太行山草地建群种远东羊茅地上生物量动态的研究

 远东羊茅地上生物量在10.80—979.30gFW／m2或5.00—351.33gDW／m2之间变动，峰期值在902.87—1092.15gFW／m2或331.45—370.53gDW／m2之间变动。地上生物量的季节生长曲线呈单峰型，峰值期出现在7月份。地上生物量的增长与生长高度的增长和投影盖度的扩大呈正直线相关(R=0.8929和R=0.9066)。地上生物量和生长高度的最高生长速率出现于同期，而两者的相对生长速率最高值则出现在生物量峰值期之前。在生长季节期间，降雨量的多少是影响地上生物量变化的主要生态因子，两者的直线回归方程为y=6.2596+1.4089x(R=0.9250)。

THE DYNAMICS OF ABOVEGROUND BIOMASS OF FESTUCA EXTREMIORIENT ALIS IN THE TAIHANG MOUNTAIN GRASSLAND

The paper presented information of aboveground biomass dynamics of the Festuca extremiorientalis in the Taihang mountain grassland. The data indicate that the aboveground biomass was from 10.80 to 979.30gFW/m~2 or from 5.00 to 351.33gDW/m~2, The peak value of biomass varied was between 902.87 and 1092.15gFW/m~2 or between 33l.45 and 370.53gDW/m~2.The biomass growth shows a uninodal form. The biomass peak value appear in July. This feature is in accordance with the climate of Taihang mountain characteried by distinct cold and hot seasons, and the corresponding time of hot and raing seasons. The biomass and growth peak shows an obviously positive correlation] (R=0.8929). The biomass and coverage shows an positive correlation (R=0.9066). The highest growth rate of biomass and growth high appear at same time. The highest relative growth rate of both appear 30-50 days ahead of their peaks. In the growing season, precipitation was the main ecological factor of growth, and the regression equation of both shows y=6.2596+1.4089x (R=0.9250).