6.1氮素在土壤中的迁移转化 6.2磷素在土壤中的迁移转化 6.3氮、磷肥料对环境的影响

2.1土壤胶体及其吸附性 2.2土壤的酸碱性 2.3土壤的氧化还原性

Greenhouse Glass the material lass transmits Glass absorbs and redirects the longer wavelengths of·nerg Remined longer-wavelength infrard ndation that greenhouse is a made of, 1)transmit \ greenhouse affect short-wavelength visible light, 2)

3.污染物的生物迁移 3.1生物积累 3.2生物富集 3.3生物放大

What is the pH of natural rain water? pH of natural rain water is determined by acidic and basic species that are

Pests and pesticides Pest: ANY UNWANTED organism that directly or indirectly interfere human activity is called a pest. Pesticides, or biocides are substances that can kill organisms that we consider to be undesirable The most widely used types of pesticides Insecticides Herbicides

General types of water pollutants Disease-causing agents(Pathogens) Oxygen-consuming agents Plant nutrients Toxic substances Heavy metals Pesticides Dissolved solids o acids

Objectives of Water Treatment The objectives for water treatment derive from two concerns Human health and welfare The health of aquatic ecosystems

Major inorganic gaseous pollutants Carbon monoxide(co) Sulfur dioxide (S02) Nitrogen Oxide(NO, NO2) NOX=NO+NO2 Ozone(03)

物理灭鼠法 化学灭鼠法 生物防治 生态防治