早期在杉木伴生下的闽楠人工林生长规律研究

对早期在杉木伴生下的28年生的闽楠人工林生长规律进行了研究,结果表明:早期以杉木为伴生树种的闽楠人工林,无论是树高、胸径、材积生长都明显高于闽楠纯林,28年生时平均木的单株材积达到0.24628 m3,比闽楠纯林增加100.9%。其胸径连年生长量最大值出现在8~10年生时,峰值为1.02 cm.a-1,连年生长量在0.8 cm.a-1以上的年份有14a;树高连年生长量在10~12年生时最大,峰值为1.07 m.a-1,4~16年生时生长量都保持在0.8 m.a-1以上。闽楠纯林树高总生长量只有15.89 m,连年生长量在8~10年生时最大,峰值为0.95 m.a-1,比以杉木为伴生树种的闽楠要小。

Growth Law of Phoebe bournei Plantation with Cunninghamia lanceolata Association at Early Stage

This paper studied the growth law of 28-year-old Phoebe bournei with Cunninghamia lanceolata association at early stage, the results showed height,dbh,volume growth of Phoebe bournei with Cunninghamia lanceolata association at early stage were higher than those of Phoebe bournei pure forest,the 28-year-old single-tree volume reached 0.24628m3,100.9% higher than the pure forest.The top volume of dbh current annual growth occurred in 8～10a,There were 14a with peak value of 1.02cm/a and current annual growth of over 0.8cm/a;height current annual growth top value occurred when it was 10～12 years old.The peak value was 1.07cm/a,the growth kept for over 0.8m/a when it was 4～16 years old.Phoebe bournei height total growth was 15.89 m,reached the top when current annual growth was 8～10a,the peak value reached 0.95m/a,smaller than that of Phoebe bournei with Cunninghamia lanceolata association.