[Effects of soil factors on vegetation community structure in an abandoned subtropical paddy wetland].
Based on the investigation data from a subtropical wetland having been abandoned from paddy agriculture for one year, a redundancy analysis was conducted on the relationships between vegetation community and soil factors in the wetland. It was found that soil moisture regime, available K and P, and pH were the main factors affecting the distribution of plant species. The common plant species could be classified into three groups, i. e., Ludwigia prostrata - Murdannia triquetra group (G1), Hemarthria altissima - Rotala rotundifolia - Lapsana apogonoides group (G2), and Conyza canadensis - Polygonum hydropiper - Paspalum pasaloides group (G3). G1 mainly distributed on the soils with higher available K, G2 mainly distributed in periodically flooded area, while G3 mainly distributed in drainage area and was positively correlated to soil available P and pH. Species diversity and above-ground biomass had significant positive correlations with soil pH and total K, respectively, while evenness index was significantly negatively correlated with soil available N. No significant correlations were observed among other indices.
Peng
Yi
Y
Taoyuan Agro-ecological Experimental Station, Institute of Subtropical Agroecology, Chinese Academy of Sciences, Changsha 410125, China. pengyi_101@163.com
Li
Yu-Yuan
YY
Li
Zhong-Wu
ZW
Ye
Fang-Yi
FY
Pan
Chun-Xiang
CX
Xie
Xiao-Li
XL
D002681:China; D017753:Ecosystem; D006863:Hydrogen-Ion Concentration; D012275:Oryza / Q000254:growth & development*; D010758:Phosphorus / Q000032:analysis; D063245:Plant Development; D010944:Plants / Q000145:classification*; D011157:Population Dynamics; D011188:Potassium / Q000032:analysis; D012987:Soil / Q000032:analysis*; D014329:Tropical Climate; D014867:Water / Q000032:analysis; D053833:Wetlands
D012987:Soil; D014867:Water; D010758:Phosphorus; D011188:Potassium