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玉米和大豆根际土壤性质的动态变化
引用本文:陈有鑑,黄艺,陶澍.玉米和大豆根际土壤性质的动态变化[J].植物生态学报,2002,26(3):283-0.
作者姓名:陈有鑑  黄艺  陶澍
作者单位: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,北京,100871
基金项目:国家自然科学基金项目 ( 4 0 0 310 10 ,40 0 2 410 1)
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,20 d后逐渐下降;pH值也是先升后降,但最高值出现在40~60 d前后。在研究的100 d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(Zea mays L.)和大豆(Glycine max Merr.)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

关 键 词:玉米  大豆  根际土壤
修稿时间:2001年5月22日

DYNAMIC CHANGE OF SOIL PROPERTIES IN THE RHIZOSPHERE OF MAIZE AND SOYBEAN
CHEN You-Jian,HUANG Yi and TAO Shu.DYNAMIC CHANGE OF SOIL PROPERTIES IN THE RHIZOSPHERE OF MAIZE AND SOYBEAN[J].Acta Phytoecologica Sinica,2002,26(3):283-0.
Authors:CHEN You-Jian  HUANG Yi and TAO Shu
Abstract:In order to investigate the dynamic change of soil properties in the rhizosphere, root mat boxes were applied to separate rhizosphere soil from root system, and a series of rhizosphere and non rhizosphere soils were sampled at different growth stages of maize and soybean. Wet soil pH, dissolved organic carbon (DOC) and microorganism mass were measured over time by routine analysis methods, while oxidation reductive potentials (Eh) were measured in situ by microelectrodes. The results showed that the properties of the rhizosphere soil varied significantly. During the early stage of growth, DOC concentration in rhizosphere increased rapidly and DOC decreased gradually after 20 days. Change in pH of the rhizosphere followed a similar pattern. During the 100 days of the study, Eh decreased continuously while microorganism mass increased gradually. The patterns of the changes were very similar for maize and soybean while the magnitude of the change in the maize rhizosphere were larger than that in the soybean rhizosphere.
Keywords:Zea mays L    Glycine max Merr    Rhizosphere
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