不同种源小干松苗期生长特性

目的]选育出适合辽宁地区生长的优良小干松种源。方法]以从加拿大引进的10个小干松种源为研究对象,对不同种源3年生苗木的苗高和地径进行测定和分析,同时对不同育苗方式进行了评价。结果]在不同种源小干松温室容器育苗中,3年生苗高平均为0.30 m,苗高最大的是6号种源(0.34 m);地径平均为0.81 cm,地径最大的是2号种源(0.89 cm)。在不同种源小干松露地育苗中,3年生苗高平均为0.34 m,苗高最大的是2号种源(0.52 m);地径平均为1.07 cm,地径最大的是1号种源(1.27 cm)。不同育苗方式比较表明,小干松温室容器育苗在苗高和地径方面均差于露地育苗。结论]根据苗高和地径的结果,初步筛选出1号、2号和6号种源为优良种源。

The Growth Characteristics of Different Provenances of Pinus contorta at Seedling Period

Objective] The aim was to screen out excellent Pinus contorta provenance, which is suitable for cultivating in Liaoning Region. Method] With 10 Pinus contorta provenance introduced from Canada as study object, seedling height and ground diameter of 3 years old seedlings were determined and analyzed, different seedling raising methods were evaluated. Result] In greenhouse, the average seedling height was 0. 03 m, the maximum was No. 6 provenance (0. 34 m);the average ground diameter was 0. 81 cm, the maximum was No. 2 prov-enance(0. 89 m). In open ground, the average seedling height was 0. 34 m, the maximum was N0. 2 provenance(0. 52 m); the average ground diameter was 1. 07 cm, the maximum was No. 1 provenance(1. 27 cm). Comparison of different seedling raising methods showed that greenhouse was inferior to open ground in seedling height and ground diameter. Conclusion] According to seedling height and ground diame-ter, No. 1, No. 2 and No. 6 was selected as excellent provenance.