水产养殖水质调控 1.6 Water quality control of aquaculture1.6.1 Main factors affecting water quality v Chemistry: 工业，农业，人为活动 v Biology: D.O，PH1.6.2Methos of water quality control 养殖水体水质调控方法 1.6.2.1Chemical control v Use chemicals to control PH and toxic (有毒 ）gas.1.6.2.2 Physical control 1.Improve bottom layer quality v改善底质 2.Water resource treatment v水源处理 3.Water exchange or refill v更换或补充新水1.6.2.3 Biological control生物控制 v 1、Increse useful zoonplankton through artificial culture. v 2、Microecologics微生态制剂 v
