摘要
以海南岛东部地区的4种土地利用方式(水稻田、抛荒地、果园地、橡胶林地)为研究对象,研究其土壤有机碳分布特征。结果表明:就整个土壤剖面(0~30cm)而言,4种土地利用方式下土壤有机碳含量的高低顺序表现为水稻田>抛荒地>果园地>橡胶林地;各土地利用方式下土壤有机碳的表聚作用明显,并随着土壤层的加深土壤有机碳含量逐渐递减。相关性分析结果表明:水稻田、抛荒地的土壤质地和土壤pH均对土壤有机碳含量具有显著的控制效应;果园地与橡胶林地的土壤有机碳含量也受土壤质地的影响,但与土壤pH不存在显著相关性。因此,为了海南岛农业生产的可持续发展以及该区域土壤有机碳储量的稳定,提倡通过秸秆还田、增施有机肥等保护性耕作措施来维持海南岛土壤的基础地力和肥力,并保护和增加水稻田面积以提高研究区土壤的固碳潜力。
Distribution characteristics of organic carbon(SOC)in soils from fields of 4 different land-use patterns(i.e.,paddy field,abandoned land,orchard land,and rubber forest land)in eastern Hainan Island were studied.The results showed that the SOC contents in 0-30 cm layer of the soil ranked in the order of paddy field>abandoned land>orchard land>rubber forest land.There were significant differences on SOC accumulation among the soils that decreased gradually with increasing depth.The correlation analysis showed that SOC in the paddy field or the abandoned land was significantly affected by the makeup and pH of the soil,while that in the orchard land or the rubber forest land also affected by the makeup but not the pH.Thus,for a sustainable agricultural production and a desirable SOC reserve in soil,conservation measures in tillage,such as returning straws to the rice field after harvest and applying organic fertilizer on the land,should be implemented and enforced to warrant adequate soil fertility and available land for rice farming,as well as carbon sequestration capacity of the soil for the areas on the island.
作者
李燕
赵志忠
吴丹
贾丽
邢瑶丽
LI Yan;ZHAO Zhi-zhong;WU Dan;JIA Li;XING Yao-li(School of Geography and Environmental Science,Hainan Normal University,Haikou, Hainan 571185,China)
出处
《福建农业学报》
CAS
北大核心
2018年第8期820-827,共8页
Fujian Journal of Agricultural Sciences
基金
国家自然科学基金项目(41261062)
海南省重点科技计划项目(ZDXM20130021)
海南省自然科学基金创新团队项目(2017CXTD006)
关键词
土地利用方式
土壤有机碳
分布特征
land-use patterns
soil organic carbon
distribution characteristics
