新疆野核桃自然保护区不同坡向野核桃幼苗种群年龄结构及生长特征

doi:10.13287/j.1001-9332.201702.006

应用生态学报 ›› 2017, Vol. 28 ›› Issue (2): 382-390.doi: 10.13287/j.1001-9332.201702.006

• 中国生态学学会2016年学术年会会议专栏 • 上一篇下一篇

新疆野核桃自然保护区不同坡向野核桃幼苗种群年龄结构及生长特征

张维^{1, 2}, 李海燕², 崔东¹, 杨允菲^2*

¹伊犁师范学院生物与地理科学学院, 新疆伊宁 835000;
²东北师范大学草地科学研究所植被生态科学教育部重点实验室, 长春 130024

收稿日期:2016-06-14 出版日期:2017-02-18 发布日期:2017-02-18
通讯作者: * E-mail: yangyf@nenu.edu.cn
作者简介:张维, 男, 1973年生, 博士, 副教授. 主要从事植物种群生态学研究. E-mail: zhangw891@nenu.edu.cn
基金资助:
本文由国家自然科学基金项目(31560095,31160072)和新疆教育厅普通高校重点实验室项目资助

Age structure and growth characteristics of Juglans cathayensis seedling populations at different slope aspects in Wild Walnut Natural Conservation Area of Xinjiang, China

ZHANG Wei^{1, 2}, LI Hai-yan², CUI Dong¹, YANG Yun-fei^2*

¹School of Biology and Geography, Yili Normal College, Yining 835000, Xinjiang, China;
²Ministry of Education Key Laboratory of Vegetation Ecology, Institute of Grassland Science, Northeast Normal University, Changchun 130024, China.

Received:2016-06-14 Online:2017-02-18 Published:2017-02-18
Contact: * E-mail: yangyf@nenu.edu.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (31560095, 31160072) and the Key Laboratory at Universities of Education Department of Xinjiang Uygur Autonomous Region of China.

摘要/Abstract

摘要： 为了解国家Ⅱ级渐危植物新疆野核桃不同年龄幼苗的数量组成及生长特性,在野核桃自然保护区不同坡向上设置4个2-hm²样地,应用相邻格子样方法对野核桃幼苗进行逐株调查,分析了野核桃幼苗种群的数量组成、基径和株高的生长特征及各性状间的生长关系.结果表明: 阳坡、半阳坡、阴坡和半阴坡野核桃1龄幼苗均较丰富,1～3龄幼苗数量均占绝对优势,不同坡向野核桃幼苗种群均呈增长型年龄结构.各坡向野核桃1龄幼苗平均5.7%可存活到4龄,平均1.7%可以存活到7龄.3龄是野核桃幼苗数量的一个转折点,幼苗种群在生活史中采用的是r对策.野核桃幼苗的基径和株高在3龄前生长缓慢,3龄后加快生长;基径平均生长速率为3.6 mm·a^-1,按阴坡、阳坡、半阴坡、半阳坡顺序减小;株高平均生长速率为9.0 cm·a^-1,按阳坡、半阳坡、半阴坡、阴坡顺序减小.不同坡向野核桃幼苗的基径与株高均随年龄的增加呈指数函数生长,株高与基径呈幂函数异速生长,幼苗各性状间的生长快慢可通过函数的性质和参数反映出来.

Abstract: For grasping the composition and growth characteristics of seedling populations of Juglans cathayensis, a national grade Ⅱ endangered plant, four 2-hm² plots were set up at different slope aspects in Wild Walnut Natural Conservation Area of Xinjiang, China. Adjacent lattice method was used to survey J. cathayensis seedlings. The relationships between the number, basal diameter and plant height of J. cathayensis seedling populations were analyzed. The results showed that seedlings at 1st age were more abundant on sunny, semi-sunny, shady and semi-shady slopes. The number of seedlings was predominant at 1st-3rd age. Seedling populations at different slope aspects showed an expanding age structure. 5.7% of 1st age seedlings could survive to 4th age, and 1.7% could survive to 7th age. The number of J. cathayensis seedlings had a critical turning point at the 3rd age. The seedlings of J. cathayensis were considered as r-strategists in their lives. The basal diameter and plant height of seedlings were slow-growing before 3rd age and fast-growing after 3rd age. Average growth rate of basal diameter was 3.6 mm·a^-1and decreased in the order of shady slope, sunny slope, semi-shady slope and semi-sunny slope. Average growth rate of plant height was 9.0 cm·a^-1 and decreased in the order of sunny slope, semi-sunny slope, semi-shady slope and shady slope. Basal diameter and plant height of seedlings exponentially increased with the increase of age. The relationships between plant height and basal diameter showed power function. Growth rates of seedling traits could be reflected by the properties and parameters of functions.

张维, 李海燕, 崔东, 杨允菲. 新疆野核桃自然保护区不同坡向野核桃幼苗种群年龄结构及生长特征[J]. 应用生态学报, 2017, 28(2): 382-390.

ZHANG Wei, LI Hai-yan, CUI Dong, YANG Yun-fei. Age structure and growth characteristics of Juglans cathayensis seedling populations at different slope aspects in Wild Walnut Natural Conservation Area of Xinjiang, China[J]. Chinese Journal of Applied Ecology, 2017, 28(2): 382-390.

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新疆野核桃自然保护区不同坡向野核桃幼苗种群年龄结构及生长特征

Age structure and growth characteristics of Juglans cathayensis seedling populations at different slope aspects in Wild Walnut Natural Conservation Area of Xinjiang, China

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