水分胁迫对大叶相思苗木生长及生物量的影响及评价

The Effect and Evaluation of Water Stress on the Growth and Biomass of Acacia auriculiformis' Seedling

对大叶相思苗木进行4个水分胁迫强度,4个水分胁迫循环周期的试验,研究其对大叶相思苗木的生长及生物量的影响.结果表明:不同水分胁迫强度和次数对大叶相思苗木生长、生物量及其分配的影响显著;大叶相思苗木在水分胁迫下生长受到抑制,根占总生物量的比例随水分胁迫梯度和次数的加大而增加;在不同的水分胁迫下,以间隔7 d浇水的处理为最佳的水分胁迫梯度,第二循环周期为最适胁迫周期.

The effects of waters stress on the growth and biomass of seedlings of Acacia auriculiformis were studied through the experiments of four different water stresses and four cycles respectively. The results showed that the effect of water stress on growth and biomass of Acacia auriculiformis seedling was remarkable, but the growth was restrained, the proportion of root to the biomass increased with the rising frequency and gradient of the stress. As a conclusion, 7-day interval watering was the best water stress and second cycle period was the most suitable coercive cycle.