不同垦殖方式下茶园土壤有机碳的流失特征研究

Losses of Soil Organic Carbon in Tea Plantations under Varied Reclamation Methods

摘要: 采用径流小区观测法研究不同茶园垦殖方式对土壤有机碳流失的影响。结果表明，不同垦殖方式下茶园土壤有机碳流失均以泥沙态损失为主，占流失总量的87.4%～98.6%，而径流态损失仅占1.4%～12.6%。就土壤有机碳年流失量而言，梯台植草方式下土壤有机碳流失量最小，分别比顺坡清耕、顺坡植草和梯台清耕方式降低70.1%～70.7%、42.1%～57.0%和14.2%～17.8%，说明梯台植草方式可作为减少茶园土壤有机碳流失的技术途径。

Abstract: Effect of erosion on the loss of organic carbon in the soil of tea plantations was studied on runoff plots under different methods of reclamation. It was found that the sediment-bonded organic carbon constituted the major form of the loss, accounting for 87.4%, and up to 98.6%, of the total. Whereas, the runoff loss was merely 1.4%～12.6% of the total. The method of reclamation by landings herbage inter-planting resulted in the lowest annual organic carbon loss, which was 70.1%～70.7% lower than by longitudinal clean tillage, 42.1%～57.0% lower than by longitudinal herbage inter-planting, and 14.2%～17.8% lower than by landings clean tillage. Thus, it was recommended that the landings herbage inter-planting method be applied for the reduction of organic carbon loss in soil at tea plantations.