Isolation of free-living dinitrogen-fixing bacteria and their activity in compost containing de-inking paper sludge

被引：33

作者：

Beauchamp, CJ ^{[1
]}

Lévesque, G

Prévost, D

Chalifour, FP

机构：

[1] Univ Laval, Dept Phytol, Ste Foy, PQ G1K 7P4, Canada

[2] Agr & Agr Food Canada, Soil & Crops Res & Dev Ctr, Ste Foy, PQ G1V 2J3, Canada

来源：

BIORESOURCE TECHNOLOGY | 2006年 / 97卷 / 08期

基金：

加拿大自然科学与工程研究理事会;

关键词：

dinitrogen-fixing bacteria; compost; paper sludge; glucose; Pseudomonas balearica; Pseudomonas putida;

D O I：

10.1016/j.biortech.2005.04.041

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Knowledge of the microbiology of dinitrogen (N-2)-fixing bacteria in compost rich in de-inking paper sludge (DPS) is limited. Dinitrogen (N-2)-fixing bacteria from DPS composts were isolated and studied for their N-2-fixing activity in vitro and in vivo. Two Gram-negative N2-fixing isolates were identified as Pseudomonas. At 20 degrees C, both isolates revealed that N-2-fixing activity was higher than that of three arctic Pseudomonas strains. Their N-2-fixing activity was found to occur between 18 and 25 degrees C, a pattern that was similar to the reference isolate Azotobacter ATCC 7486. Composts successfully showed N-2-fixing activity after carbohydrate amendments both with and without inoculation of a N-2-fixing isolate. These results suggest that DPS composts support N-2-fixing bacteria and that N-2-fixing activity is dependent on a usable carbohydrate source. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：1002 / 1011

页数：10

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