西北林学院学报2024，Vol.39Issue(5)：159-167,9.DOI:10.3969/j.issn.1001-7461.2024.05.20
石漠化地区生态经济树种马桑的萌条生长特性研究
Sprout Growth Characteristics of Eco-economic Tree Species Coriaria nepalensis in Rocky Desertification Area
摘要
Abstract
To examine the growth dynamics and inter-sprout competitive interactions of Coriaria nepalensis in the karstic regions affected by rocky desertification in Southwestern China,and to advance the efforts in combating desertification and promoting ecological restoration,an intricate afforestation trial using C.ne-palensis cuttings was conducted in a karst landscape experiencing mild desertification.This initiative led to a subsequent evaluation of selected C.nepalensis sprouds following a natural growth period of two years.The results indicated that 1)at the individual tree level,both the radial and vertical growth patterns of young trees closely resembled the normal distribution observed in homogeneously aged forests.In contrast,the growth arrangement at the sprout level was significantly akin to an irregular,montane distribution pat-tern,a typical pattern of uneven aged forests.A noteworthy linear correlation was established between ra-dial and vertical growth across these dimensions,indicating a consistent growth pattern.2)There was a significant 1.6-fold increase in the number of two-year-old sprouts compared to their one-year-old counter-parts,along with a notable 10.3° reduction in the angular orientation of the older sprouts.This highlighted the significant influence of age on the growth characteristics of sprouts.3)A pronounced relationship was identified between the health of the sprouts and their observable traits.Healthy sprouts were characterized by a broader angular distribution,a thicker base diameter,greater height,and a larger number of secondary branches,contrasting sharply with the features of withered or deceased sprouts.4)The study also illumi-nated the pronounced effects of intra-sprout density within C.nepalensis populations.Two-year-old sprouts were more numerous but exhibited a thinner and shorter stature with a flattened shape,unlike the one-year-old sprouts,which were fewer but thicker,taller,and demonstrated a more compact form.In sum-mary,the findings underscore a significant diversification in the growth patterns of C.nepalensis plants and sprouts with each successive year under mild rocky desertification conditions,suggesting a crucial evolu-tionary transition from r-selection to k-selection growth strategies.Given the growth tendencies of C.ne-palensis,the implementation of strategic interventions such as artificial thinning and pruning is recommen-ded to reinforce targeted cultivation endeavors.This approach aims at optimizing the ecological and eco-nomic benefits derived from C.nepalensis,thereby contributing to sustainable management practices in e-cosystems prone to desertification.关键词
马桑/萌条/生长/生态经济/石漠化Key words
Coriaria nepalensis/sprout/growth/eco-economic/rocky desertification分类
农业科技引用本文复制引用
肖玖军,陈阳,邢丹,李可相,张蓝月,谢刚..石漠化地区生态经济树种马桑的萌条生长特性研究[J].西北林学院学报,2024,39(5):159-167,9.基金项目
国家自然科学基金(32060377) （32060377）
贵州省林业科研课题[黔林科合(2017)08号] （2017）
贵州省科技支撑计划项目[黔科合支撑(2023)一般048号] （2023）
贵州省基础研究计划项目[黔科合基础-ZK(2022)一般276号] （2022）
