摘要
土壤有机质和全量氮磷钾素含量状况等是土壤肥力重要的物质基础。在紫色丘陵区3km2典型样区内,按5个hm-2取样,分析和探讨不同土地利用方式下(旱地、水田、撂荒地和人工林)土壤有机质和全量氮磷钾含量状况,为农业可持续发展、生态环境建设和紫色土区土地利用结构调整提供理论依据。结果表明,旱地土壤有机质含量和土壤C/N值在四种利用方式下最低,分别为4.49±0.38gkg-1和5.58±0.31gkg-1,林地土壤全磷含量和全钾含量最低,分别为0.74±0.07gkg-1和13.77±1.37gkg-1,撂荒地土壤全氮含量最低,为0.79±0.07gkg-1,而水田的各项指标则处于中上水平;四种土地利用方式下土壤有机质和全量氮磷钾含量与全国平均含量水平相比较高;有机质含量与全氮含量呈线性关系,且均达极显著水平(P<0.01)。
Soil organic matter nitrogen, phosphorus and potassium were deterimed in the different land-use patterns （dryland, cropland, wasteland and woodland） in purple hill area, which aimed at providing gist for agriculture sustainable development, entironment construction and structural adjustment of land-use in Purple Hill Area. The results showed that soil organic matter content and soil C/N quantity of dryland were the lowest in 4 land-use patterns （4.49 ± 0.38g kg^-1 and 5.58 ± 0.31g kg^-1）. The contents of soil total P and K in woodland were the lowest （0.74 ± 0.07g kg^-1 and 13.77 ± 1.37g kg^-1）. Soil total N content in wasteland was the lowest （0.79 ± 0.07g kg^-1）. Contents of soil organic matter, N, P and K in the 4 land-use models were in a higher level compared with that the average level of nation. Soil organic matter had linear relation with soil total N（P〈0.01）.
出处
《土壤通报》
CAS
CSCD
北大核心
2009年第2期310-314,共5页
Chinese Journal of Soil Science
基金
重庆市科委自然科学基金“稻田保护性耕作对有机碳截存作用机理研究”(9066)
国家科技支撑计划项目(2007BAD87B10-02、2008BABA7B09-03)项目资助
关键词
土壤有机质
全氮
全磷
全钾
紫色丘陵区
土地利用
Soil organic matter
Total nitrogen
Total phosphorus
Total potassium
Purple hill area
Land-use
