摘要
为揭示海南植胶区土壤有机碳分布特征,对其4种母质发育的典型砖红壤的64个土壤剖面数据进行分析.结果表明：4种母质发育的砖红壤0～60 cm土壤有机碳平均含量为6.29～8.33 g/kg,以铁质砖红壤最高,硅质砖红壤最低;0～60cm土壤有机碳平均密度为4.85～6.55 kg/m2,以铁铝质砖红壤最高,以铁质砖红壤最低;4种母质发育的砖红壤有机碳含量和有机碳密度在土壤剖面中具有明显的垂直分布性,随着土壤深度的增加呈降低趋势;土壤有机碳含量与pH呈极显著负相关（p＜0.01）,与土壤全氮呈极显著正相关（p＜0.01）.综上所述,海南植胶区的砖红壤为低有机碳密度土壤,其植胶生产中应改进土壤管理措施增加土壤固碳.
To reveal the soil organic carbon（SOC） distributed characteristics of latosols in rubber planting area of Hainan,the data from 64 soil profiles of 4 parent materials latosols were analyzed.The results showed that in 0～ 60 cm soil profile,SOC contents in the samples of 4 parent materials latosols were 6.29～8.33 g/kg.The highest occurred in iron latosols,while in siliceous latosols the value was the minimum; In 0～60 cm soil profile,SOC density ranged from 4.85 to 6.55 kg/m2.And the maximum and minimum values were found in ferral latosols and iron latosols respectively; Both SOC contents and density of all the 4 parent materials latosols showed the obvious vertical distribution in the soil profile,and decreased with the depth increasing; SOC contents had significantly negative correlations with pH（p＜0.01）,and significantly positive correlations with soil nitrogen（p＜0.01）.In summary,the SOC density of latosols in rubber planting area of Hainan province was generally low,and in practical rubber production,soil management practices should be improved to enhance the SOC immobilization in this region.
出处
《热带作物学报》
CSCD
北大核心
2013年第12期2326-2330,共5页
Chinese Journal of Tropical Crops
基金
中央级科研院所基本科研业务费(No.RC201203)
关键词
海南植胶区
砖红壤
土壤有机碳
Rubber planting area
Latosols
Soil organic carbon
