Effect of Different Cultivation Periods on Soil Stable Organic Carbon Pool in Citrus Orchard
Effect of different cultivation periods on soil stable organic carbon pools and fractions in citrus orchard was investigated to provide scientific basis on the study of orchard soil carbon sequestration by the temporal-spatial substitution method and physical and chemical frac-tionation method. The results showed that the citrus orchard planted in 1954 compared with the citrus orchard planted in 1980, the content of total organic carbon increased by 27.16%, organic carbon content in macro-aggregates increased by 13.59%, organic carbon content in mi-cro-aggregates increased by 80.19%, organic carbon content of heavy fraction increased by 29.25%, resistant organic carbon content in-creased by 32.00%, black carbon content increased by 4.01%. Organic carbon which combined with micro-aggregates was protected, and re-sistant organic carbon and black carbon were recalcitrant organic carbon in soil, this indicated that the stable organic carbon fractions gradu-ally enriched in soil with the increase of growing periods, which was conducive to improve carbon sink in citrus orchard soil.
国家科技期刊平台
NSTL
万方数据
维普
