论文部分内容阅读
1、生石灰(外用药) 性状:白色立方晶体或粉末,露在空气中渐渐吸收二氧化碳而成碳酸钙,易溶于酸,难溶于水,但能与水合成氢氧化钙。在水产养殖上生石灰为良好的清塘药物,熟石灰效果颇差。使用方法: 防治鱼类白头白嘴病,赤皮病、烂鳃病、肠炎等病时,每亩水深1米左右,施放生石灰15～25公斤。在鱼虾放养前,以375ppm生石灰清除池塘内的敌害和杂藻类,,或排干塘水,按每亩10～20公斤,用生石灰全池撤放。生石灰易熟化,熟化后效果很差,应及时使用。
1, Lime (external use) traits: white cubic crystal or powder, exposed to the air gradually absorb carbon dioxide into calcium carbonate, soluble in acid, insoluble in water, but with water to form calcium hydroxide. Lime on aquaculture as a good clear pond medicine, slaked lime effect is poor. Usage: Prevention and treatment of fish white head and mouth disease, red-skin disease, rotten gill disease, enteritis and other diseases, the water depth of about 1 m per mu, release of lime 15 to 25 kg. In the stocking of fish and shrimp before, to 375ppm quicklime to clear the enemy’s harmful algae and algae in the pond, or to drain the pond water, according to 10 ~ 20 kilograms per acre, with full lime withdrawal. Lime easy to cure, aging effect is poor, should be promptly used.