《水产养殖水质调控》PPT课件.ppt
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1、水产养殖水质调控 1.6 Water quality control of aquaculture,1.6.1 Main factors affecting water qualityChemistry: 工业,农业,人为活动Biology: D.O,PH,1.6.2Methos of water quality control养殖水体水质调控方法1.6.2.1Chemical controlUse chemicals to control PH and toxic (有毒)gas.,1.6.2.2 Physical control 1.Improve bottom layer quality
2、改善底质 2.Water resource treatment水源处理 3.Water exchange or refill更换或补充新水,1.6.2.3 Biological control生物控制1、Increse useful zoonplankton through artificial culture.2、Microecologics微生态制剂3、Photosynthetic bacteria光合细菌4、Higher aquatic plants水生植物,1.6.3 Biological control of water quality养殖水体水质生物调控措施1.6.3.1 Obse
3、rcation of color and transparency水色和透明度观察“看水” The fisherman observe the pond water mainly about渔民看水主要依据 1. water color (water expression)水色(水华),(1)The relationship between water color and plant plankton (Table1-1),(2)Water color (water expression) in rich water肥水“水华”类型,The phenomenon that the water
4、shows evident color owing to the mass propagation of plant plankton is call water expression. It can be divided into the follow types according to its apperance (Table1-2):,(3)Judge the water quality by its color and expression (Table1-3)根据水色、水华类型判断水质,2. transparency透明度 (1)Water transparency and the
5、 phytoplankton透明度与浮游植物的关系(2)Water transparency and the water fertility透明度与水体肥度(Table1-4),3. Observation of water nutrition水体肥瘦与水质判别Iii Water fertility and the water quality: fertilized, circulating, fresh, cleanThe meaing of fertilized, circulating, fresh and clean in biology肥、活、嫩、爽,The good water i
6、n fishermans eye is high summarize as the four words. This is much more comprehensive than only judge the water by its color.However, there actually has an concept of biological meaning of the four words. Its quite essential to make this clear by test the species and quantity of the plant plankton.(
7、1)Fertility. The concept of fertile water is not unified now. some according to the nutritive saltsand and dissolved organic matter quantity, some according to the amount of plankton.But in a fishermans eye, the sign of fertile water is the rich color of it, which means the quantity of plant plankto
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