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广东鼎湖山自然保护区的土壤主要为山地黄壤和赤红壤。本文用差热-热重-微商热重(DTA-TG-DTG)联合热分析法,对两种土壤的粘粒矿物进行了初步研究,确认两种土壤的粘粒矿物组成主要为伊利石、高岭石、三水铝石、蛭石、针铁矿等。伊利石、三水铝石、蛭石的含量山地黄壤多于赤红壤,而高岭石则相反。两种土壤的风化程度不高,土壤矿物风化主要处于幼年阶段,山地黄壤尤其明显。另外,对不同林型下的赤红壤也进行了对比研究,其粘粒矿物组成和数量差异不大。
The soil of Dinghushan Nature Reserve in Guangdong Province is mainly composed of yellow soil and red soil. In this paper, the differential thermal-thermogravimetric-differential thermal analysis (DTA-TG-DTG) combined with thermal analysis of the two kinds of soil clay minerals preliminary study confirmed that the two clay soil minerals mainly composed of illite , Kaolinite, gibbsite, vermiculite, goethite and so on. Illite, gibbsite, vermiculite content of mountain yellow soil more than red soil, and kaolinite is the opposite. The degree of weathering of the two soils is not high, soil mineral weathering is mainly in its infancy, especially in the yellow soil of mountainous areas. In addition, the latosolic red soils under different forest types were also studied comparatively, with little difference in the composition and quantity of clay minerals.