【摘要】 1998年 (丰水年 )和 1999年 (欠水年 )连续两年对皇川甫流域主要天然植被———百里香群落水分状况及土壤含水量的测定及分析结果表明 ,百里香蒸腾强度日变化曲线呈宽大的单峰型 ;在丰水年和欠水年 ,百里香蒸腾强度的季节动态大致相同 ,随土壤含水量和降雨量的增减而增减 ;土壤含水量是影响百里香蒸腾作用的主导因子 ;百里香群落地上生物量的增减与蒸腾耗水量增减呈同步 ,峰值出现在 7月份 ;无论在丰水年还是在欠水年 ,百里香群落土壤水分均得不到充足的降雨补给 ,造成土壤水分常年严重亏缺更多还原

【Abstract】 Based on the field montoring data in the growing season of 1998 (abundant precipitation) and 1999 (deficit precipitation), the water regime of Thymus serpyllum Grassland in Huangfuchuan Watershed was dealt with. The results was as follows: The daily change of transpiration intensity of T. serpyllum has one-peak and none-noon depression. In the abundant and the deficit precipitation, T. serpyllum has similar seasonal variation. The transpiration intensity of T. serpyllum increased with soil water content and precipitation increasing. The transpiration intensity of T. serpyllum is mainly affected by soil water content. The aboveground biomass and water consumption of T. serpyllum community have similar steps, reaching the highest values in July in two years.更多还原