全 文 ：Study on the Dynamic Relationship between Puccineuia
tenuiflom Biomass and Environmental Factors
in Degraded Grasslands
ZHANG Zhong-Heng ZHANG Chong-Bang
(Xechan N o d Cdkge , Heilongliong Rouinae , Keahan 161601 )
LI Jian-Dong
(Northeast Nonnd Uivashy, Changchun 130024)
Abstract In degraded grasslands, the p w t h of PlLccineUia tenugflora follows a seasonal variation
pattern, with a maximum biomass in August (98.4 g/m2). Among the eight environment factors
that directly and indirectly affect the p w t h of ALccinellia termajlora, hydrolyzable nitrogen , effec-
tive phoephoms, quick-acting potassium, pH ,water content and electric conductirity are the most
important.
Key words Degraded grasslands, Puccinellia te+ra biomass, Environmental factors
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