马尾松人工林生长规律及混交模式研究

Study on Growth Law and Mixed Mode of Pinus massoniana Plantation

对33年生马尾松人工纯林进行树干解析,结果表明:在整个生长过程中,树高连年生长量最大值出现在10年,平均生长量最大值出现在10-15年,第一次间伐年龄应在15年左右,20-25年时,树高连年生长量急剧下降,第二次间伐年龄可适当提前到22年;直径连年生长量最大值出现在10年,连年生长量与平均生长量在20-25年时相交;材积连年生长量在30年生时达到最大值,数量成熟年龄大约在55年生左右;33年生马尾松人工林整个生长发育可划分3个时期:第一时期0-10年生为幼林期;第二时期10-20年生为速生期;第三时期20-33年生为壮龄期。马尾松+火力楠和马尾松+杉木两个混交类型混交效果较好,目的树种马尾松平均树高分别达到3.74 m和3.73 m,平均胸径分别达到4.01 cm和3.89 cm,树高分别比对照纯林提高12%和11.7%,胸径分别比纯林提高17.5%和11.5%。

The stem analyses were conducted on 33-year-old Pinus massoniana . Tile results show that the current annual height growth appears tile maximum value at the age of 10. The greatest mean growth appears at the age of 10 - 15 and the first cutting age is about 15. The greatest current annual height growth decrease during the age of 20 -25 and the second cutting age is 22. The greatest current annual diameter growth appears at the age of 10, the current annual height growth and average growth meet at the age of 20 ~ 25. The greatest current annual volume growth appears at the age of 30, the quantitative maturity age is about 55. The growth and development of 33-year-old Pinus massoniana can be divided into 3 stages, the first stage is the young forest one at the age of 0 ~ 10,the second stage is the fast-growing one at the age of 10 ~ 20 and the third stage is the the mature one at the age of 20 - 33. The effect of mixed forests of Pinus massoniana and Mangietigla glaula blu~, and Pinus massoniana and Cunninghamia lanceola is better, the average height of the Pinus massoniana reached 3.74 m and 3.73 m, the average of diameter reaches 4.01 cm and 3.89 cm. Compared with pure forest , the height increases 12% and 11.7% ,the diameter increases 17.5% and 11.5% respectively.