中国水稻科学

中国水稻科学 ›› 2012, Vol. 26 ›› Issue (5): 576-582.DOI: 10.3969/j.issn.10017216.2012.05.010

• 研究报告 • 上一篇    下一篇

云南元阳梯形稻田土壤碳氮空间分布及其影响因素

李凤博1 ,卢光德2  ,周锡跃1  ,岳超2 ,徐春春1  ,倪会祥2  ,杨秀美2  ,方福平1,*   

  1. 1 中国水稻研究所，浙江 杭州310006； 2 元阳县农业技术推广中心， 云南 元阳 662400；
  • 收稿日期:2011-12-14 修回日期:2012-04-11 出版日期:2012-09-10 发布日期:2012-09-10
  • 通讯作者: 方福平1,*
  • 基金资助:

    国家自然科学基金资助项目（70973143）；浙江省自然科学基金资助项目（Y5110259）。

Spatial  Distributions of Soil Organic Carbon and Total Nitrogen Concentrations, and Their Influencing Factors in Terraced Paddy Fields of Yuanyang County, China

 LI Fengbo 1, LU Guangde 2, ZHOU Xiyue 1, YUE Chao 2, XU  Chunchun 1, NI Huixiang 2, YANG Xiumei 2, FANG  Fuping  1,*   

  1. 1 China National Rice Research Institute, Hangzhou  310006, China; 2 AgroTechnical  Extension Center of Yuanyang County, Yuanyang 662400, China;
  • Received:2011-12-14 Revised:2012-04-11 Online:2012-09-10 Published:2012-09-10
  • Contact: FANG Fuping1,*

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摘要： 采用地统计、方差分析方法，研究了云南元阳土壤有机碳（SOC）、全氮（TN）的空间分布及其影响因素。该区域内水田土壤表层（0~20 cm)有机碳、全氮含量分别为21.38 g/kg和1.65 g/kg，变异系数分别为36.90%和32.95%，属于中等程度变异。土壤有机碳、全氮的半方差模型均为球型，具有中等程度的空间自相关性（块金/基台值分别为0.67和0.71）。土壤有机碳、全氮含量均随海拔上升而增加。土壤有机碳和全氮含量均随着肥料投入水平上升而降低，过量施肥使土壤有机碳、全氮含量略有增加，但会影响肥料利用效率。因此，应根据土壤养分空间分布格局加强农业生产管理措施调控，以提高土地生产力。

关键词: 土壤有机碳, 土壤全氮, 空间分布, 梯形稻田

Abstract: Spatial distributions of soil organic carbon (SOC) and total nitrogen (TN) concentrations, and their influencing factors in terraced paddy fields of Yuanyang County  were analyzed by geostatistics and  variance analysis.  The SOC and TN  concentrations  in the surface layer(0-20 cm) were 21.38 g/kg and 1.65 g/kg, and moderately variation(36.90% and 32.95%), respectively, and demonstrated moderate spatial dependence according to the nugget ratios (0.67 and 0.71). The semivariogram of SOC and TN were bestfitted by spherical models.   SOC and TN concentrations  increased  with  rising elevations, while decreased with increasing fertilizer inputs.  SOC and TN concentrations   were improved with the excessive fertilization, but  had a negative impact on  the   fertilizer use  efficiency. In all,   attentions should be paid to strengthening  agricultural production management  for improving  land productivity  according to spatial distributions of soil nutrients. 

Key words: soil organic carbon, soil total nitrogen, spatial distribution, terraced paddy field

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