Plant diversity in paddy fields in relation to agricultural practices in Savannakhet Province, Laos |
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Authors: | Yasuyuki Kosaka Shinya Takeda Saysana Sithirajvongsa Khamleck Xaydala |
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Institution: | (1) Kyoto Prefectural University, Nakaragi, Shimogamo Sakyo-ku, Kyoto 606-8522, Japan;(2) Kansai Research Center, Forestry and Forest Products Research Institute, Kyoto, Japan;(3) Daizen Co, Okayama, Japan |
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Abstract: | This paper reports a study of paddy vegetation in central Laos. Plants were inventoried and vegetation types classified. Relationships
between vegetation and agricultural practices were identified. A total of 184 wild herbaceous species and 17 cultivated species
were recorded in two villages. Of the wild species, 19 were used by local people, four were rare species, and three were major
weeds. Paddy vegetation was arranged in order of water regime from shorter to longer hydroperiod by DCA. The factors contributing
to high species diversity were: (1) the presence of species unique to different paddy types; (2) the presence of remnant species
from original vegetation; and (3) the impact of agricultural practices. Thus, at this study site, multiple plant species coexisted
in paddy fields under various agricultural practices, and some species were essential sources of food or were used in other
ways to support the subsistence livelihoods of local residents. |
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Keywords: | |
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