鄂东南弃耕地自然恢复过程中微生物碳动态变化

被引:1
作者
魏斌 [1 ,2 ]
贾国梅 [3 ]
杨卓 [1 ]
李俊清 [1 ]
机构
[1] 北京林业大学省部共建森林培育与保护教育部重点实验室
[2] 辽宁省林业调查规划院
[3] 三峡大学化学与生命科学学院
关键词
微生物碳; 有机碳; 弃耕; 次生演替;
D O I
暂无
中图分类号
S154.3 [土壤微生物学];
学科分类号
071012 ; 0713 ;
摘要
耕地弃耕后植被次生演替过程中土壤微生物碳的大小和活性的研究结果表明,土壤有机碳和微生物碳呈现先下降后增大的趋势;在75a的弃耕地中,有机碳和微生物碳的含量达到天然植被的115%和82.9%,而且有机碳与微生物碳呈现显著正相关(P<0.05);微生物代谢熵与微生物碳呈现极显著负相关(P<0.01),呈现先上升后下降的趋势;在次生演替初期,土壤有效基质逐渐降低,而在演替后期有效基质不断增加,有益于土壤有机碳和微生物碳的提高,有利于土壤肥力的提高。
引用
收藏
页码:159 / 161+166 +166
页数:4
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