樟子松苗木持水量与造林成活率关系的研究

Relation between seedling water capacity and survival rate of Pinus sylvestris var. mongolica

通过5个晾晒时间的试验水平对樟子松苗木进行处理,研究失水过程以及不同失水量与造林成活率的关系。结果表明,未经晾晒处理的苗木,造林成活率为86.5%;而仅经过15 min晾晒,苗木的持水量只下降了5.6%,造林成活率就降到了43.8%,经过3 h晾晒的苗木,造林成活率只有2.1%。由此可见,苗木持水量的多少是苗木成活的关键因子。樟子松苗木在晾晒60 min之内失水较快,60 min以后失水变得缓慢。

The process of water loss of Pinus sylvestris var. mongolica seedling, the relationship between different water loss rate and the survival rate were studied in the trial treated by five - airing time level. The results show that survival rates of untreated seedlings was 86.5%, after aired 15 min it was 43.8%, while the water capacity only dropped 5.6 percent ; after 3 h airing it had survival rate of only 2.1%. Thus, seedlings water capacity is the key factor of seedling survival..The trial also indicated that the process of seedlings water loss is fast within 60 min, become slow after 60 min.