防火林带营造木荷火力楠混交林生长效果分析

对马尾松低产林改造,营造防火林带木荷火力楠生长效果进行了调查,发现林木生长良好。结果显示：经过14a的培育,其林木生长不同,木荷火力楠混交林的林分生长量,比木荷、火力楠纯林的林分生长量更具优势,平均树高、胸径、树冠、枝下高、郁闭度、单株材积、蓄积量,分别比木荷、火力楠纯林林分平均树高大13.54%、8.55%,胸径粗18.39%、14.21%,树冠大8.24%、22.26%,枝下高8.75%、17.67%,郁闭度大2.13%、3.23%,单株材积大45.43%、41.18%,蓄积量大54.95%、37.54%。土壤肥力N、P、K分别提高0.9%、1.92%、1.79%,1.80%、6.00%、3.64%。木荷火力楠混交林能涵养水源、保持水土,有效控制林火蔓延,可减少森林火灾和灾后损失。

Growth Effect Analysis of Schima Superba and Michelia Macclurei Mixed Forest in Firebreak Forest Belts

This study investigates the growth effects of a mixed forest with Schima superba and Michelia macclurei created in a firebreak forest belt which has transformed the low--yield purre forest of masson pine and the results show the trees grow well. After 14 a cultivation, the growth of the mixed forest stands is better than that of Schima superba pure forest and that of Michelia macclurei pure forest. Compared with the above two pure forest, the average tree height, DBH, crown diameter, under branch height, canopy density, single tree volume and stand volume are increased respectively by 13.54% ＆8.55%, 18.39% ＆ 14.21%, 8.24% ＆ 22.26%, 8.75% ＆ 17.67%, 2.13% ＆ 3.23%, 45.43% ＆ 41.18%, 54.95% ＆ 37.54%. The fertility of soil N, P, K are increased by0.9% ＆ 1. 92%, 1.79% ＆ 1.80%, 60% ＆3.64%. Therefore, it is proved that the mixed forest with Schima superba and Michelia macclurei can preserve water and soil, effectively control forest fire spread, and reduce the loss of forest fire and disaster.