Soil microbial quantity and its relations with ecological factors in northern alp region of Hengduan Mountains

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Soil microbial quantity and its relations with ecological factors in northern alp region of Hengduan Mountains

SHAO Baolin¹;GONG Guoshu¹;ZHANG Shirong²;YU Xia¹;YANG Danling¹, ZHANG Hong¹; LIU Xiaolu¹

¹College of Agronomy, Sichuan Agricultural University, Yaan 625014, China;²College of Resources and Environment, Sichuan Agricultural University, Yaan 625014, China

Received:2005-11-15 Revised:2006-04-12 Online:2006-08-10 Published:2006-08-10

Abstract

Abstract: With the help of GPS (Global Position System), thirtyfive surface soil samples were collected from the northern alp region of Hengduan Mountains in Qinghai Xizang Plateau. The quantities of soil fungi, bacteria and actinomycetes were determined by dilution plate technique, and their correlations with soil fertility, soil humidity, landuse type, and soil pH were analyzed. The results showed that in this region, soil microbial quantity was decreased in the order of bacteria >actinomyces >fungi, and Songlinkou>Que’er Mountain>Zheduo Mountain. Forestland was richer in microbes than grassland, but the proportion of various microbes in forestland was lower than that in grassland. A significant positive correlation was observed between soil actinomycetes quantity and soil pH value, and between soil fungal quantity and soil total potassium content. .

Key words: Landscape fragmentation, Landscape dynamics, North Shannxi Loess Plateau

SHAO Baolin¹;GONG Guoshu¹;ZHANG Shirong²;YU Xia¹;YANG Danling¹, ZHANG Hong¹; LIU Xiaolu¹ . Soil microbial quantity and its relations with ecological factors in northern alp region of Hengduan Mountains[J]. cje.

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Soil microbial quantity and its relations with ecological factors in northern alp region of Hengduan Mountains

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