Fine Root Biomass Seasonal Dynamics and Spatial Changes of Sabina vulgaris and Artemisia ordosica Communities in MU US Sandland

JOURNAL OF DESERT RESEARCH

2008, Vol. 28

Issue (3): 455-461 DOI:

生物土壤与生态

Fine Root Biomass Seasonal Dynamics and Spatial Changes of Sabina vulgaris and Artemisia ordosica Communities in MU US Sandland

QIN Yan¹, WANG Lin-he¹, ZHANG Guo-sheng¹, HU Yong-ning¹, SIQING Bi-li-ge¹, ZHANG Zhong-shan²

1.College of Ecology Environment, Inner Mongolia Agricultural University, Hohhot 010019, China; 2.Research Center of Development and Management in Mu Us Sandland, Ordos 017300, Inner Mongolia, China

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Abstract

In order to study the seasonal dynamics and spatial changes of roots biomass in sandland ecosystem, the fine root biomass dynamic(≤2 mm in diameter) of Sabina vulgaris and Artemisia ordosica communities in the soil layers of 0—90 cm was surveyed by sequential root coring method in MU US sandland from early April to October, 2005. The results showed that the total fine root biomass of Sabina Vulgaris was between 13.87 and 18.22 t·hm-2, accounting for 60.10% of its total root biomass, the total fine root biomass of Artemisia ordosica fluctuated between 1.173 and 1.389 t·hm-2, being 73.04% of its total root biomass. The mean fine root biomass of Sabina Vulgaris was 12.50 times as high as that of Artemisia ordosica. The curves of fine root biomass of Sabina vulgaris and Artemisia ordosica showed two peaks, the appearance of higher fine root biomass of Sabina Vulgaris was in April and August, the maximum fine root biomass of Artemisia ordosica appeared in June and October. Living fine root biomass of Sabina vulgaris and Artemisia ordosica showed an increasing tendency, but dead fine root biomass was opposite. The fine root biomass of Sabina vulgaris and Artemisia ordosica decreased obviously along with the deepening of soil layers, whereas the dynamic changes of fine root between different soil layers were different to the total root biomass in different seasons. As for spatial distribution, the fine root biomass of Sabina vulgaris from slope top to bottom was 16.8067 t·hm-2, 16.1656 t·hm-2 and 10.9834 t·hm-2, showing a descending trend; the ratio of fine root biomass of Sabina Vulgaris was gently increasing. The highest value of fine root biomass of Artemisia ordosica was at the top of slope, the change of fine root biomass from middle to bottom was not obviously different; the ratio of fine root biomass of Artemisia ordosica did not change significantly with slope position.

Key words: Sabina vulgaris Artemisia ordosica fine root biomass seasonal dynamics spatial changes

Received: 27 August 2007 Published: 20 May 2008

ZTFLH:

Q945.12



	Articles by authors
	QIN Yan
	WANG Lin-he
	ZHANG Guo-sheng
	HU Yong-ning
	SIQING Bi-li-ge
	ZHANG Zhong-shan

Cite this article:

QIN Yan;WANG Lin-he;ZHANG Guo-sheng;HU Yong-ning;SIQING Bi-li-ge;ZHANG Zhong-shan. Fine Root Biomass Seasonal Dynamics and Spatial Changes of Sabina vulgaris and Artemisia ordosica Communities in MU US Sandland. JOURNAL OF DESERT RESEARCH, 2008, 28(3): 455-461.

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http://www.desert.ac.cn/EN/ OR http://www.desert.ac.cn/EN/Y2008/V28/I3/455

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