浙江农业学报

• 环境科学 • 上一篇    下一篇

五十年来宁波市耕作土壤有机质时空变异研究

  

  1. (1 宁波市种植业管理总站,浙江 宁波 315000;2 奉化市农业技术服务总站,浙江 宁波 315500;3 鄞州区农业技术服务站,浙江 宁波 315100;4 宁海县农业技术推广总站,浙江 宁波 315600;5 余姚市耕地质量管理站,浙江 宁波315400;6 象山县农产品质量监测中心,浙江 宁波315700)
  • 出版日期:2015-01-25 发布日期:2015-01-17

Temporal-spatial variation of organic matter in cultivated soils in Ningbo City over 50 years

  1. (1 Planting Management Station of Ningbo City,Ningbo 315000,China; 2 Agricultural Techniques Extension Station of Fenghua City, Ningbo 315500, China; 3 Agricultural Techniques Extension Server of Yinzhou District, Ningbo 315100, China; 4 Agricultural Techniques Extension Station of Ninghai County, Ningbo 315600, China; 5 Farmland Quality Management Station of Yuyao City, Ningbo 315400, China; 6 Agricultural Products Quality Monitoring Center of Xiangshan County, Ningbo 315700, China)
  • Online:2015-01-25 Published:2015-01-17

摘要: 为明确宁波市土壤有机质的长期变化情况,通过历史资料和近年实施测土配方施肥项目时所采集的5 704个土样,分析比较研究了五十年来宁波市耕作土壤有机质的时空变异特征。结果表明,宁波市耕作土壤有机质含量先从1958年第一次土壤普查时的22.4 g·kg-1极显著(P<0.01)增加到1980年第二次土壤普查时的34.8 g·kg-1,增加了55%;但到2008年又极显著下降至31.0 g·kg-1,降低了10.9%。分析认为,耕作制度和施肥结构的改变是引起土壤有机质变化的主要原因。宁波市耕作土壤有机质在各土壤分布区中的变化趋势为水网平原>丘陵山区>河谷平原>滨海平原,这主要与土壤耕作的历史长短、水文以及因海拔升高而引起的气候变化有关。

关键词: 土壤有机质, 时空变异, 宁波市

Abstract: By comparing the current soil organic matter(SOM) content data of 5 704 cultivated soil samples in Ningbo City with the past data, temporal\|spatial variation of SOM in Ningbo City during 50 years were studied. The results showed that SOM content of the cultivated soils changed greatly over 50 years. From the first general detailed soil survey in 1958 to the second general detailed soil survey in 1980s, the mean content of organic matter increased from 22.4 g·kg-1 to 34.8 g·kg-1 by 55%, and the difference was significant (P<0.01). But, the mean SOM content decreased to 31.0 g·kg-1 significantly (P<0.05) by 10.9% from 1980s to 2008. The SOM distribution showed that the water net plain area had higher organic matter contents than the hilly area, and the valley plain area had higher contents than the coastal plain area. The history of cultivation and hydrology and climate change caused by increasing elevation were main factors affecting the spatial variability of SOM.

Key words: soil organic matter, temporal\, spatial variability, Ningbo City