古尔班通古特沙漠南缘不同林龄人工梭梭林主林层和更新层特征

doi:10.13287/j.1001-9332.201703.030

应用生态学报 ›› 2017, Vol. 28 ›› Issue (3): 739-747.doi: 10.13287/j.1001-9332.201703.030

古尔班通古特沙漠南缘不同林龄人工梭梭林主林层和更新层特征

陈启民^1,2, 罗青红^2,3, 宁虎森², 赵成义³, 段文标^1*

¹东北林业大学林学院, 哈尔滨 150040
²新疆林业科学院造林治沙研究所, 乌鲁木齐 830063
³中国科学院新疆生态与地理研究所, 乌鲁木齐 830011

收稿日期:2016-07-01 发布日期:2017-03-18
通讯作者: *E-mail: dwbiao88@163.com
作者简介:陈启民,男,1975年生,硕士研究生,副研究员.主要从事荒漠化防治和防护林研究.E-mail:xjchenqimin@126.com
基金资助:
本文由“十二五”国家科技支撑计划项目(2012BAD16B03)、国家重大基础研究发展计划项目(2013CB429905)和公益性科研院所基本科研业务费专项(XMBM000002014,KY201516)资助

Characteristics of main layer and regeneration layer of Haloxylon ammodendron plantations at different ages on the southern edge of the Gurbantunggut Desert, Northwest China

CHEN Qi-min^1,2, LUO Qing-hong^2,3, NING Hu-sen², ZHAO Cheng-yi³, DUAN Wen-biao^1*

¹School of Forestry, Northeast Forestry University, Harbin 150040, China
²Institute of Afforestation and Sand Control, Xinjiang Academy of Forestry Sciences, Urumqi 830063, China
³Xinjiang Institute of Eco-logy and Geography, Chinese Academic of Sciences, Urumqi 830011, China

Received:2016-07-01 Published:2017-03-18
Contact: *E-mail: dwbiao88@163.com
Supported by:
This work was supported by the National ‘the 12^th 5-year-plan’ Key Science and Technology Support Program (2012BAD16B03), the Key Project of National Programs for Fundamental Research and Development (2013CB429905), and the Basic Scientific Research Fund for the Public Welfare Scientific Research Institute (XMBM000002014, KY201516)

摘要/Abstract

摘要： 对古尔班通古特沙漠南缘6个不同林龄人工梭梭种群的结构特征、天然更新及影响因子进行研究.结果表明: 7年生人工梭梭林能天然更新,17年生时幼苗(高度H＜30 cm)、幼树(30≤H＜50 cm)和小树(H≥50 cm)的密度均达到“优”级,小树的平均高度和基径为1.10 m和1.91 cm.20年生人工梭梭林内母树长势最好,35%的个体树高在2.50～3.00 m,23.1%个体的基径达8.00～10.00 cm; 33年生人工梭梭林内母树高和径生长明显衰退,但自然落种更新能力依然较强; 梭梭自然落种更新密度与0～100 cm土层土壤有效氮含量的关联度最大(0.87),其次是土壤速效磷(0.84)及土壤水分含量(0.79),pH 8.1～8.6的土壤未限制更新层的营养生长.在主林层,与整个更新层个体密度关联性最高的是人工梭梭林母树生物量(0.77),而与更新层小树密度关联性最高的是种植密度(0.71)和母树年龄(0.70).

关键词: 更新层, 梭梭人工林, 主林层

Abstract: The population structure characteristics, natural regeneration, and the influential factors of Haloxylon ammodendron plantations at six different stand ages on the southern edge of the Gurbantunggut Desert were studied. The results showed that H. ammodendron plantation at the stand age of 7 could naturally regenerate. At the stand age of 17, the densities of the seedlings (＜30 cm height), saplings (30≤H＜50 height), and small trees (≥50 cm height) reached optimal class, and the mean height and base diameter of the small tress reached 1.10 m and 1.91 cm, respectively. The parent trees in H. ammodendron plantation at the stand age of 20 grew best. The height of 35% individuals grew up to 2.50-3.00 m, and the basal stem diameter of 23.1% individuals grew up to 8.00-10.00 cm. The height and diameter growth of the parent trees in H. ammodendron plantation at the stand age of 33 apparently declined, but the regeneration ability by natural seed dispersal was still strong. The regeneration density of natural seed dispersal showed the greatest correlation with the available nitrogen content in 0-100 cm soil layer (0.87), followed by the soil rapidly available phosphorus content (0.84) and the soil water content (0.79). The soils with pH 8.1-8.6 did not limit the nutrient growth of the regeneration layer. In the main stand layer, the individual density of whole regeneration layer showed the greatest correlation with the biomass of the parent trees (0.77), while the density of regeneration layer of the small trees showed the greatest correlation with the planting density (0.71) and the age of the parent trees (0.70).

Key words: main stand layer, regeneration layer, Haloxylon ammodendron plantation

陈启民, 罗青红, 宁虎森, 赵成义, 段文标. 古尔班通古特沙漠南缘不同林龄人工梭梭林主林层和更新层特征[J]. 应用生态学报, 2017, 28(3): 739-747.

CHEN Qi-min, LUO Qing-hong, NING Hu-sen, ZHAO Cheng-yi, DUAN Wen-biao. Characteristics of main layer and regeneration layer of Haloxylon ammodendron plantations at different ages on the southern edge of the Gurbantunggut Desert, Northwest China[J]. Chinese Journal of Applied Ecology, 2017, 28(3): 739-747.

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古尔班通古特沙漠南缘不同林龄人工梭梭林主林层和更新层特征

Characteristics of main layer and regeneration layer of Haloxylon ammodendron plantations at different ages on the southern edge of the Gurbantunggut Desert, Northwest China

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