Surface soil carbon size–density fractions altered by loblolly pine families and forest management intensity for a Spodosol in the southeastern US
作者： D. V. Sarkhot , E. J. Jokela , N. B. Comerford
DOI: 10.1007/S11104-008-9587-3
关键词: Agronomy 、 Intensity (heat transfer) 、 Botany 、 Management effects 、 Loblolly pine 、 Soil carbon 、 Fractionation 、 Environmental science 、 Cycling 、 Understory 、 Forest management
摘要: The effects of genotypic differences on soil organic carbon (SOC) cycling and their interactions with forest management systems are poorly understood. This study was undertaken to examine the family × SOC evaluate distribution across different size–density fractions in a forested Spodosol. site consisted 6-year-old loblolly pine plantation that managed under two intensities (high low level fertilization chemical understory control) included three full-sib families (fast, medium slow growers, designated priori based above ground growth). fast growing exhibited 59% higher C (p = 0.04) than 2,000 250-μm light density fraction. grower 8% aggregate 250 150-μm 0.05) heavy 0.06) fractions. Family were detected among all fraction contained most C. A modified fractionation sonication procedure proved sensitive for detecting significant as few 6 years. These results highlight potential deployment factor influencing sequestration need fully understand long-term activities pools.
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