伏山林场柏木母树林子代造林试验初探

以伏山林场柏木母树林为材料,以荆门市、十堰市郧西县、十堰市郧阳区当地普通林分种子及育成的苗木为对照,测定其种子及1 a生苗木特性,并在鄂西北进行区域试验,调查造林15 a后试验林保存率、树高、胸径等指标,并计算材积及现实增益。结果表明:伏山林场柏木母树林种子千粒重为3.31 g,发芽率为66.00%;1 a生苗木平均苗高为32.10 cm,平均地径为0.41 cm。在三个试验点造林15 a后,伏山林场柏木母树林子代保存率在98%以上,其树高、胸径、材积等均高于对照,树高的现实增益分别为8.97%、9.23%、9.94%;胸径的现实增益分别为11.06%、12.06%、13.78%;材积的现实增益分别为30.00%、31.70%、38.10%,表现出良好的速生性及适应性。

Afforestation Experiment with Parent Stand Seeds of Cypress inFushan Forest Farm

The regional test was made with parent stand of cypress in Fushan ForestFarm as material,the seeds and seedlings of local ordinary stand from Jingmen, Yunxi county and the Yunyang District of Shiyan as control .Characteristics of seeds,one year old seedlings and conservation rate, diameter, height, timber volume and practical gain after regional afforestation experiment in the northwest Hubei province for fifteen years were studied. The study showed that the thousand-seed weight was 3.31g,the germination rate was 66%.The average plant height and ground diameter of one-year seedlings were 32.10,0.41cm respectively.The conservation rates of 15-year-old experimental forest in the three experimental sites were all over 98.00%,the height,diameter,timber volume of which were higher than control. The practical gain of height were 8.97%,9.23%,9.94% respectively, the practical gain of the diameter were 11.06%,12.06%,13.78% respectively and the practical gain of timber volume were 30.00%,31.70%,38.10% respectively.