ACETYLENE-REDUCTION BY CRYPTOGAMIC CRUSTS FROM A BLACKBRUSH COMMUNITY AS RELATED TO RESATURATION AND DEHYDRATION

被引：58

作者：

JEFFRIES, DL

KLOPATEK, JM

LINK, SO

BOLTON, H

机构：

[1] Division of Science and Mathematics, University of the Ozarks, Clarksville

来源：

SOIL BIOLOGY & BIOCHEMISTRY | 1992年 / 24卷 / 11期

关键词：

D O I：

10.1016/0038-0717(92)90059-7

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

N2 fixation Microcoleus and Scytonema dominated cryptogamic crusts as related to the resaturation-dehydration phenomenon was estimated using the acetylene reduction assay. The mean maximum fixation rates were estimated to be 6.3 nmol N2 m-2 s-1 for Microcleus and 9.4 nmol N2 m-2 s-1 for Scytonema crusts. Nitrogen inputs were estimated to be 0.7-3.6 kg N2 ha-1 yr-1 for a relic community, 0.4-2.0 kg N2 ha-1 yr-1 for a light grazing community, and 0.02-0.17 kg N2 ha-1 yr-1 for moderate and heavily grazed communities.

引用

页码：1101 / 1105

页数：5

共 26 条

[1] Algae as pioneers in plant succession and their importance in erosion control [J].