不同地理种源马尾松造林试验

马尾松不同种源、不同密度、不同整地规格造林试验表明，马尾松不同种源生长差异显著，容县松、上思松、尤溪松三者之间幼林生长表现最好的是容县松，其次是上思松，造林3年后容县松树高、胸径分别达到3．07m、3．51cm，比尤溪松树高、胸径生长分别增加了15．0％、25．8％，单株总生物量、地上部生物量、地下部生物量分别增加了32．5％、31．1％、40．4％；造林2年的宁明松和尤溪松相比，宁明松生长明显优于尤溪松，树高生长增加了16．4％，胸径生长增加了10．1％，单株总生物量、地上部生物量、地下部生物量分别增加了43．4％、40．2％、60．7％；马尾松虽然耐瘠薄，但立地条件的好坏对林分生长影响比较明显，高标准、高质量的马尾松林分需要立地条件的保证；造林密度和整地规格对马尾松幼林生长无显著影响，考虑到生产实际，马尾松造林株行距可采用2．0m×2．0m，马尾松容器苗造林整地规格可以适当降低，穴的规格可以采用25cn×20cn×20cn中穴造林或15cn×15cn×10cm的小穴造林。

Forestation Experiment of Pinus massoniana with Different Geographical Provenance

The forestation experiments of Pinus massoniana with different geographical provenance in different density and various specifications of soil preparation were studied.Results show that growth differences of Pinus massoniana with different geographical provenance are distinct.The growth performance of Rongxian pine is the best of the three species(Rongxian pine,Shangsi pine and Youxi pine),and the second is Shangsi pine.After afforested for 3 years,the height and DBH of Rongxian pine is 3.07 m and 3.51 cm respectively,compared with the Youxi pine,the height increases by 15.0%,the DBH increases by 25.8%,the total biomass,overground biomass and root biomass increases by 32.5%,31.1% and 40.4% respectively.Afforested 2 years later,the growth of Ningming pine is faster than the Youxi pine,compared with the Youxi pine,the height increases by 16.4%,the DBH increases by 10.1%,the total biomass,overground biomass and root biomass increases by 43.4%,40.2% and 60.7% respectively.However,the Pinus massoniana have the strong tolerance to poor soil,but the site condition is necessary to the high quality plantation.There are no significant effect of the planting density and specifications of soil preparation on the young plantation of Pinus massoniana.With a view to the practicality,the 2.0 m×2.0 m of the plant and row spacing arrangement and 25 cm×20 cm×20 cm or 15 cm×15 cm×10 cm of the hole standard can be used in the plantation.