湘南典型残次阔叶林人工促进更新技术研究  

The technique of artificial promote the typical defective broad-leaf forest natural regeneration

作　　者：郑雨超 

机构地区：[1]汝城县益将国有林场,湖南汝城424100

出　　处：《湖南林业科技》2016年第4期74-80,共7页Hunan Forestry Science & Technology

基　　金：国家林业科学数据平台(2015DKA32200)

摘　　要：于2003年在湖南省汝城县益将国有林场天然残次阔叶林内设置试验样地和对照样地各3个,采用林地清理、补植、补播等手段促进天然更新,并分别于2006年和2011年进行2次人工促进干预;同时,在6个样地内各设置3个样方,共计18个样方,分别于2003、2008、2013年冬,对幼树、幼苗、萌条的数量及地径进行统计,并对样方内胸径≥5 cm的立木进行每木调查。结果表明:种子补播保存率43%,幼苗补植保存率20%,平均保存率32%。树高≤30 cm且地径<0.5 cm、31 cm≤树高≤50 cm且0.5 cm<地径<0.7 cm幼树的数量下降率分别是对照样地的17.5%、21.59%,树高≥51 cm且地径>0.7 cm幼树的数量下降率是对照样地的121.66%。2008年单位面积蓄积量是对照样地的2.28倍,2013年达到3.80倍;经过10年更新,单位面积蓄积量是试验前的11.57倍,对照样地单位面积蓄积量仅是试验前的2.55倍;单位面积蓄积量是对照样地的4.54倍。人工促进天然更新所需的人工成本为1 860元/hm2,仅为同期人工营造杉木幼林所需人工成本5 310元/hm2的35%。Three experimental plots and three control plots were set in Yijiang State﹣owned Forest Farm of Rucheng Coun﹣ty in Hunan in 2003. Artificial promotion intervention were taken by the soil preparation,reseeding replanting and other measures to promote natural regeneration in 2006 and 201 1 restpectively. Three quadrats were set in each plot to investi﹣gate the sapling and total 18 quadrats,the seeding,stump plant and basal diameter were investigated in 2003,2008 and 2013,and investigate the each plant which over 5cm DBH . The result showed that,the seed survival rate was 43%, seedling planting survival rate was 20%and the average survival rates was 32%. Under artificial promotion,the decrease rates of seedling number were significantly lower than that of the control plots,it were around 17. 5% （H≤30 cm,D〈0. 5 cm）,21. 59% （31 cm0. 7 cm）respec﹣tively. The volume per unit area in experimental plots was 2. 28 times to the control plots in 2008,and 3. 80 times in 2013. The volume per area in experimental plots was 1 1. 57 times to that of 10 years before,and the volume per area in experimental plots that was 2. 55 times to the control plots after 10years. The volume per area in experimental plots was 4. 54 times to control plots of 10 years before,There is RMB 1 860 per hectare were expensed for artificial promoting measures,and the cost were only 35% of Cunninghamia lanceolata planting.

关 键 词：天然残次阔叶林 人工措施 促进更新 

分 类 号：S725[农业科学—林木遗传育种]