Soil organic matter(SOM)and pH are not only an important part of soil fertility,but also a source of nutrients for plants and an energy source for the life activities of soil microorganisms(Huang,2000).Moreover,soil o...Soil organic matter(SOM)and pH are not only an important part of soil fertility,but also a source of nutrients for plants and an energy source for the life activities of soil microorganisms(Huang,2000).Moreover,soil organic matter(SOM)has a great impact on soil properties and can improve soil fertility and buffering performance.展开更多
自然黑土区是环境演化和气候变化的重要地质记录。研究黑土区形成的时代及古气候环境演变,清楚黑土的形成机制,对黑土资源的可持续利用、保护东北大粮仓具有重要的意义。在松嫩平原东部海伦地区典型黑土剖面中采集15件孢粉样品进行孢粉...自然黑土区是环境演化和气候变化的重要地质记录。研究黑土区形成的时代及古气候环境演变,清楚黑土的形成机制,对黑土资源的可持续利用、保护东北大粮仓具有重要的意义。在松嫩平原东部海伦地区典型黑土剖面中采集15件孢粉样品进行孢粉学研究,并对相同层位土壤样品中总有机碳进行了AMS^(14)C测年。系统的分析、鉴定和研究表明,典型黑土剖面自下而上可划分为2个孢粉组合,下部孢粉组合以Echinate Asteraceae-Artemisia-Boraginaceae-Pinus为代表,上部孢粉组合以Pinus-Amaranthaceae-Artemisia为代表。通过AMS^(14)C测年认为,松嫩平原东部海伦地区典型黑土为中全新世及晚全新世早期的产物。综合元素地球化学、古植物、孢粉分析表明,松嫩平原东部典型黑土主要形成于中全新世7400 a B.P.以来的大暖期,形成于松嫩平原温暖半湿润的气候环境,植被为以草本灌木为主的草原植被。展开更多
基金granted by Evolution and Sustainable Utilization of Land Resources in Key Belts of Global Black Land(IGCP 665)Geochemistry Investigation on Land Quality of Black Soil in Northeast China on the Scale of 1:250,000(Grant No.121201007000150076).
文摘Soil organic matter(SOM)and pH are not only an important part of soil fertility,but also a source of nutrients for plants and an energy source for the life activities of soil microorganisms(Huang,2000).Moreover,soil organic matter(SOM)has a great impact on soil properties and can improve soil fertility and buffering performance.
文摘自然黑土区是环境演化和气候变化的重要地质记录。研究黑土区形成的时代及古气候环境演变,清楚黑土的形成机制,对黑土资源的可持续利用、保护东北大粮仓具有重要的意义。在松嫩平原东部海伦地区典型黑土剖面中采集15件孢粉样品进行孢粉学研究,并对相同层位土壤样品中总有机碳进行了AMS^(14)C测年。系统的分析、鉴定和研究表明,典型黑土剖面自下而上可划分为2个孢粉组合,下部孢粉组合以Echinate Asteraceae-Artemisia-Boraginaceae-Pinus为代表,上部孢粉组合以Pinus-Amaranthaceae-Artemisia为代表。通过AMS^(14)C测年认为,松嫩平原东部海伦地区典型黑土为中全新世及晚全新世早期的产物。综合元素地球化学、古植物、孢粉分析表明,松嫩平原东部典型黑土主要形成于中全新世7400 a B.P.以来的大暖期,形成于松嫩平原温暖半湿润的气候环境,植被为以草本灌木为主的草原植被。