【摘要】 通过对桢楠、浙江楠的4年生和5年生的纯林和混交林的生长情况分别进行调查,研究了不同造林模式下桢楠与浙江楠的树高、胸径、材积、冠幅、叶绿素含量(SPAD值)、枝下高、侧枝轮数、分枝角和最粗侧枝直径等主要生长因子的差异,为桢楠与浙江楠的科学造林提供理论依据.结果表明:对于4年生林分,采用混交模式对浙江楠的树高、胸径、材积、叶绿素含量(SPAD值)、侧枝轮数和分枝角均有促进作用.对于5年生林分,桢楠和浙江楠以泡桐为混交树种时,其树高、胸径、材积、冠幅、枝下高和分枝角均优于以杉木为混交树种,以湿地松为混交树种时生长最差.在相同混交模式下,桢楠的树高、侧枝轮数、分枝角均优于浙江楠,而浙江楠的胸径、冠幅、枝下高和最粗侧枝直径显著优于桢楠.因此,对于4年生林分,混交造林模式更适合浙江楠的生长.对于5年生林分,泡桐最适合与桢楠和浙江楠混交,湿地松混交的效果最差,杉木介于二者之间.相同混交模式下,浙江楠的长势略优于桢楠,但差异不明显.更多还原

【Abstract】 The study investigated the growth of 4-year-old and 5-year-old pure forest and mixed forest of Phoebe zhennan and P.chekiangensis C.B.shang respectively, and analyzed the differences of tree height, diameter at breast height(DBH),volume of wood, crown breadth, chlorophyll content(SPAD value),under branch height, number of lateral branch rings, branch angle and diameter of the thickest lateral branch between Phoebe zhennan and P.chekiangensis C.B.shang to provide theoretical basis for scientific afforestation of them.The results showed that for the 4-year-old stands, the mixed mode significantly promoted the growth of height, DBH and volume of wood of P.chekiangensis,coupled with increased SPAD value, lateral branch number and branch angle.For 5-year-old stands, the height, DBH,volume of wood, crown breadth, under branch height and branch angle of P.Zhennan and P.chekiangensis mixed with Paulownia fortunei were both better than those of mixed with Cunninghamia lanceolata,and Pinus elliottii was the worst mixed tree species.Under the same mixed mode, the tree height, number of lateral branch rings and branch angle of P.zhennan were better than those of P.chekiangensis,while the DBH,crown breadth, under branch height and the diameter of the thickest lateral branch of P.chekiangensis were significantly better than those of P.Zhennan.Therefore, for 4-year-old stands, mixed afforestation mode is more suitable for the growth of P.chekiangensis C.B.shang.For 5-year-old stands, P.Fortunei was the most suitable associated tree species with P.Zhennan and P.chekiangensis,P.elliottii was the worst, and C.lanceolata was between them.Under the same mixed mode, the growth of P.chekiangensis was slightly better than that of P.Zhennan,but the difference was not significant.更多还原