玉米和大豆根际土壤性质的动态变化

被引：14

作者：

陈有

黄艺

陶澍

机构：

[1] 北京大学城市与环境学系/地表过程分析与模拟教育部重点实验室

来源：

植物生态学报 | 2002年 / 03期

关键词：

玉米; 大豆; 根际土壤;

D O I：

暂无

中图分类号：

S154.4 [土壤-植物系统];

学科分类号：

摘要：

采用根垫模拟装置制备根际土壤 ,并改变根垫与土壤接触时间以研究植物生长不同时期根际土壤性质的动态变化。研究结果表明 ,植物生长不同时期根际土壤性质变化有明显差异 :植物生长前期 ,根际土壤水溶性有机碳 (DOC)含量急剧增加 ,2 0d后逐渐下降 ;pH值也是先升后降 ,但最高值出现在 40～ 6 0d前后。在研究的 10 0d内 ,氧化还原电位 (Eh)始终呈下降趋势 ,而微生物量则持续上升。玉米 (ZeamaysL .)和大豆 (GlycinemaxMerr.)根际土壤性质变化趋势基本一致 ,但玉米根际土壤变化幅度显著高于大豆。

引用

页码：283 / 287

页数：5

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