马大杂种相思无性系造林早期生长调查  

Early Growth Investigation of Acacia Acacia Asexual Line Afforestation

作　　者：罗建华 曾少玲 容世清 梁庆华 Luo Jianhua;Zeng Shaoling;Rong Shiqing;Liang Qinghua(Forestry Institute of Zhanjiang City,Zhanjiang,Guangdong 524037)

机构地区：[1]湛江市林业科学研究所

出　　处：《热带林业》2019年第3期4-8,共5页Tropical Forestry

基　　金：广东省林业科技创新项目（2017KJCX055）：马大杂种相思高效培育关键技术研究与示范

摘　　要：通过对马大杂种相思无性系造林试验早期生长调查,结果表明:马大相思造林成活率较高,达98%;采用株行距为2.0m×3.0m的造林密度各项生长指标表现较好;从树高、冠幅、地径和干形4个生长指标数据来分析,1年生马大相思幼树无性系间生长存在个体差异,其中SK1和10#这2个无性系表现较好,不同生长期的树高、冠幅、地径和干形差异极显著,说明定植后植株的树高、冠幅、地径方面生长较快;马大相思与不同树种混交配置造林试验初步结论是,马大相思与桉树混交种植各项生长指标较接近,且能有效促进桉树生长,适合与桉树混交造林,其中以2:1的混交比例有利于树高和地径生长;马大相思与山杜英混交种植的各项生长指标差异巨大,不适合与山杜英混交造林;马大相思幼树的生长量是随着气温与降雨量增大而加快,其树高、地径与冠幅的生长高峰期出现于7月、8月、9月和10月,这4个月占全年生长量的70%左右,造林后可根据这变化规律加强抚育,能有效地提高林分的生长量。The early growth investigation of Acacia matha clone afforestation experiment was carried out.The results show that:The survival rate of Acacia mackerel afforestation is higher,reaching 98 %;The growth index of afforestation density with line spacing of 2.0 M×3.0 M performed well. From the data of tree height,crown width,ground diameter and dry shape,There is an individual difference in the growth of asexual lines in the one-year Acacia young tree,in which the two asexual lines SK1 and 10# perform better. There are significant differences in tree height,crown width,ground diameter and dry shape during different growth periods. The tree height,crown width and ground diameter of the plant after planting were relatively fast. The preliminary conclusion of the afforestation experiment between Acacia Mata and different tree species is that The growth indicators of the mixed planting of Acacia and eucalyptus are relatively close. And can effectively promote eucalyptus growth,suitable for mixed afforestation with eucalyptus,Among them,the 2:1 mixing ratio is conducive to tree height and ground diameter growth. The growth index of the mixed planting of Ma Daacacia and Elaeocarpus sylvestris is very different,and it is not suitable for mixed afforestation with Elaeocarpus sylvestris. The growth rate of Acacia pines increases with increasing temperature and rainfall. The peak growth of tree height, ground diameter and crown width occurred in July,August,September and October,which accounted for about 70% of the annual growth in these four months. After afforestation,it can be strengthened according to this change law,and can effectively increase the growth of the forest.

关 键 词：马大相思 无性系 造林试验 生长调查 

分 类 号：S725.3[农业科学—林木遗传育种]