樟子松沙地种源试验

通过对2批樟子松不同种源试验林的调查分析得知，地理种源不同，樟子松的高生长、生长节律及适应性均存在着明显差异，树高生长差异大于胸径生长差异。不同种源物候期略有差别，纬度高的种源，物候期到来略早，纬度低的到来略迟，相差1～4d。一般人工林种源生长好于天然林种源，低纬度种源好于高纬度种源。经过十几年的种源试验表明，9007（净月潭）、9014（章古台）、9006（高峰）、9012（青山）号为最佳种源（产地）。

Provenances Test of Pinus sylvestris var.mongolica on Sand Land

Results of 2 sets of provenance test on Pinus sylvestris var.mongolica showed,there were significant differences among provenances in height increment and adaptability of Pinus sylvestris var.mongolica,differences in height growth are more obvious than diameter growth.There are 1-4 days differences in phenophase,and those from higher latitudes with earlier phenophase.Seeds from lower latitudes or artificial plantations gave faster growth than those from higher latitudes or natural stands.No.9007(Jingyuetan),No.9014(Zhanggutai),No.9006(Gaofeng) and No.9012(Qingshan) are best provenances(locations) based on about 20 years results.