杉松的生长和材质研究

杉松是新发现的黄山松的一个变种,它的生长速度中等,树干通直而圆满,除抗劈强度及抗压强度略低于黄山松和马尾松外,其它均高于这两个树种。木材主要用作建筑、枕木、坑木、柱材、桶材、箱盒及家具。此外,尚可用作造船材、车辆用材、胶合板及木桨。

A STUDY ON THE INCREMENTS AND QUALITIES OF THE FIR PINE

Fir pine (Pinus hwangshanensis Hsia var. wulingensis S.C.Li) wasdiscovered by Prof.Ke Binfan et al. in the Southwestern Wuling-Xin of JiangxiProvince in 1979. Its scientific name is given by Prof.Li Shuchun. Fir pine dihers from hwangshan pine in morpholgical features and woodstructure. The bark of fir pine is thinner than that of hwangshan pine; itscolor is light brown to reddish brown, and that of hwangshan pine is deepgray-brown to brown; The needle-leaf of fir pine is longer than that of hwa-ngshan pine. The degree of dentations found in the area of the last-formedlatewood or the first-formed earlywood tracheids of fir pine is shallow, rarelyto heavy dentate with seldom reticulates, whereas those in hwangshan pine isheavy dentate with a few reticulates. Fir pine is a moderately rapid-growing tree during the first 50 to 100years of Its life. Its height growth is continously upwards. The diameter growthis slow during the first 10 years of its life and after this period, rapid. As tothe quantity increment, both current increment and mean Increment are notdecreasing up to 60 years old, as shown in Figure 1. It is seen from table 3 that most strength values given for comparison,are higher than those of pinus hwangshanensis and P.massoniana except clavageresistance and compressive strength, which are slightly lower. Fir pine ordinarily upright and full-rounded cylindrical safts that are clear forhalf to two-thirds of their lengtho Its wood generally straight and even-grained,medium to somewhat coarse-textured. Therefore, the major uses of this wood areutilized in building construction, crossties, columns,mine timbers, slack andtight cooperage, box and crates, and furniture. Moreover, the wood should beused for ship-building, car-construction, plywood and wood pulp.