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应用生态学报 ›› 1997, Vol. 8 ›› Issue (1): 59-64.

• 研究论文 • 上一篇    下一篇

集约高产农业生态系统有机物分解及土壤呼吸动态研究

崔玉亭1, 韩纯儒1, 卢进登2   

  1. 1. 北京农业大学, 北京 100094;
    2. 湖北大学, 武汉 430062
  • 收稿日期:1995-10-18 修回日期:1996-01-28 出版日期:1997-01-25 发布日期:1997-01-25
  • 基金资助:

    国家教委博士点基金(930116)

Dynamics of organic material decomposition and soil respiration in intensive and high yield agroecosystem

Cui Yuting1, Han Chunru1, Lu Jindeng2   

  1. 1. Beijing Agricultural University, Beijing 100094;
    2. Hubei University, Wuhan 430062
  • Received:1995-10-18 Revised:1996-01-28 Online:1997-01-25 Published:1997-01-25

摘要: 以河北省吴桥县龙王河中心试区内的集约农业生态系统为例,借用生态学的方法,用网袋法测定了集约高产田(HYF)和中产田(MYF)小麦秸秆、小麦根、玉米秸秆和玉米根等4种有机物的分解动态;用隔离罐-碱液吸收法测定了土壤的呼吸动态;并以此推算了2种农田土壤C 的矿化率和平衡系数.结果表明,集约高产田的有机物分解与中产田没有明显区别,土壤呼吸量分别为1878.5和1725.7gCO2·m-2·a-1.土壤C的矿化率分别为5.64%和5.48%,平衡系数分别为1.84和1.86,表明集约高产并没有降低土壤C 的正平衡.

关键词: 集约农业, 有机物分解, 土壤呼吸, 土壤C平衡, 棉花, 时空分布, 纤维品质, 趋势分析

Abstract: In this paper, mesh-bag method is used to study the decomposition of straws and roots of maize and wheat, and isolated pot alkaline liquid assimilation method is used to determine soil respiration. Based on these, the yearly mineralization rate and balance coefficient of soil organic carbon are calculated. The decomposition dynamics of organic materials doesn't show any difference between middle and high yield fields, but the soil respiration rate of these two fields are 1725.7 and 1878.5 g CO2·m-2·yr-1,respectively. The yearly mineralization rates of soil organic carbon are 5.48 and 5.64%, and the balance coefficients are 1.86 and 1.84 respectively. The results suggest that intensive management of crop field doesn't decrease the content of soil organic carbon.

Key words: Intensive agriculture, Organic material decomposition, Soil respiration, Soil carbon balance, cotton, spatial and temporal distribution, trend analysis, fiber quality