CAJ | 학술논문

榆林沙区原有防风固沙林主要以落叶乔木、灌木、半灌木等植物类型为主,防风固沙效益低下.引进常绿针叶树种樟子松,进行低效防风固沙林更新改造,提高防护效益.通过造林试验认为,樟子松造林成效的高低,核心是造林地土壤有效水分含量的多少,水分条件好,造林成效就好,反之则差;不同植被类型造林地樟子松造林成活率不同,按植被类型排列高低次序为无植被覆盖裸沙地>沙柳林地>紫穗槐林地>杨树林地>柠条林地>花棒与踏郎林地>沙蒿林地;樟子松造林成活率随着造林地植被覆盖率的增大而降低;对于造林地植被生长发育期而言,幼林和过熟林地的樟子松造林成活率比成熟林地的高.
유림사구원유방풍고사림주요이락협교목、관목、반관목등식물류형위주,방풍고사효익저하.인진상록침협수충장자송,진행저효방풍고사림경신개조,제고방호효익.통과조림시험인위,장자송조림성효적고저,핵심시조임지토양유효수분함량적다소,수분조건호,조림성효취호,반지칙차;불동식피류형조임지장자송조림성활솔불동,안식피류형배렬고저차서위무식피복개라사지>사류임지>자수괴임지>양수임지>저조임지>화봉여답랑임지>사호임지;장자송조림성활솔수착조임지식피복개솔적증대이강저;대우조임지식피생장발육기이언,유림화과숙임지적장자송조림성활솔비성숙임지적고.
The present tree species in wind-breaking and sand-fixing forests in Yulin mainly are deciduous trees, shrubs, and half shrub, with low efficiency of wind-breaking and sand-fixing. Evergreen species Pinus sylvestris var.mongolica was introduced to transform the forests to promote protection effectiveness. Trial afforestation indicated that the key factor for the success of the introduction of conifer species was soil moisture. The survival rate of afforestation with P. sylvestris var.mongolica in different site conditions decreased with vegetation coverage, and was in the order of bare sand without vegetation cover> Salix woodland> Amorpha fruticosa woodland>Populus woodland>Caragana woodland>Hedysarum woodland>Artemisia woodland. In the view of vegetation growing development period, the survival rates of afforestation in young and over-matured stands were higher than that in mature stand.