人工针阔混交林生物多样性功能分析

Functions of Biodiversity of Artificial Broadleaved-Coniferous Mixed Forest

通过对红松、刺楸人工针阔混交林和红松人工纯林生物多样性功能的试验分析,结果表明针阔混交林能增加蚯蚓的数量,林龄25年时,混交林的蚯蚓数量比人工纯林高48.4%;人工针阔混交林招引各种鸟类达33种,每天食虫量达1500条,抑制了森林虫害的发生;人工针阔混交林日平均气温0.5m 和1.8m 处分别比红松纯林低2.4-1.0℃,相对湿度0.5m 处比红松纯林提高24%,绝对湿度提高2.3%,1.8m 处混交林相对湿度比纯林提高11%,绝对湿度比纯林提高5.2%;混交林比纯林能降低风速0.7-1.2m s^-1.针阔混交林的各项功能指标都优于纯林.

The functions of the biodiversity of the artificial pure forest for Pinus koraiensis and the artificial broad-leaved-coniferous mixed forest of Pinus koraiensis and Kalopanax septemlobus were analyzed.Result shows that:broadleaved-coniferous mixed forest can increase the number of earthworms;the numbers of earthworm in the mixed forest are 48.4% higher than that of the artificial forests while the forest age being 25 years;the broadleaved-conif-erous mixed forest can attract 33 kinds of birds,and the insectivorous number are 1 500 per day,which inhibit the occurrence of forest pests;the daily average temperature of the broadleaved-coniferous mixed forest at 0.5 m and 1.8 m is 2.4 ℃ and 1.0℃ respectively lower than that of the pure forest of Pinuskoraiensis;the relative humidity and the absolute humidity is 24% and 2.3% higher than that of the pure forest at the height of 0.5 m respectively;the relative humidity and the absolute humidity is 1 1% and 5 .2% higher than that of the pure forest at the height of 1.8 m respectively;the mixed forest can reduce the wind speed by 0.7-1.2 m s-1 than that of the pure forest.The func-tion indicators of the broadleaved-coniferous mixed forest are superior to that of the pure forest.