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丘陵红壤蔗区土壤有机质的时空变异特征
引用本文:黄智刚,李保国,胡克林.丘陵红壤蔗区土壤有机质的时空变异特征[J].农业工程学报,2006,22(11):58-63.
作者姓名:黄智刚  李保国  胡克林
作者单位:1. 中国农业大学资源与环境学院,教育部植物-土壤相互作用实验室,北京,100094;广西大学农学院,南宁,530005
2. 中国农业大学资源与环境学院,教育部植物-土壤相互作用实验室,北京,100094
基金项目:国家高技术研究发展计划(863计划);教育部长江学者和创新团队计划;广西大学校科研和教改项目
摘    要:采用地统计学和GIS相结合的方法,研究了甘蔗连作19年(1980~1999年)的低丘陵红壤蔗区土壤有机质含量的时空变异特征。研究结果表明:由于土壤侵蚀和土地利用格局的影响,1980年的土壤有机质与地形坡度为极显著负相关。在长期甘蔗连作下,地形坡度对1999年的土壤有机质空间分布已没有影响,而有机肥施用的侧重方向使得土壤有机质与经纬度、海拔高度都有相关性。土壤有机质的时空变异与蔗区耕作管理的精细化程度有关,精细化程度高的高产蔗区的土壤有机质平均降幅为11%,而精细化程度低的低产蔗区土壤有机质则平均增幅为50%。大量施用源自甘蔗的有机肥已造成蔗区土壤养分的不平衡。

关 键 词:土壤有机质  蔗区  地形  时空变异
文章编号:1002-6819(2006)11-0058-06
收稿时间:2005-11-28
修稿时间:2006-07-26

Characteristics of the spatio-temporal changes of soil organic matter of sugarcane field in red soil hill areas
Huang Zhigang,Li Baoguo and Hu Kelin.Characteristics of the spatio-temporal changes of soil organic matter of sugarcane field in red soil hill areas[J].Transactions of the Chinese Society of Agricultural Engineering,2006,22(11):58-63.
Authors:Huang Zhigang  Li Baoguo and Hu Kelin
Institution:Key Laboratory of Plant-Soil Interactions, Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100094, China; Agricultural College, Guangxi University, Nanning 530005, China;Key Laboratory of Plant-Soil Interactions, Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100094, China;Key Laboratory of Plant-Soil Interactions, Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100094, China
Abstract:Temporal and spatial changes of soil organic matter(SOM) content in the sugarcane field after 19-year interval(from 1980 to 1999) were evaluated using geostatistics and geographic information system(GIS). Results show that there are negatively significant correlation between the slopes of terrain and SOM content in 1980, as a result of soil erosion and land use pattern changes. The slopes of terrain do not have obviouse impact on the spatial distribution of SOM content in 1999 under long-term sugarcane monoculture. There are significant correlations among the elevation, lattitude, longitude and SOM contents due to the stress direction when applying organic manures. The spatio-temporal changes of SOM content are related to the degree of intensive cultivation. The SOM content of the higher yield fields with high degree of intensive cultivation decreases 11% on average, while the SOM content of lower yield fields increases 50% on average under low degree of intensive cultivation. Lots of sugarcane-derived organic matter has already caused soil nutrition imbalance.
Keywords:soil organic matter  sugarcane field  terrain  spatio-temporal change
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