ScienceAsia 18 (1992): 217-224 |doi: 10.2306/scienceasia1513-1874.1992.18.217

SOME CHARACTERISTICS OF PLANTS GROWING AT THE SALT-AFFECTED AREA IN NORTHEAST THAILAND

PONGSIRI PATCHARAPREECHA^a, NAYANA PUENGPAN^b, TERDSAK SUBHASARAM^c, AND HIDENORI WADAD^d

ABSTRACT: Year round observations of both native and exotic plants at an experimental field revealed their strategies to flourish and survive inthe salt affected area in Northeast Thailand where rainy season and dryseason alternate in a year and where impermeable layers ( which arereduced in the rainy season) are present near the soil surface. Plants flourishing in the rainy season ("rainy season weeds") whichwere tolerant to strongly reductive state of the soil, were primarily annual plants. These plants were considered to be r-strategists. *Plants flourishing in the dry season ("dry season weeds") which were tolerant to high salinity and drought, were primarily perennial plants. These were regards a K-strategists,** though some of them could adopteither strategies depending on the conditions.

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a Department of Soil Science, Faculty of AgricultUre, Khon Kaen University, Khon Kaen 40002, Thailand.
b Department of Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand.
c Department of Land Development, Region V, Khon Kaen 40000, Thailand.
d Agricultural Development Research Center in Northeast Thailand, Thailand.

Received May 7, 1992