摘要
对钟祥市2005年和1981年2次土壤肥力调查数据进行分析,比较耕地养分状况的时空变化特征。结果表明:耕地土壤有机质含量上升,且表现出高有机质含量和极低有机质含量的耕地土壤面积所占比例减少,原来有机质含量中等的耕地土壤面积所占比例增加,总体趋向均一化;土壤速效磷含量的变化与有机质含量呈类似趋势,总体含量升高;土壤钾含量处中等水平,含钾量高(有效K≥150.0 mg/kg)的耕地已明显下降,总体呈耗减状态;土壤酸化趋势较为明显,尤以旱地酸化突出;土壤有效Zn、Fe、Mn含量较丰富,但土壤有效B、Mo较为缺乏。这些结果可为当地合理施肥提供科学依据。
Based on the investigation of farmland soil fertility of Zhongxiang City, Hubei Province, the spatial and temporal changes of the soil fertilities between 2005 and 1981 were compared. Results indicated that the soil organic matter contents increased and the area percentages of soil with high or very low organic matter contents in the total cultivated land reduced during the 24 years. Soil available P had similar changes with soil organic matter contents. Soil K contents was at middle level and generally reduced with the time. Soil tended to be acid with obvious dry land acidification. Soil available Zn,Fe,Mn content were rich while the soil available B, Mo were deficient. These will provide scientific foundation for the soil management and fertilizer use in the region.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
2009年第4期431-437,共7页
Journal of Huazhong Agricultural University
基金
农业部耕地地力调查与质量评价项目(2005-NYB-06-10)资助
关键词
耕地
土壤养分
时空变化
湖北省钟祥市
farmland
soil fertilities
spatial and temporal changes
Zhongxiang City, Hubei Province
