不同施水量对黄芩干物质积累与分配的影响

为研究施水量对黄芩的影响，确定适宜黄芩生长的水分条件，在黄芩生长季节模拟降水量设4种不同施水量处理，测定黄芩生长形态指标和各器官干物质重量，计算黄芩各器官干重占总生物量大小。结果表明，施水量多的处理和施水量少的处理根干重、地上千重、总生物量较低，施水量不足对黄芩地上部的影响大于对根部的影响；中度和轻度水分胁迫处理黄芩根重、地上重、总生物量较高；黄芩比较耐旱，年降水量在321～450mm，黄芩生长季节降水量在250～350mm，黄芩地上部与地下部生长协调，各器官物质分配合理，产量高。

Effects of Different Water Supply on Dry Matter Accumulation and Distribution of Scutellaria baicalensis

To study the effect of precipitation on Scutellaria baicalensis and define the suitable water condition for the growth of Scutellaria baicalensis. The water supply experiment was done for 4 treatments which simulate growing seasonal rainfall of Scutellaria baicalensis. Morphological indicators and dry matter weight of each organ were determined; and calculated the ratio of dry matter of each organ in total biomass of Scutellaria baicalensis. The results indicated that root dry weight, shoot dry weight and total biomass of Scutellaria baicalensis dealing with more and fewer amount of water were lower. Insufficient water supply had greater effects on shoot than on roots. Root dry weight, shoot dry weight and total biomass of Scutellaria baicalensis were higher under slight and moderate drought stress. Scutellaria baicalensis was better in drought resistance, The growth of shoot and roots was harmonious, matter distribution of each organ was reasonable and the output was high in the condition of 321 450 mm of the annual rainfall and 250-350 mm of seasonal rainfall.