四川农业大学学报 ›› 2012, Vol. 30 ›› Issue (04): 445-450.doi: 10.3969/j.issn.1000-2650.2012.04.014

• • 上一篇    下一篇

成都平原水田土壤有机质时空变异分析——以彭州市为例

杨刚1, 张冀2, 陶由之1, 叶小丽3, 伍钧1   

  1. 1. 四川农业大学资源环境学院, 四川 温江 611130;
    2. 四川省农科学院土壤肥料研究所, 成都 625014;
    3. 雅安市雨城区农业局, 四川 雅安 625014
  • 收稿日期:2012-06-11 出版日期:2012-12-31 发布日期:2017-02-28
  • 作者简介:杨刚,讲师,主要研究方向是土壤污染化学与修复、环境分析化学等,E-mail:yg8813@yahoo.com.cn。
  • 基金资助:
    科技部"十一五"科技支撑计划(No.2008BADC4B04)

Temporal and Spatial Variations in Soil Organic Matter of Paddy Fields in the Chengdu Plain: A Case Study of Pengzhou County

YANG Gang1, ZHANG Ji2, TAO You-zhi1, YE Xiao-li3, WU Jun1   

  1. 1. College of Resource and Environment, Sichuan Agricultural University, Wenjiang 611130, Sichuan, China;
    2. Soil Fertilizer Institute, Sichuan Academy of Agriculture sciences, Chengdu 610066;
    3. Soil and Fertilizer Station, Agriculture Bureau in Yucheng, Yaan 625014, Sichuan, China
  • Received:2012-06-11 Online:2012-12-31 Published:2017-02-28
  • Contact: 伍钧,教授,主要从事土壤污染修复方面,农产品质量研究,E-mail:wuj1962@163.com。 E-mail:wuj1962@163.com

摘要: [目的] 了解土壤有机质时空变化情况,对提高耕地利用率和实现农田土壤可持续利用有重要意义。[方法] 本研究以彭州市为例,参照1982年第二次土壤普查样点,采用GPS定位采集了202个水田土壤样品,结合地统计学分析了1982-2007年25年间成都平原水田土壤有机质时空变异特征。[结果] 时间上,水田土壤有机质平均含量由25.65g/kg(1982年)增加到33.04g/kg(2007年),25年间水田土壤有机质明显提高,有机质含量等级大部分由Ⅲ级增加为Ⅱ级;空间上,土壤有机质分布格局发生了强烈改变,高值区从东南转向中部,低值区从东北转向西南,水田土壤有机质含量增加区域占调查区总面积的94.2%,水田土壤固碳作用比较明显。[结论] 彭州市水田土壤有机质分布格局随时间变化而发生了强烈的改变,在指导水田土壤施肥,农田开发和制定相关政策时应加以考虑。

关键词: 土壤有机质, 水田, 时空变异, 成都平原

Abstract: [Objective] Knowing the tempo-spatial variations of soil organic matter(SOM) is very important to improve the utilization efficiency of cultivated land and for agricultural sustainable development. [Method] Based on the second soil census in 1982, 202 paddy soil samples were collected using GPS technique in Pengzhou. Tempo-spatial variations of SOM in the paddy fields from 1982 to 2007 were evaluated using geostatistics and geographic information system. [Results] SOM contents were obviously increased in paddy fields. The average SOM content was increased from 25.65 g/kg in 1982 to 33.04 g/kg in 2007. Most of SOM content grade was improved from grade Ⅲ to Ⅱ. There were significant changes in the spatial distribution of SOM between two years. The areas of high SOM content were shifted from southeast to central and the areas of low values were shifted from northeast to southwest. SOM was increased in 94.2% of the investigated paddy fields. Therefore, paddy soil was better for carbon fixation. [Conclusion] Distribution patterns in SOM of paddy fields in Pengzhou varied strongly with time. This result may be helpful to guide paddy field fertilization and to formulate the relevant policies.

Key words: soil organic matter, paddy field, tempo-spatial variation, Chengdu plain

中图分类号: 

  • S153.6