果园生草模式土壤固碳潜力——以福建省为例

以定位试验为平台,研究了果园生草管理模式对土壤有机碳含量的影响,并通过分析土壤有机碳的变化量来估算福建省果园生草管理的土壤固碳潜力。结果表明：与1996年相比,2007年生草果园0-20 cm土壤有机碳含量提高了37.0%,土壤容重降低了1.8%。与清耕模式相比,生草模式更有利于土壤有机碳的积累,其土壤碳年变化量是清耕模式的3.2倍,土壤固碳速率为714.52 kg.hm-2.a-1。福建省果园生草模式土壤固碳潜力为3.26×105t.a-1,其中,以漳州地区最高,占36.3%。

Study on soil carbon sequestration potential of sod cultivated orchard --Taking Fujian Province as a case

Long term experiment at Youxi Agro-Ecological Station in Fujian was conducted to study the long term effects of orchard green cover and clean tillage on soil organic carbon on the basis of the Experiment Station in Fujian. Carbon sequestration potential under orchard green cover management in Fujian was estimated by analyzing the change of soil organic carbon under different soil management regimes. The results showed that compared with 1996, the organic carbon content of 0 -20 cm soil in green coveting orchard increased by 37.0% in 2007, and that soil hulk density of it reduced by 1.8%. Compared to clean tillage mode, orchard green cover was more conducive to the accumulation of soil organic carbon. The annual changes in soil carbon content under green covering was 3.2 times that of clean tillage mode, and that soil carbon sequestration rate was 714.52 kg · hm^-2 · a^-1. Thus soil carbon sequestration potential of orchard green cover was estimated to be 3.26 × 10^3 t · a^-1 in Fujian Province, of which the highest in Zhangzhou, occupying on 36.3%.