[1]李亚,李菁菁,苏万红*,等. 河西走廊东端猫头刺种群结构与数量动态[J].西北林学院学报,2023,38(4):250-258.[doi:10.3969/j.issn.1001-7461.2023.04.31]
　LI Ya,LI Jing-jing,SU Wan-hong*,et al. Quantitative Dynamics and Population Structure of Oxytropis aciphylla at the East End of Hexi Corridor[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2023,38(4):250-258.[doi:10.3969/j.issn.1001-7461.2023.04.31]
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 河西走廊东端猫头刺种群结构与数量动态()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第38卷
期数:
2023年第4期
页码:
250-258
栏目:
出版日期:
2023-07-31

文章信息/Info

Title:
 Quantitative Dynamics and Population Structure of Oxytropis aciphylla at the East End of Hexi Corridor
文章编号:
1001-7461(2023)04-0250-09
作者:
 李亚1; 李菁菁1; 苏万红2*; 胡小柯1; 丁峰1
 （1.甘肃省治沙研究所/甘肃省荒漠化与风沙灾害防治重点实验室 省部共建国家重点实验室培育基地，甘肃 兰州 730070；2.甘肃省景泰县林业局，甘肃 景泰 734000）
Author(s):
 LI Ya1; LI Jing-jing1; SU Wan-hong2*; HU Xiao-ke1; DING Feng1
 (1.Gansu Desert Control Research Institute/Gansu Desert Control Research Institute,National Key Laboratory Breeding Base of Wind and Sand Disaster Combating,Lanzhou 730070,Gansu,China; 2.Jingtai County Forestry Bureau,Jingtai 734000,Gansu,China)
关键词:
 ; 猫头刺; 年龄结构; 生命表; 存活曲线; 数量动态
Keywords:
Oxytropis aciphylla;  age structure;  static life table;  survival curve;  quantitative dynamics
分类号:
Q948.121
DOI:
10.3969/j.issn.1001-7461.2023.04.31
文献标志码:
A
摘要:
 猫头刺是河西走廊东端重要的固沙植物，以河西走廊东端景泰县大咀子滩和白墩子滩猫头刺天然种群为研究对象，采用空间代替时间的方法，分析其龄级结构、平均密度及变化、平均冠幅、静态生命表、存活曲线等，掌握了猫头刺种群的结构及数量动态。结果表明，1）大咀子滩长势较好的种群更新状况好，为增长型，但低龄级植株的存活处于严重限制状态；大咀子滩长势一般、长势差及白墩子滩种群均为衰退型，尤其是长势差的种群，更新已基本停止，大龄级植株多数已死亡，种群面临消失。2）总体年龄结构相对完整，呈正态分布，幼苗数量少，年龄中等偏小，龄级主要在2~6级；平均密度4级之后明显下降，平均冠幅7~8级出现最高峰，8~9级是高生长的旺盛期；存活曲线呈Deevey-Ⅲ型“凹”曲线，龄级与相对年龄存活数之间为显著线性关系；对环境变化敏感，尤其是长势差种群；总体呈衰退趋势。3）导致河西走廊东端猫头刺种群更新状况差的主要原因，除结实率、萌发率低之外，外界环境的改变也是一个方面，即立地条件由流动沙地向固定沙地转变，流沙减少，猫头刺植株尤其是幼苗得不到沙埋，进而存活率低，死亡严重。因此，需采取措施对研究区猫头刺种群，尤其是长势差种群制定切实可行的保护、恢复策略。
Abstract:
Oxytropis aciphylla is an important sand fixation plant at the east end of Hexi Corridor.In this paper,The O.aciphylla populations occurring in two regions at the east end of Hexi Corridor were taken as the study objects,including Dazuizitan and Baidunzitan of Jingtai County,Gansu Province.The quantitative dynamics and population structure of O.aciphylla populations in the region were investigated by using space for time substitution method.The age structure,average density and variation trend,average crown,static life table,survival curve were analyzed based on field investigation.The results indicated that 1) the well growing population presented good regeneration situation in Dazuizitan area,belonging to growth type,however,the growth of young plants was seriously inhibited.General and poor growing populations in two regions belonged to declining type.Especially for the poor growing populations,the regeneration almost stopped,manifested by the facts that the old age plants had died,the population was facing the danger of distinction.2) The general age structure of O.aciphylla population was relatively complete,showed a normal distribution,the quantity of seedlings was little,the age was moderately small,the age class was mainly in the levels of 2-6.The average density decreased significantly at the age level of 4,the average crown appeared high peak at the age levels of 7-8,the growing peak period of height was in 8-9 age levels.The survival curve was classified as Deevey-Ⅲ (convex) type,there was significant linear relationship between age class and relative age survival quantity.The stability of population was sensitive for the change of environment,especially in poor growing population,which exhibited a degradative tendency in general.3) Except its lower seed setting rate and germination rate,the change of external environment also was the main reason that led to the poor regeneration of O.aciphylla population at the east end of Hexi Corridor,because site condition changed from shifting sandy land to fixed sandy land,the quantity of shifting sand gradually decreased.Under this condition,the plants,especially the seedlings could not be buried by sand,and leading to lower survival rate.So,the feasible restoration and protection measures were very necessary,especially for poor growing population.

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备注/Memo

备注/Memo:
 收稿日期：2022-05-23 修回日期：2022-06-09
基金项目：国家自然科学基金（41661008）；甘肃省自然科学基金（1506RJZA137）；中央财政林业发展资金野生动植物保护项目；甘肃省重点人才计划项目。
第一作者：李亚，研究员，硕士。研究方向：荒漠植物生态。E-mail：lygdci@126.com
*通信作者：苏万红，工程师。研究方向：荒漠化防治。E-mail：22154534@qq.com
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