| Summary: | 碩士 === 朝陽科技大學 === 環境工程與管理系碩士班 === 94 === Since industrial revolution, CO2 thickness and other greenhouses gas have already increased rapidly in the atmosphere. Moreover, an agreement of Kyoto (Kyoto protocol) Signing, it is obvious CO2 discharge decrement importance. Probing into the rice field-upland field rotation system of agricultural ecosystem to deal with and isolate to the organic carbon of soil with applying fertilizer in purpose of this research (sequestration) Effect. Material that choose different to apply fertilizer agricultural ecology soil of trying on etc., of treatment for seven, it is not to add any chemical fertilizer or organic fertilizer respectively that this seven kinds apply fertilizer and deal with the way, chemical nitrogen, compost, compost, supplementary 1/3 of the chemical nitrogen, compost, supplementary 2/3 of the chemical nitrogen, supplementary 1/3 of the chemical nitrogen of green manure, peat, supplementary 1/3 of the chemical nitrogen,etc., experiment there is method it is first it utilize not subsiding law obtaining Stoke'' s law <have the organic in soil 2 μm - inorganic not colloidal to suspend liquid of, this suspends the liquid utilizes the analysis instrument of laser foot-paths of high performance to determine all kinds of mode of foot-path and is distributed first, and then carry on the suspending left liquid the freeze drying, in order to get rid of the moisture content, get soil particle grains of foot-path <the topsoil and soil of 2 μm glue one, then grind, it grind time divide into it order five period of time, last liquid separately by 0.45 μm soil that finish grinding and 0.22 Straining the membrane to filter of μm, filtrate and carry on analysing directly and total organic carbon analysis respectively, and filter well strain membrane carry on freeze drying is it strain soil of membrane glue one to obtain, carry on Fu set up leaf change spectrum analysis instrument of infrared ray act as qualitative analysis, then choose and has not got rid of the not grinding and grinding 80 min sample, getting rid of the not grinding and grinding 80 min sample of CaCO3-C of CaCO3-C, carry on the field and launch the scanning type electron microscope to observe and take pictures, shine the energy scattering spectrocomparator of the X-rays finally, make determining the nature and quantitative analysis of further trace element to the soil.
The result of study finds, analyses the respect in a foot-path mode, grind time long, its foot-path is not known reduce obviously, reason this can launch by field person who scan photo of electron microscope learn, because research this sample flaky clay mineral, so if mortar grind to what, level of part when grinding, no matter how long does it grind, grains of foot-path can obviously reduce. Analysing the respect in the total organic carbon, its thickness is among 75.6-28.0 mg L-1, the content of long total organic carbon has increase trends to grind time, and the smaller a foot-path is, total organic carbon content high, reason its is it grind time long, grains of foot-path little to infer, so soil colloid particle increase than surface area, absorb strength follow to increase, can absorb more organic carbons. In spectral analysis of infrared ray, it is main in its lie in it is last 1,074 cm-1 office at wave difference, grind 40 of and 80 min has stronger absorption to take, in order to grind 80 min to be difference most heavy, but has not been grinding among them(0 min) , in grinding 10 min and grinding 20 min, present weaker absorption to take, combine with inorganic mineral in the material of the having machine here. In launching the scanning type electron microscope photo in the playground, it is range upon range of flaky clay and mineral that the soil glues one; Particle on the surface know for the organic carbon of the soil tentatively; The thickness of flaky clay and mineral is endured the rice grade (under 100 nm) Standard, know research this experiment soil method get glue grain endure rice grade very; With getting rid of CaCO3-C to compare, can observe more flaky clay and mineral and have few range upon range of phenomena after getting rid of CaCO3-C, this can make range upon range of slices separated after demonstrating CaCO3-C is got rid of. Analysing the respect in the energy scattering spectrocomparator of the X-rays, the elements included have C (CaCO3) , O (SiO2) , Mg (MgO) , Al (Al2O3) , Si (SiO2) , K (MAD-10 Feldspar) , Fe (Fe) Wait for seven kinds of elements, get rid of CaCO3-C part Cl more (KCl) Element, its reason should be getting rid of CaCO3-C and using 0.1 M HCl to cause; C element easy to influence and contain inorganic carbon of soil carbon sticky tape or carbon glue among them, so, after comparing with getting rid of CaCO3-C, the C element that getting rid of CaCO3-C analyses, can know for the real organic carbon of soil further.
|
|---|
