内蒙古奈曼旗兴隆沼林场针叶树引种造林试验

内蒙古奈曼旗兴隆沼林场在１９９２年引种长白松、斑克松和小干松，以樟子松作为对照，营造试验林。到１９９９年已经基本稳定，而且生长量除小干松以外都接近于樟子松，白松树高为樟子松的１１２．５％，胸径为８８．６％，斑克松树高和胸和戏分别为樟子松的８７．５％和５４．３％，小干松树高为樟子松的２９．２％，试验认为，长白松和斑克松可以扩大造林，小干松虽然保存率比较低，生长比较缓慢，但是也已经稳定下来，应该继续进

Experiments on Afforestation by Introduction Coniferous Trees in Xinglongzhao Forest Farm, Naiman Banner, Inner Mongolia

P.sylvestris var. sylvestriformis, P.banksiana, P. contorta have been introduced in Xinglongzhao forest farm in Naiman Banner. Constructed by P.sylvestris var. mongolica, experimental forests have been planted and already stable till 1999. Their growth has been close to P. sylvestris var. mongolica except P.contorta. The tree height and chest height diameters of P.sylvestris var. sylvestriformis are separately 112.5 percent and 88.6 percent of the ones of P.sylvestris var. mongolica. The tree height and chest height diameters of P.banksiana are 87.5 percent and 54.5percent. The tree height of P.contorta is 29.2 percent of the one of P.sylvestris var. mongolica. Through the experiments, P.sylvestris var. sylvestriformis and P.banksiana can be widely planted. And the rate of preservation for P.contorta should be continued to conduct experiment observation.