and other pesticides are more toxic to fish and are strictly prohibited. Before application, drain the water from the field, drive the fish into the fish ditch, close the inlet, block the field, and then fight the medicine. When applying pesticides, it is best to divide the paddy fields into several pieces and apply pesticides in order to make the fish avoidable. The spray should be sprayed or sprayed, and should not be sprinkled or splashed, and the dosage should be strictly controlled. When spraying, the fog should be finely divided and sprayed on rice leaves as much as possible to reduce the drug falling into the water. The dusting should be carried out on a sunny, windless, dew-filled morning, so that pesticides adhere to rice leaves. If fish is found to be unbalanced or in a coma due to phytotoxicity, new water should be replaced immediately.
Third, catch fertilizer off. In the cultivation of fish and rice, the human feces must be matured through stacking. Each time the amount of fertilizer per acre does not exceed 150 kg, a small amount of chemical fertilizer should be used in small quantities. The safe dosage per acre is 7.5-10 kg of urea and 12.5 g of ammonium sulfate. Kg, potassium chloride 5-7.5 kg, superphosphate 5-10 kg. Ammonium bicarbonate has a large lethal effect on fish and is not suitable for top dressing. The paddy field depth should be kept at 15 cm or more when dressing.
HEBEI PINGLE FLOUR MACHINERY GROUP CO., LTD , https://www.plrollermill.com