An analysis of the compensation mechanism of decomposition processes in the forest by using high nitrogen stresses

高氮胁迫下森林分解过程的补偿机制分析

• 批准号: 14560112
• 负责人: SUZUKI Akira
• 金额: $ 1.92万
• 依托单位: Chiba University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14560112/
• 关键词: litter decomposition; high nitrogen concentration stress; ammonia fungi; larch; lodge-pole pine; urea application; pH; ammonium nitrogen concentration; 尿素施与; 植物質分解; アンモニア苗; 高pH; 土壌理化学条件; かく乱

A large amount of urea was spread over on the forest floor of larch forest in Japan and that of lodge-pole pine forest in Canada. pH values of the urea plots suddenly increased from 5-7 to 9, and then gradually declined to those levels of control plots within 3 months. NH_4-N and NO_3-N showed similar changing patterns observed in pH but returned slower to the control levels than pH. Seven and six species of saprobic ammonia fungi occurred on the urea plots in the larch and the pine forest, respectively. In the urea treatment, the decomposition of larch leaves embedded in the larch forest floor was accelerated faintly whereas that, of larch wood disks embedded in the larch forest was inhibited. In the pine forest, no statistical significant difference was observed in the decomposition rates between the pine leaves and the pine wood disks in the urea plots and those in the control plots. Coprinus sp. isolated from the urea plot of the pine forest and Coprinus phlyctidosporus isolated in Japan grew vigorously in the NH_4OH added larch leaves that had been sterilized by γ-rays irradiation. These suggest that in both forests, the ammonia fungi compensated the decomposition processes instead of previously dominating fungi under high nitrogen stresses.

大量尿素撒在日本落叶松林和加拿大黑松林的林地上，尿素地块的pH值突然从5-7上升到9，然后逐渐下降到9。 3 个月内，对照样地的 NH_4-N 和 NO_3-N 的 pH 值显示出相似的变化模式，但恢复到对照水平的速度慢于 7 种和 6 种腐生氨真菌。尿素处理分别在落叶松林和松林中，嵌入落叶松林地表的落叶松叶的分解略有加速，而嵌入落叶松林的落叶松木盘的分解则受到抑制。 ，尿素样地和对照样地中的松叶和松木盘之间的分解率没有观察到显着差异。松林的尿素区和日本分离的鬼伞在经过γ射线照射灭菌的添加NH_4OH的落叶松叶中生长旺盛，这表明在这两种森林中，氨真菌补偿了分解过程，而不是以前占主导地位的真菌。高氮胁迫。

项目成果

鈴木 彰: "アンモニア菌の生理・生態とその生物地理的分布,キノコの自然史(小林・高橋 編)"北海道大学総合博物館. 60 (2004)

Akira Suzuki：“氨细菌的生理学和生态学及其生物地理分布，蘑菇的自然历史（小林和高桥编辑）”北海道大学博物馆60（2004）。

鈴木 彰(分担執筆): "土壌微生物生態学(第2章:土壌微生物を制御する水、空気、湿度、pH; pp.20-34)"朝倉書店. 229 (2003)

Akira Suzuki（合著者）：“土壤微生物生态学（第 2 章：控制土壤微生物的水、空气、湿度和 pH 值；第 20-34 页）”朝仓书店 229（2003 年）。

Suzuki, Akira: "Physiology and ecology of ammonia fungi and its biogeographical distribution"Natural history of mushrooms (eds. Kobayashi, Takahito & Takahashi Hideki) (In Japanese) (The Hokkaido University Museum). 5-12 (2004)

铃木晃：“氨真菌的生理学和生态学及其生物地理分布”蘑菇的自然历史（小林高人编）