本文選題：長期施肥　切入點：粘粒礦物　出處：《吉林農(nóng)業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本研究是以吉林農(nóng)業(yè)大學(xué)長期定位試驗的土壤為研究對象,通過X-射線衍射分析和化學(xué)分析對長期施肥土壤的粘粒礦物組成、土壤礦物全量及其與土壤酸度的關(guān)系進行研究,結(jié)果表明:(1)長期施肥土壤的粘粒礦物組成類型主要有:伊利石、伊蒙混層礦物、高嶺石以及少量的蒙脫石、綠泥石和蛭石;粘粒礦物主要以伊利石和伊蒙混層礦物為主,二者含量和的平均值為87.5%,與未施肥土壤相比增加了1.6%。此外,長期施肥可使土壤粘粒中高嶺石和伊利石的含量減少,而綠泥石、蛭石、伊蒙混層礦物的含量增加。不同施肥處理下,粘粒的礦物含量有所不同;其中,除單施N肥、N/P配施之外,其它施肥處理下的蒙脫石含量均有不同程度的增加。(2)長期施肥土壤粘粒的礦質(zhì)全量組成以SiO2、Al2O3和Fe2O3為主,三者含量和的平均值為75%,與未施肥的土壤相比增加了2.3%。長期施肥可使土壤粘粒的TiO2含量降低,而其它組分的含量會有不同程度的增加。不同施肥處理下,化學(xué)組分含量的變化有所不同;其中,N/K和N/P配施可使SiO2含量降低,單施N肥和N/P/K配施可使Al2O3含量降低,單施P肥、P/K和N/P/K配施可使CaO含量降低;N/P配施可使TiO2含量升高,單施K肥和N肥可使P2O5含量降低。(3)長期施肥土壤的粘粒礦物組成與土壤的pH、交換性酸、交換性H+、陽離子交換量等具有一定的相關(guān)性。其中,長期施肥土壤的pH和陽離子交換量的降低,促進了礦質(zhì)全量中Fe2O3含量的增加;長期施肥土壤的pH、交換性H+和陽離子交換量的降低,促進了高嶺石含量的增加;土壤的pH、陽離子交換量的降低,阻礙了綠泥石含量的增加。綜上可知,長期施肥土壤粘粒礦物的種類沒有變化,但不同種類粘粒礦物在含量上具有一定的差異性,說明長期施肥土壤的粘粒礦物組成和礦質(zhì)全量與土壤酸度變化具有一定的聯(lián)系。
[Abstract]:In this study, the clay mineral composition, the total amount of soil minerals and the relationship between soil acidity and clay mineral composition of long-term fertilized soil were studied by means of X- ray diffraction and chemical analysis, taking the soil of Jilin Agricultural University as the research object. The results showed that the clay minerals in the soil were mainly composed of Illite, Illite, immondite, kaolinite and a small amount of montmorillonite, chlorite and vermiculite, and the clay minerals were mainly Illite and Illite. In addition, long-term fertilization can reduce the content of kaolinite and Illite in clay, while chlorite, vermiculite, and vermiculite. The mineral content of the mixed layer of eummonium is increased. The mineral content of clay is different under different fertilization treatments. The content of montmorillonite increased in different degree under other fertilization treatments. (2) the total mineral composition of soil clay under long-term fertilization was mainly Sio _ 2 Al _ 2O _ 3 and Fe2O3. The average value of the sum of the three components is 75, which is 2.3% higher than that of the unfertilized soil. Long-term fertilization can decrease the TiO2 content of soil clay, while the other components will increase in varying degrees. The change of chemical component content is different, in which N / K and N / P combined application can decrease SiO2 content, N fertilizer and N / P / K combined application can decrease Al2O3 content, and P / K and N / P / K combined application can decrease CaO content and increase TiO2 content. Single application of K and N can reduce P _ 2O _ 5 content.) the clay mineral composition of long-term fertilization soil has certain correlation with soil pH, exchangeable acid, exchangeable H, cation exchange capacity and so on. The decrease of pH and cation exchange capacity in long-term fertilized soil promoted the increase of Fe2O3 content in total mineral content, and the decrease of pH, exchangeable H and cation exchange capacity in long-term fertilized soil promoted the increase of kaolinite content. The decrease of soil pH and cation exchange capacity hindered the increase of chlorite content. The results showed that the clay mineral composition and total mineral content of long-term fertilized soil were related to the change of soil acidity.
【學(xué)位授予單位】：吉林農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：S158

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相關(guān)期刊論文 前1條

1 孫慶峰;陳發(fā)虎;Christophe Colin;張家武;;粘土礦物在氣候環(huán)境變化研究中的應(yīng)用進展[J];礦物學(xué)報;2011年01期

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本文編號：1584501