Chin J Plan Ecolo ›› 2011, Vol. 35 ›› Issue (9): 906-913.doi: 10.3724/SP.J.1258.2011.00906

• Research Articles • Previous Articles     Next Articles

Nitrogenase activity of biological soil crusts and its response to hydrothermic factors in the Shapotou region of northern China

ZHANG Peng, LI Xin-Rong*, JIA Rong-Liang, HU Yi-Gang, and HUANG Lei   

  1. Shapotou Desert Experimental Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences,
    Lanzhou 730000, China
  • Received:2011-01-30 Revised:2011-07-12 Online:2011-09-01 Published:2011-09-01
  • Contact: LI Xin-Rong E-mail:lxinrong@ns.lzb.ac.cn

Abstract:

Aims In arid and semi-arid environments such as deserts, nitrogen is often the most limiting nutrient for biological activity. Biological soil crusts (BSCs) are an important component of vegetation in the Shapotou region in the Tengger Desert, northern China. However, their importance as contributors to soil fertility such as nitrogen fixation is relatively unknown. This study was conducted to quantify the potential nitrogenase activity (NA) of different types of BSCs in artificial vegetation areas, as well as their responses to variation in moisture and temperature.
Methods Algae crust, lichen crust and moss crust were collected from an artificial vegetation area in the Shapotou region, and were incubated under three gradients of moisture (3, 5 and 10 mm simulated rainfall) and temperature in open-top growth chambers from June to October. The NA was measured using acetylene reduction assay. One-way ANOVA and general linear models (GLM) procedure were applied to compare NA between treatments and interactions between type of BSCs, water and temperature.
Important findings NA for each type of BSC was highly variable, ranging from 2.5 × 103 to 6.2 × 104 nmol C2H4·m–2·h–1. The NA of algae crust was higher than that of lichen crust and moss crust (2.8 vs. 2.4 and 1.4 × 104 nmol C2H4·m–2·h–1, respectively). The three types of BSCs under the 3 mm simulated rainfall reached the maximum rate of nitrogen fixation, but > 3 mm did not affect NA. Significant negative correlation was observed between NA of all three types of BSCs and temperature. The optimal temperature for NA in algae crust, moss crust and lichen crust were 25–30 °C, 25–30 °C and 20–30 °C, respectively.

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] Lu Zhong-shu. Plant Growth Regutators in Relation to Plant Water Status[J]. Chin Bull Bot, 1985, 3(04): 1 -6 .
[2] Li Da Jue;Han Yun-zhou and Wan Li-ping. Studies on Germplasm Collections of Carthamus tinctorius IV Screening of the characterization of Seed Domancy[J]. Chin Bull Bot, 1990, 7(02): 50 -52 .
[3] . [J]. Chin Bull Bot, 1999, 16(增刊): 45 -46 .
[4] LU Jin-Yao;LUO Ai-Ling and LIANG Zheng. Some Improvement of TD-PAGE Technology[J]. Chin Bull Bot, 1998, 15(03): 69 -72 .
[5] LI Ling-Hao and CHEN Zuo-Zhong. The Global Carbon Cycle in Grassland Ecosystems and Its Responses to Global Change I . Carbon Flow Compartment Model, Inputs and Storage[J]. Chin Bull Bot, 1998, 15(02): 14 -22 .
[6] Huanhuan Xu, Jian Kang, Mingxiang Liang. Research Advances in the Metabolism of Fructan in Plant Stress Resistance[J]. Chin Bull Bot, 2014, 49(2): 209 -220 .
[7] . [J]. Chin Bull Bot, 2013, 48(1): 4 -5 .
[8] . [J]. Chin Bull Bot, 1996, 13(专辑): 45 .
[9] SHU Qun-Fang;ZHOU Lu;LI Wen-Bin;ZHANG LI-Ming and SUN Yong-Ru. Study on Gel Electrophoresis of Protein from Plant and Our Improved Methods[J]. Chin Bull Bot, 1998, 15(06): 73 -78 .
[10] ZHANG Zhi-Dong, ZANG Run-Guo. PREDICTING POTENTIAL DISTRIBUTIONS OF DOMINANT WOODY PLANT KEYSTONE SPECIES IN A NATURAL TROPICAL FOREST LANDSCAPE OF BAWANGLING, HAINAN ISLAND, SOUTH CHINA[J]. Chin J Plan Ecolo, 2007, 31(6): 1079 -1091 .