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生态学杂志 ›› 2004, Vol. ›› Issue (5): 228-231.

• 研究简报 • 上一篇    下一篇

施用有机肥对棕壤和草甸土固钾作用的影响研究

杨春璐1,3, 梁成华2, 孙铁珩1, 陈新之2, 杜立宇2   

  1. 1. 中国科学院沈阳应用生态研究所, 沈阳, 110016;
    2. 中国科学院研究生院, 北京, 100039;br>3. 沈阳农业大学土地与环境学院, 沈阳, 110161
  • 收稿日期:2004-02-12 修回日期:2004-04-23 出版日期:2004-10-10
  • 通讯作者: 梁成华
  • 基金资助:
    国家自然科学基金项目(40071052);国家自然科学基金重点项目(20337010);沈阳大学沈阳环境工程重点实验室基金资助项目(03001)

Effect of organic manure application on the fixation of potassium in brown soil & meadow soil

YANG Chunlu1,3, LIANG Chenghua2, SUN Tiehang1, CHEN Xinzhi2, DU Liyu2   

  1. 1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
    2. Department of Soil and Environment, Shenyang Agricultural University, Shenyang 110161, China;
    3. Graduate School of Chinese Academy of Sciences, Beijing 100039, China
  • Received:2004-02-12 Revised:2004-04-23 Online:2004-10-10

摘要: 通过室内恒湿和干湿交替培养试验,研究了沈阳地区耕地棕壤和草甸土的固钾特征,及其施用有机肥后对土壤固钾作用的影响。结果表明,在保持土壤处于田间持水量的恒湿条件下,两种土壤对外源钾都能够产生快速固定作用,经过1d培养土壤的固钾作用就可以达到平衡,但干湿交替培养可以提高土壤固钾量26.80%~33.27%;土壤施用有机肥后,在恒湿和干湿交替培养条件下均可以降低土壤的固钾强度,其中,施用有机肥6%处理的恒湿培养15d后,棕壤和草甸土的固钾量分别降低了25.71%和36.62%。

关键词: 黄瓜, 根际, 病原菌, 拮抗菌, 种群数

Abstract: The characteristic of K-fixation on farming brown soil & meadow soil in Shenyang area and the effect of organic manure application on K-fixation was studied with constant moisture at water holding capacity and wetting-drying incubation experiments.In all studies,483.72 mg K·kg-1 soil was applied before monitoring of K fixation.Results indicated that the process of fixation to extra-K was rapid in both of the two soils,and the fixation reaction reached equilibrium within 1day on field capacity incubation. The K-fixation capacity can be increased by 26.80%~33.27% with wetting-drying incubation compared to constant field capacity incubation.The power of K-fixation can be decreased by organic manure application with both kinds of incubation.The capacity of K-fixation decreased 25.71% and 36.62% on brown soil and meadow soil respectively after 15 days of wetting-drying incubation with 6% organic manure applied.

Key words: Cucumber, Rhizosphere, Pathogen, Antagonistic bacteria, Population number

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