生态工程学（Ecological Engineering）.doc

生态工程学（Ecological Engineering） Guidelines for ecological engineering review 1. Fill in the blanks 1, soil basic particle size: stone and gravel, sand, clay, powder 2. The types of soil degradation in China: soil erosion, soil desertification, soil salinization and soil pollution, excluding the deterioration of soil properties and non-agricultural occupation of cultivated land 3, the formation of Soil Aggregate Bond agglomeration process; including cohesion, inorganic material bonding, organic material and composite cementation and organo mineral aggregates, earthworms and other small animal interaction process 4. The common methods of soil moisture content include quality water content, volume water content, relative water content and soil water storage The 5 and five factors of soil formation are the parent material, climate, topography, time and biology, among which biology is the dominant factor 6. Soil water type can be divided into adsorption water (hygroscopic water, membrane water), capillary water and gravity water according to the force of soil moisture 7. The diversity of soil microbial nutrition types: light autotrophic type, energy autotrophic type, light energy heterotrophic type and transformation energy heterotrophic type 8. The speciation of trace elements in soil. There are water soluble, exchangeable, specific adsorption, organic, iron and manganese oxides, coated and mineral States 9. The factors that affect the availability of trace elements in soil are pH, redox potential, organic matter and soil texture 10 basic features, a good soil structure; soil structure is good, is the essence of space is good, which requires the total pore and pore size distribution, is conducive to soil water, fertilizer, gas and heat condition regulation and plant root activity 11, soil erosion types are divided into water erosion, gravity erosion, freeze-thaw erosion, wind erosion and so on 12. Types of soil water erosion: surface erosion, gully erosion, subsurface ero