不同砂土类型对意大利石松种子萌发和幼苗出苗的影响

以意大利石松种子为试验材料，测定其在大沙、河沙和绵沙3种不同砂土条件下的萌发率、出苗率、保苗率、株高、主根长度、幼苗干重和鲜重，探索意大利石松出苗适宜的砂土类型。结果表明：（1）意大利石松种子在大沙、河沙和绵沙3种砂土中的平均萌发率分别是58%、83%、75%。（2）3种砂土下的平均出苗率和保苗率分别是57%、75%、39%和52%、68%、28%。（3）3种砂土下的平均株高和主根长度分别为9.0、10.4、9.3 cm和16.0、27.7、16.5 cm。（4）3种砂土下每株幼苗的平均干重和鲜重分别是0.48、0.69、0.58 g和1.79、2.38、1.99 g。研究结果表明：最适宜意大利石松生长的砂土类型为河沙，萌发率为83%，出苗率为75%，保苗率为68%，株高和主根长度为10.4 cm和27.7 cm，鲜重及干重为2.38 g和0.69 g。

Effects of Different Types of Sands on Seed Germination and Seedling Growth of Pinus pinea L.

A container experiment was conducted to investigate the effects of germination and seedling growth characteristics of Pinus pinea L. seeds under different types of sandy soil conditions. The results indicated that: (1) the average germination rates under 3 kinds of sandy soil (sand, river sand and soft sand) were 58%, 83% and 75%, respectively; (2) the average germination rates under 3 kinds of sandy soil were 57%, 75% and 39%, respectively, and the average survival rates were 52%, 68% and 28%, respectively; (3) the average plant heights were 9.0, 10.4 and 9.3 cm, and the average root lengths were 16.0, 27.7 and 16.5 cm; (4) per seedling average fresh weights were 0.48, 0.69 and 0.58 g, and dry weights were 1.79, 2.38 and 1.99 g. The results showed that: the most suitable type of Pinus pinea L. planting soil was river sand, under which, the germination rate was 83%, survival rate was 68%, fresh weight and dry weight were 2.38 g and 0.69 g, respectively.