典型黑土中有机质和养分元素的变化分析

依据2003-2008年松辽平原中南部地区多目标区域地球化学调查成果，选择黑土类型土壤样本6553件，研究典型黑土中有机质及养分元素碳、氮、硫、磷、钙、钾、铁、镁、锌、铜、钼、锰、硼的变化特征.发现典型黑土中有机质结构性元素碳、氮、硫、磷以及铜、镁、铁、钙元素的含量变化与有机质的变化具有正相关性.养分元素含量的变化与成土母质和土壤类型关系密切，如锰在黑土中含量普遍偏高.中国土壤以及松辽平原土壤的宏观背景是典型黑土中钾偏高和钼、硼偏低.生物气候带是影响有机质和某些养分元素变化的重要因素.温带-寒温带的气候条件影响着土壤的物理性质和化学性质，如粒级、黏粒性、酸碱性，进而影响元素含量的变化.

VARIATION CHARACTERISTICS OF ORGANIC MATTERS AND NUTRIENT ELEMENTS IN TYPICAL BLACK SOIL

Based on the results of multi-objective regional geochemical survey in central and southern Songliao Plain during 2003-2008, 6553 soil samples are selected to study the variation characteristics of organic matters and nutrient elements including C, N, S, P, Ca, K, Fe, Mg, Zn, Cu, Mo, Mn and B in typical black soil. It is found that the content variation of structural elements such as C, N, S and P, as well as other elements including Cu, Mg, Fe and Ca, has positive correlation with that of organic matters in typical black soil. The content change of nutrient elements is closely related to parent materials and soil types. For instance, Mn content is generally high in black soil. The macro-background of soil in China and Songliao Plain is characterized by high K and low Mo and B in typical black soil. Bioclimatic zone is an important factor affecting the variation of organic matters and some nutrient elements. The climatic conditions of temperate-cold temperate zones affect the physical-chemical properties of soil such as grain size, clay fraction acid-base property of soil and then the change of element content.