乐都县柠条人工林生长状况分析

分析讨论了柠条人工林的造林技术及林木生长特点。研究表明:柠条人工林最理想的造林方式是水平阶或反坡梯田整地、鱼鳞坑整地,柠条根系密集层在地表40 cm以内,侧根旺盛,根幅增长快于冠幅增长,灌丛年均增高19.8 cm,增加分枝1-4枝/丛,生物量年增加0.19 kg.丛-1;适时平茬、复壮是促进柠条灌丛萌生分枝,增大冠幅,提高生长量和生物量的最有效途径。

Present Condition of Caragana microphylla Plantation in Ledu County

Forestation techniques and growth features of Caragana microphylla were analyzed.The results show that the optimal planting modes is site preparation of level bench or reverse-slope terrace or fish scale pit.The soil layer with dense roots of Caragana microphylla is in a layer of thickness of 40 cm.The lateral root grows vigorously.The root spread range increases higer than crown size.Shrub raises 19.8 cm annually.Ramification adds 1~4 branch·cluster-1.The biomass increases 0.19 kg·cluster-1.Timingly stumping and tending can accelerate germination and crown of shrub of Caragana microphylla.It also can increase growth and biomass of Caragana microphylla.