油松种源局部分布区试验

Experiment on Pinus tabulae fonmis in provenance limited range

油松种源局部分布区试验结果表明,种源间生长量的差异仍达到极显著的水平,其变异幅度不如全分布区的大,但表现速生的种源与全分布区试验基本一致。综合3次试验得出,秦岭、伏牛山地区以及陕北的桥山、黄龙山一带是甘肃油松造林的优良种源区。今后我省大多数地区油松用种应以南部型和中西型中的商县、洛南、太白、南召、卢氏、广元、黄陵和黄龙等种源为主要对象,禁止调用分布边缘地区的油松种子。

The result of limited range provenance trial of Pinus tabulae fonmis Shows that growth difference between provenances is extremely significant.The variation extent is less than that in wide range provenances.But there is nearly identical result in both limited range and wide range provenance for fast growing provenances.All three trials conclude that excellent provenances for afforestation in Gansu distribute in Funiu shan in Qinling moun- tains,Qiaoshan and Huanglong shah in Northern shanxi.The seed used in most of regions in Gansu should be Raruested from such southern and middle-western provenances as shang Xian,Luonan.Taibai.Nanzhao,Lusi,Guangyuan.Huanglin and Huanglong counties.The seed from marginal distribution areas should be avoided to use.